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To: Qin Wu <bill.wu@huawei.com>, "Ogaki, Kenichi" <ke-oogaki@kddi.com>, "l3sm@ietf.org" <l3sm@ietf.org>
Cc: "'Benoit Claise (bclaise)'" <bclaise@cisco.com>, "adrian@olddog.co.uk" <adrian@olddog.co.uk>
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From: David Ball <daviball@cisco.com>
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Date: Tue, 1 Aug 2017 15:34:22 +0100
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Subject: Re: [L3sm] Followup of RFC8049bis
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Hi Qin,


Any update on this?


     David


On 20/07/2017 16:36, Qin Wu wrote:
> In trip, will ping all other L2SM design team members for this, and get back to you.
>
> -Qin
> ________________________________________
> 发件人: David Ball [daviball@cisco.com]
> 发送时间: 2017年7月18日 19:56
> 收件人: Ogaki, Kenichi; Qin Wu; l3sm@ietf.org
> 抄送: 'Benoit Claise (bclaise)'; adrian@olddog.co.uk
> 主题: Re: [L3sm] Followup of RFC8049bis
>
> Qin, do you agree here?  Could we put some statement like this in section 5?
>
>       David
>
> On 14/07/2017 09:05, Ogaki, Kenichi wrote:
>> Hi David,
>>
>>> Another way of looking at it: would it be correct to say that the way the model is intended to be used is that the SP's system is the server and the customer's
>>> system is the client?
>> [KO] This best describes the rational of this model.
>>
>>> In that case, any information intended to be passed from the SP to the customer could be modelled with "config false", meaning that the
>>> SP could change it but the customer could not.
>> [KO] Yes, "config false" or NACM is utilized for this purpose.
>>
>> Thanks,
>> Kenichi
>>
>> -----Original Message-----
>> From: L3sm [mailto:l3sm-bounces@ietf.org] On Behalf Of David Ball
>> Sent: Thursday, July 13, 2017 8:30 PM
>> To: Ogaki, Kenichi; 'Qin Wu'; l3sm@ietf.org
>> Cc: 'Benoit Claise (bclaise)'; adrian@olddog.co.uk
>> Subject: Re: [L3sm] Followup of RFC8049bis
>>
>> Hi Kenichi,
>>
>>
>> On 13/07/2017 11:44, Ogaki, Kenichi wrote:
>>
>>
>>                Anyway, does the following paragraph in section 5 cover the rational?
>>
>>                The idea of the L3 IP VPN service model is to propose an abstracted
>>                    interface between customers and network operators to manage
>>                    configuration of components of an L3VPN service.  A typical scenario
>>                    would be to use this model as an input for an orchestration layer
>>                    that will be responsible for translating it to an orchestrated
>>                    configuration of network elements that will be part of the service.
>>
>>        To me, this paragraph does not clearly express that the information that needs to be passed from the SP to the customer is not in scope.  I would like to see that stated explicitly, if that is indeed the intent.
>>
>>        [KO] I can't agree with that.
>>        Even though the current model doesn't intend something, to exclude their future possibility only brings a disadvantage rather than an advantage.
>>        I can't see any major advantage to state that explicitly.
>>
>> I agree, we do not want to preclude future enhancements.  However, I do think this is critical to help an unfamiliar reader understand and use the model we have today.  How about text like this:
>>
>> "The version of the model described in this document does not include information that is passed from the SP to the customer.  This could be added in a future extension or augmentation."
>>
>> Another way of looking at it: would it be correct to say that the way the model is intended to be used is that the SP's system is the server and the customer's system is the client?  In that case, any information intended to be passed from the SP to the customer could be modelled with "config false", meaning that the SP could change it but the customer could not.
>>
>>
>>       David
>>
>>
> --
> David Ball
> <daviball@cisco.com>
> _______________________________________________
> L3sm mailing list
> L3sm@ietf.org
> https://www.ietf.org/mailman/listinfo/l3sm

-- 
David Ball
<daviball@cisco.com>


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From: Qin Wu <bill.wu@huawei.com>
To: "l3sm@ietf.org" <l3sm@ietf.org>, David Ball <daviball@cisco.com>
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Thanks Qin, I think we are getting close. :)

Here is a new list of issues (some unresolved from before, some new):

 1. In section 6.2.2, based on the previous discussion we can add a
    statement like: "A service with more than one cloud access is
    functionally identical to multiple services each with a single cloud
    access, where the sites that belong to each service in the latter
    case correspond with the authorized sites for each cloud access in
    the former case.  However, defining a single service with multiple
    cloud accesses may be operationally simpler."
 2. In section 6.3, I think we can add a statement like: "Multiple
    locations can be associated with a single site, but a particular
    location cannot be associated with more than one site." (Personally
    I don't see the need for this restriction, but this sentence is
    based on the previous discussion).
 3. Section 6.3.2.2.1: I don't think we concluded on whether or not
    there is a valid use case whereby *only* IPv6 link-local addresses
    are used for the site-network-access IP addressing, and no other
    addresses.  Currently this can't be represented in the model -
    should it be?  If so, then a sixth option for
    address-allocation-type needs to be added, for "link-local-only". 
    Otherwise, we can ignore it.
 4. In section 6.5.1.3, the ambiguous sentence needs to be fixed.
    OLD: "It is similar to having separate sites, but in this case the
    customer wants to share some physical components while maintaining
    strong communication isolation between the affiliates."
    NEW: "It is similar to having separate sites, but in the case of a
    SubVPN, the customer can share some physical components at a single
    location, while maintaining strong communication isolation between
    the affiliates."
 5. In section 6.5.2.2, the text and examples need to be updated to
    account for the changes you made to VPN policies for multi-VPN and
    multi-filter.  Also need to check all other examples in the doc to
    see if similar fixes are needed.
 6. In section 6.11.6, we can add a statement to clarify that other
    parameters are not in scope; e.g. at the bottom of page 87 add:
    "Other OSPF parameters, such as timers, are typically set by the SP
    and communicated to the customer outside the scope of this model."
 7. Similarly in section 6.11.7, at the end of the second paragraph on
    page 89 (beginning "In the case of dual stack"), we can add: "This,
    along with other BGP parameters such as timers, is communicated to
    the customer outside the scope of this model."
 8. Also for BGP, in the previous discussion we agreed that the case of
    eBGP multihop peering between loopbacks could be added as an augment
    to the model if necessary.  However, in section 6.11.7, it says that
    in the case of BGP, 'the "static-address" allocation type for the IP
    connection MUST be used.'  This wouldn't be necessary in the eBGP
    multihop case.  Could we change the sentence to the following?
    'If the site-network-access connection addresses are used for BGP
    peering, the "static-address" allocation type for the IP connection
    MUST be used. Other peering mechanisms are outside the scope of this
    model.'
 9. In section 6.12.2.2, the second paragraph needs to be updated (or
    deleted?) now that you have added the "direction" leaf.
10. In section 6.12.2.2, my question about how to interpret the case
    where end-to-end is true in an asymmetric VPN is still unanswered. 
    You said that target-sites could be used in the
    qos-classification-policy to determine the source and destination
    between which the bandwidth needs to be reserved - that's true, but
    my question is about the case where target-sites is not used.  For
    example, suppose there is a VPN with 3 sites, and at each site the
    qos-classification policy results in a single class, "foo", that
    matches all traffic. Suppose the qos-profile is defined with the
    following values; then what bandwidth should the SP reserve for
    traffic from A to B?  From B to A?  From B to C?  Or should they
    reject the request?
     1. Site A: svc-input-bandwidth = svc-output-bandwidth = 100000000,
        for class "foo" guaranteed-bw-percent = 10, direction = both,
        end-to-end = true
     2. Site B: svc-input-bandwidth = svc-output-bandwidth = 200000000,
        for class "foo" guaranteed-bw-percent = 20, direction = both,
        end-to-end = true
     3. Site C: svc-input-bandwidth = svc-output-bandwidth = 300000000,
        for class "foo" guaranteed-bw-percent = 30, direction = both,
        end-to-end = true
11. In accordance with the clarified scope, parts of the model that
    correspond with information provided by the SP need to be marked
    with "config false".  I've identified the following, but there might
    be more.
     1. The list of profiles of various types (i.e.
        l3vpn-service/vpn-profiles)
     2. For the connection addresses, the provider's IP address/mask:
          * l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/provider-address
          * l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/mask
          * l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/provider-address
          * l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/mask
          * l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/provider-address
          * l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/mask
          * l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/provider-address
          * l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/mask
          * l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/provider-address
          * l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/mask
          * l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/addresses/provider-address
          * l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/addresses/mask
12. The value carried in the svc-mtu leaf is now described more clearly,
    but its intended use is still unclear, at least to me. Would
    something like the following be correct?  If not, what is the
    correct expression of how to interpret this leaf?
    "For a given VPN service, the service provider may discard (or for
    IPv4, may fragment) packets that are longer than the smallest
    svc-mtu across all site-network-accesses for all sites in the VPN."
13. In the new filters container, there is a list of filters indexed by
    type (ipv4, ipv6, lan-tag, or vpn-policy-filter-type).  Each filter
    contains a leaf-list of IPv4 prefixes, a leaf-list of ipv6 prefixes
    and a leaf-list of lan-tags.  Is the intent that the contents of the
    filter matches the type?  There is nothing to enforce that currently
    - should there be a "when" statement for each leaf-list, to restrict
    it to only the case where the type is appropriate (e.g. the
    ipv4-lan-prefix leaf-list would have "when ../type = ipv4")?
    I don't really understand what this new filter list achieves over
    having a single filter that could contain a mix of ipv4 prefixes,
    ipv6 prefixes and lan-tags.  What's the advantage of 3 filters each
    containing a single type over one filter containing all three types?
14. As no-one can remember why BFD can only be specified on
    site-network-accesses and not on sites, I suggest allowing both
    options - i.e. move the "oam" container from "grouping
    site-attachment-ip-connection" to "grouping site-routing"; or better
    still, move it to its own grouping, and use that grouping in both
    site-top-level-cfg and site-network-access-top-level-cfg.
15. For the site-network-access connection addressing,
    ip-connection/ipv4/address-allocation-type is optional with no
    default, but ip-connection/ipv6/address-allocation-type has a
    default defined (static-addressing).  This means it's impossible to
    have a site-network-access that only uses IPv4 addressing.  I think
    the default should be deleted in the IPv6 case, so that an IPv4-only
    site-network-access could be represented by simply not setting the
    IPv6 address-allocation-type.


Thanks,


     David


On 09/08/2017 11:40, Qin Wu wrote:
> Here is the update to draft-wu-l3sm-rfc8049bis-02 based on additional discussion on the list.
> https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt
> Thank David for additional comments. Thank Design team to help address these comments.
> The main changes include:
> 1.Clarify the rational of the model in the section 5 based on David's comment.
> 2.Add multi-filter and multi-VPN per entry support for VPN policy.
> 3.Modify description for svc-input-bandwidth leaf and svc-output-
> Bandwidth leaf to address inconsistency issue with the text in section 6.12.1.
> 4. Add text to clarify the way to achieve Per-VPN QoS policy.
> 5. Remove address-scope-type since there is no common understanding on this.
> 6. Modify the description of autonomous-system under container “BGP” to address David's comment on AS.
>
> Regarding provider address and mask to the model for the DHCP and DHCP relay cases, talking with design team members,
> We believe these parameters are the one requested by Customer to Provider and therefore we keep it in the model.
>
> Regarding Number of BGP sessions, eBGP multihop between loopbacks and other similar issue, The design team agreed that it is not
> reasonable to enumerate all the cases this models doesn't support. The current text has been clear about this.
>
> We believe that we have address all the comments. Thanks!
>
> -Qin
> -----邮件原件-----
> 发件人: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org]
> 发送时间: 2017年8月9日 18:20
> 收件人: Qin Wu; Luis Tomotaki; Kenichi Ogaki; Stephane Litkowski
> 主题: New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
>
>
> A new version of I-D, draft-wu-l3sm-rfc8049bis-02.txt has been successfully submitted by Qin Wu and posted to the IETF repository.
>
> Name:		draft-wu-l3sm-rfc8049bis
> Revision:	02
> Title:		YANG Data Model for L3VPN Service Delivery
> Document date:	2017-08-09
> Group:		Individual Submission
> Pages:		181
> URL:            https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt
> Status:         https://datatracker.ietf.org/doc/draft-wu-l3sm-rfc8049bis/
> Htmlized:       https://tools.ietf.org/html/draft-wu-l3sm-rfc8049bis-02
> Htmlized:       https://datatracker.ietf.org/doc/html/draft-wu-l3sm-rfc8049bis-02
> Diff:           https://www.ietf.org/rfcdiff?url2=draft-wu-l3sm-rfc8049bis-02
>
> Abstract:
>     This document defines a YANG data model that can be used for
>     communication between customers and network operators and to deliver
>     a Layer 3 provider-provisioned VPN service.  This document is limited
>     to BGP PE-based VPNs as described in RFCs 4026, 4110, and 4364.  This
>     model is intended to be instantiated at the management system to
>     deliver the overall service.  It is not a configuration model to be
>     used directly on network elements.  This model provides an abstracted
>     view of the Layer 3 IP VPN service configuration components.  It will
>     be up to the management system to take this model as input and use
>     specific configuration models to configure the different network
>     elements to deliver the service.  How the configuration of network
>     elements is done is out of scope for this document.
>
>     If approved, this document obsoletes RFC 8049.  The changes are a
>     series of small fixes to the YANG module, and some clarifications to
>     the text.
>
>                                                                                    
>
>
> Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org.
>
> The IETF Secretariat
>
> _______________________________________________
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> L3sm@ietf.org
> https://www.ietf.org/mailman/listinfo/l3sm

-- 
David Ball
<daviball@cisco.com>


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<html>
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    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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  <body text="#000000" bgcolor="#FFFFFF">
    <p>Thanks Qin, I think we are getting close. :)<br>
    </p>
    Here is a new list of issues (some unresolved from before, some
    new):
    <ol>
      <li>In section 6.2.2, based on the previous discussion we can add
        a statement like: "A service with more than one cloud access is
        functionally identical to multiple services each with a single
        cloud access, where the sites that belong to each service in the
        latter case correspond with the authorized sites for each cloud
        access in the former case.  However, defining a single service
        with multiple cloud accesses may be operationally simpler."</li>
      <li>In section 6.3, I think we can add a statement like: "Multiple
        locations can be associated with a single site, but a particular
        location cannot be associated with more than one site." 
        (Personally I don't see the need for this restriction, but this
        sentence is based on the previous discussion).</li>
      <li>Section 6.3.2.2.1: I don't think we concluded on whether or
        not there is a valid use case whereby <b>only</b> IPv6
        link-local addresses are used for the site-network-access IP
        addressing, and no other addresses.  Currently this can't be
        represented in the model - should it be?  If so, then a sixth
        option for address-allocation-type needs to be added, for
        "link-local-only".  Otherwise, we can ignore it.<br>
      </li>
      <li>In section 6.5.1.3, the ambiguous sentence needs to be fixed.<br>
        OLD: "It is similar to having separate sites, but in this case
        the customer wants to share some physical components while
        maintaining strong communication isolation between the
        affiliates."<br>
        NEW: "It is similar to having separate sites, but in <font
          color="#ff0000">the case of a SubVPN,</font> the customer <font
          color="#ff0000">can</font> share some physical components <font
          color="#ff0000">at a single location,</font> while maintaining
        strong communication isolation between the affiliates."</li>
      <li>In section 6.5.2.2, the text and examples need to be updated
        to account for the changes you made to VPN policies for
        multi-VPN and multi-filter.  Also need to check all other
        examples in the doc to see if similar fixes are needed.</li>
      <li>In section 6.11.6, we can add a statement to clarify that
        other parameters are not in scope; e.g. at the bottom of page 87
        add: "Other OSPF parameters, such as timers, are typically set
        by the SP and communicated to the customer outside the scope of
        this model."</li>
      <li>Similarly in section 6.11.7, at the end of the second
        paragraph on page 89 (beginning "In the case of dual stack"), we
        can add: "This, along with other BGP parameters such as timers,
        is communicated to the customer outside the scope of this
        model."</li>
      <li>Also for BGP, in the previous discussion we agreed that the
        case of eBGP multihop peering between loopbacks could be added
        as an augment to the model if necessary.  However, in section
        6.11.7, it says that in the case of BGP, 'the "static-address"
        allocation type for the IP connection MUST be used.'  This
        wouldn't be necessary in the eBGP multihop case.  Could we
        change the sentence to the following?<br>
        '<font color="#ff0000">If the site-network-access connection
          addresses are used for BGP peering,</font> the "static-address"
        allocation type for the IP connection MUST be used.  <font
          color="#ff0000">Other peering mechanisms are outside the scope
          of this model.</font>'</li>
      <li>In section 6.12.2.2, the second paragraph needs to be updated
        (or deleted?) now that you have added the "direction" leaf.<br>
      </li>
      <li>In section 6.12.2.2, my question about how to interpret the
        case where end-to-end is true in an asymmetric VPN is still
        unanswered.  You said that target-sites could be used in the
        qos-classification-policy to determine the source and
        destination between which the bandwidth needs to be reserved -
        that's true, but my question is about the case where
        target-sites is not used.  For example, suppose there is a VPN
        with 3 sites, and at each site the qos-classification policy
        results in a single class, "foo", that matches all traffic. 
        Suppose the qos-profile is defined with the following values;
        then what bandwidth should the SP reserve for traffic from A to
        B?  From B to A?  From B to C?  Or should they reject the
        request?</li>
      <ol>
        <li>Site A: svc-input-bandwidth = svc-output-bandwidth =
          100000000, for class "foo" guaranteed-bw-percent = 10,
          direction = both, end-to-end = true</li>
        <li>Site B: svc-input-bandwidth = svc-output-bandwidth =
          200000000, for class "foo" guaranteed-bw-percent = 20,
          direction = both, end-to-end = true</li>
        <li>Site C: svc-input-bandwidth = svc-output-bandwidth =
          300000000, for class "foo" guaranteed-bw-percent = 30,
          direction = both, end-to-end = true</li>
      </ol>
      <li>In accordance with the clarified scope, parts of the model
        that correspond with information provided by the SP need to be
        marked with "config false".  I've identified the following, but
        there might be more.</li>
      <ol>
        <li>The list of profiles of various types (i.e.
          l3vpn-service/vpn-profiles)</li>
        <li>For the connection addresses, the provider's IP
          address/mask:<br>
        </li>
        <ul>
          <li>l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/provider-address</li>
          <li>l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/mask</li>
          <li>l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/provider-address</li>
          <li>l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/mask</li>
          <li>l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/provider-address</li>
          <li>l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/mask</li>
          <li>l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/provider-address</li>
          <li>l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/mask</li>
          <li>l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/provider-address</li>
          <li>l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/mask</li>
        </ul>
        <ul>
          <li>l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/addresses/provider-address</li>
          <li>l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/addresses/mask</li>
        </ul>
      </ol>
      <li>The value carried in the svc-mtu leaf is now described more
        clearly, but its intended use is still unclear, at least to me. 
        Would something like the following be correct?  If not, what is
        the correct expression of how to interpret this leaf?<br>
        "For a given VPN service, the service provider may discard (or
        for IPv4, may fragment) packets that are longer than the
        smallest svc-mtu across all site-network-accesses for all sites
        in the VPN."</li>
      <li>In the new filters container, there is a list of filters
        indexed by type (ipv4, ipv6, lan-tag, or
        vpn-policy-filter-type).  Each filter contains a leaf-list of
        IPv4 prefixes, a leaf-list of ipv6 prefixes and a leaf-list of
        lan-tags.  Is the intent that the contents of the filter matches
        the type?  There is nothing to enforce that currently - should
        there be a "when" statement for each leaf-list, to restrict it
        to only the case where the type is appropriate (e.g. the
        ipv4-lan-prefix leaf-list would have "when ../type = ipv4")?<br>
        I don't really understand what this new filter list achieves
        over having a single filter that could contain a mix of ipv4
        prefixes, ipv6 prefixes and lan-tags.  What's the advantage of 3
        filters each containing a single type over one filter containing
        all three types?</li>
      <li>As no-one can remember why BFD can only be specified on
        site-network-accesses and not on sites, I suggest allowing both
        options - i.e. move the "oam" container from "grouping
        site-attachment-ip-connection" to "grouping site-routing"; or
        better still, move it to its own grouping, and use that grouping
        in both site-top-level-cfg and
        site-network-access-top-level-cfg.</li>
      <li>For the site-network-access connection addressing,
        ip-connection/ipv4/address-allocation-type is optional with no
        default, but ip-connection/ipv6/address-allocation-type has a
        default defined (static-addressing).  This means it's impossible
        to have a site-network-access that only uses IPv4 addressing.  I
        think the default should be deleted in the IPv6 case, so that an
        IPv4-only site-network-access could be represented by simply not
        setting the IPv6 address-allocation-type.</li>
    </ol>
    <p><br>
    </p>
    <p>Thanks,<br>
    </p>
    <p><br>
    </p>
    <p>    David<br>
    </p>
    <p><br>
    </p>
    <div class="moz-cite-prefix">On 09/08/2017 11:40, Qin Wu wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AA5D7A2@nkgeml513-mbx.china.huawei.com">
      <pre wrap="">Here is the update to draft-wu-l3sm-rfc8049bis-02 based on additional discussion on the list.
<a class="moz-txt-link-freetext" href="https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt">https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt</a>
Thank David for additional comments. Thank Design team to help address these comments.
The main changes include:
1.Clarify the rational of the model in the section 5 based on David's comment.  
2.Add multi-filter and multi-VPN per entry support for VPN policy.  
3.Modify description for svc-input-bandwidth leaf and svc-output- 
Bandwidth leaf to address inconsistency issue with the text in section 6.12.1. 
4. Add text to clarify the way to achieve Per-VPN QoS policy.
5. Remove address-scope-type since there is no common understanding on this.
6. Modify the description of autonomous-system under container “BGP” to address David's comment on AS.

Regarding provider address and mask to the model for the DHCP and DHCP relay cases, talking with design team members,
We believe these parameters are the one requested by Customer to Provider and therefore we keep it in the model.

Regarding Number of BGP sessions, eBGP multihop between loopbacks and other similar issue, The design team agreed that it is not
reasonable to enumerate all the cases this models doesn't support. The current text has been clear about this.

We believe that we have address all the comments. Thanks!

-Qin
-----邮件原件-----
发件人: <a class="moz-txt-link-abbreviated" href="mailto:internet-drafts@ietf.org">internet-drafts@ietf.org</a> [<a class="moz-txt-link-freetext" href="mailto:internet-drafts@ietf.org">mailto:internet-drafts@ietf.org</a>] 
发送时间: 2017年8月9日 18:20
收件人: Qin Wu; Luis Tomotaki; Kenichi Ogaki; Stephane Litkowski
主题: New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt


A new version of I-D, draft-wu-l3sm-rfc8049bis-02.txt has been successfully submitted by Qin Wu and posted to the IETF repository.

Name:		draft-wu-l3sm-rfc8049bis
Revision:	02
Title:		YANG Data Model for L3VPN Service Delivery
Document date:	2017-08-09
Group:		Individual Submission
Pages:		181
URL:            <a class="moz-txt-link-freetext" href="https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt">https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt</a>
Status:         <a class="moz-txt-link-freetext" href="https://datatracker.ietf.org/doc/draft-wu-l3sm-rfc8049bis/">https://datatracker.ietf.org/doc/draft-wu-l3sm-rfc8049bis/</a>
Htmlized:       <a class="moz-txt-link-freetext" href="https://tools.ietf.org/html/draft-wu-l3sm-rfc8049bis-02">https://tools.ietf.org/html/draft-wu-l3sm-rfc8049bis-02</a>
Htmlized:       <a class="moz-txt-link-freetext" href="https://datatracker.ietf.org/doc/html/draft-wu-l3sm-rfc8049bis-02">https://datatracker.ietf.org/doc/html/draft-wu-l3sm-rfc8049bis-02</a>
Diff:           <a class="moz-txt-link-freetext" href="https://www.ietf.org/rfcdiff?url2=draft-wu-l3sm-rfc8049bis-02">https://www.ietf.org/rfcdiff?url2=draft-wu-l3sm-rfc8049bis-02</a>

Abstract:
   This document defines a YANG data model that can be used for
   communication between customers and network operators and to deliver
   a Layer 3 provider-provisioned VPN service.  This document is limited
   to BGP PE-based VPNs as described in RFCs 4026, 4110, and 4364.  This
   model is intended to be instantiated at the management system to
   deliver the overall service.  It is not a configuration model to be
   used directly on network elements.  This model provides an abstracted
   view of the Layer 3 IP VPN service configuration components.  It will
   be up to the management system to take this model as input and use
   specific configuration models to configure the different network
   elements to deliver the service.  How the configuration of network
   elements is done is out of scope for this document.

   If approved, this document obsoletes RFC 8049.  The changes are a
   series of small fixes to the YANG module, and some clarifications to
   the text.

                                                                                  


Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org.

The IETF Secretariat

_______________________________________________
L3sm mailing list
<a class="moz-txt-link-abbreviated" href="mailto:L3sm@ietf.org">L3sm@ietf.org</a>
<a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/l3sm">https://www.ietf.org/mailman/listinfo/l3sm</a>
</pre>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com">&lt;daviball@cisco.com&gt;</a></pre>
  </body>
</html>

--------------0C98AC5F0714B79ED6905552--


From nobody Sun Aug 20 02:12:16 2017
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Subject: [L3sm] Shepherd review of draft-wu-l3sm-rfc8049bis-02.txt
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Author, All,

I have done my document shepherd review of this document as part of the
publication process. My comments are basically nits and I suggest you fix them
at the same time as addressing the latest comments from David Ball. Then I will
do the document write-up and send the draft to the AD for publication.

Thanks,
Adrian

===

Many thanks for Section 1.4 that made this review much easier.

---

idnits reports some issues that you should handle:

  ** There are 132 instances of too long lines in the document, the longest
     one being 70 characters in excess of 72.

  It would be really nice if you fixed these.  If you don't then the RFC
  Editor will introduce line wraps and you might not like how they do it.


  == There are 2 instances of lines with non-RFC6890-compliant IPv4 addresses
     in the document.  If these are example addresses, they should be changed.

  This is a bogus warning, you can ignore it.


  == Line 486 has weird spacing: '...--rw id    str...'
  == Line 488 has weird spacing: '...--rw id    str...'
  == Line 490 has weird spacing: '...--rw id    str...'
  == Line 492 has weird spacing: '...--rw id    str...'
  == Line 566 has weird spacing: '...roup-id    str...'
  == (20 more instances...)

  These are bogus warnings, you can ignore them.


  == Missing Reference: 'VPN2' is mentioned on line 1839, but not defined
  == Missing Reference: 'VPN3' is mentioned on line 1848, but not defined

  This is the figure in 6.5.2.2.  I suggest that you use curved brackets
  as '(VPN2)'


  == Unused Reference: 'RFC6020' is defined on line 8310, but no explicit
     reference was found in the text

  I think you can simply remove this reference.


  ** Downref: Normative reference to an Informational RFC: RFC 4026

  You can move this reference to be Informative consistent with the
  reference to RFC 4110.

---

Section 1

OLD
   If approved, this document obsoletes [RFC8049].  The changes are a
   series of small fixes to the YANG module, and some clarifications to
   the text.

   The following changes were made:

   o  First change

   o  ...

   o  Last change
NEW
   If approved, this document obsoletes [RFC8049].  The changes are a
   series of small fixes to the YANG module, and some clarifications to
   the text.  The changes are listed in Section 1.4.
END

---

Section 5

OLD
   The model is
   intended to be used in the way that the network operator's system is
   the server and the customer's system is the client.
NEW
   The model is
   intended to be used in a mode where the network operator's system is
   the server and the customer's system is the client.
END

---

Section 6.3

OLD
   A particular location or a set of locations must be
   associated with each site.
NEW
   Each site is associated with one or more location.
END

---

Section 6.12.2.2

OLD
   o  direction: used to specify the direction which qos profile is
      applied to.  Our proposed model supports "Site-to-WAN" direction,
      "WAN-to-Site"direction and "both" direction.  By default, "both"
      direction is used.
NEW
   o  direction: used to specify the direction to which the qos profile
      is applied.  This model supports three direction settings: 
      "Site-to-WAN", "WAN-to-Site", and "both".  By default, the "both"
      direction value is used.
END

---

Section 11

OLD
   This document adds a new YANG module name in the "YANG Module Names"
   registry [RFC7950]:

           Name: ietf-l3vpn-svc
           Namespace: urn:ietf:params:xml:ns:yang:ietf-l3vpn-svc
           Prefix: l3vpn-svc
           Reference: RFC 8049
NEW
   IANA has recorded a YANG module name in the "YANG Module Names"
   registry [RFC7950] as follows:

           Name: ietf-l3vpn-svc
           Namespace: urn:ietf:params:xml:ns:yang:ietf-l3vpn-svc
           Prefix: l3vpn-svc
           Reference: RFC 8049

   IANA is requested to update this registry to reference this document
   on publication as an RFC.
END


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Subject: Re: [L3sm] Shepherd review of draft-wu-l3sm-rfc8049bis-02.txt
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Apologies for immediately updating this. I found another set of nits. 

In several places you use "proposed" to describe this work. But since it will be
an RFC we don't need to be so timid.

6.2.1
OLD
   Our proposed model supports any-to-any
NEW
   This model supports any-to-any
END

6.2.2
OLD
  The proposed model provides cloud access configuration
NEW
  The model defined in this document provides cloud access configuration
END

6.2.3
OLD
  The proposed model supports bidirectional
NEW
  This model supports bidirectional
END

6.2.3
OLD
  Some containers proposed in the model
NEW
  Some containers in the model
END

6.6.5
OLD
   Some infeasible access placement scenarios could be created via the
   proposed configuration framework.
NEW
   Some infeasible access placement scenarios could be created via the
   configuration framework.
END

6.12.2.2 as already noted

6.13.1
OLD
  In the proposed model, LDP or BGP can be used
NEW
  In the model, LDP or BGP can be used
END

Adrian

> -----Original Message-----
> From: L3sm [mailto:l3sm-bounces@ietf.org] On Behalf Of Adrian Farrel
> Sent: 20 August 2017 10:12
> To: l3sm@ietf.org; draft-wu-l3sm-rfc8049bis@ietf.org
> Subject: [L3sm] Shepherd review of draft-wu-l3sm-rfc8049bis-02.txt
> 
> Author, All,
> 
> I have done my document shepherd review of this document as part of the
> publication process. My comments are basically nits and I suggest you fix them
> at the same time as addressing the latest comments from David Ball. Then I
will
> do the document write-up and send the draft to the AD for publication.
> 
> Thanks,
> Adrian
> 
> ===
> 
> Many thanks for Section 1.4 that made this review much easier.
> 
> ---
> 
> idnits reports some issues that you should handle:
> 
>   ** There are 132 instances of too long lines in the document, the longest
>      one being 70 characters in excess of 72.
> 
>   It would be really nice if you fixed these.  If you don't then the RFC
>   Editor will introduce line wraps and you might not like how they do it.
> 
> 
>   == There are 2 instances of lines with non-RFC6890-compliant IPv4 addresses
>      in the document.  If these are example addresses, they should be changed.
> 
>   This is a bogus warning, you can ignore it.
> 
> 
>   == Line 486 has weird spacing: '...--rw id    str...'
>   == Line 488 has weird spacing: '...--rw id    str...'
>   == Line 490 has weird spacing: '...--rw id    str...'
>   == Line 492 has weird spacing: '...--rw id    str...'
>   == Line 566 has weird spacing: '...roup-id    str...'
>   == (20 more instances...)
> 
>   These are bogus warnings, you can ignore them.
> 
> 
>   == Missing Reference: 'VPN2' is mentioned on line 1839, but not defined
>   == Missing Reference: 'VPN3' is mentioned on line 1848, but not defined
> 
>   This is the figure in 6.5.2.2.  I suggest that you use curved brackets
>   as '(VPN2)'
> 
> 
>   == Unused Reference: 'RFC6020' is defined on line 8310, but no explicit
>      reference was found in the text
> 
>   I think you can simply remove this reference.
> 
> 
>   ** Downref: Normative reference to an Informational RFC: RFC 4026
> 
>   You can move this reference to be Informative consistent with the
>   reference to RFC 4110.
> 
> ---
> 
> Section 1
> 
> OLD
>    If approved, this document obsoletes [RFC8049].  The changes are a
>    series of small fixes to the YANG module, and some clarifications to
>    the text.
> 
>    The following changes were made:
> 
>    o  First change
> 
>    o  ...
> 
>    o  Last change
> NEW
>    If approved, this document obsoletes [RFC8049].  The changes are a
>    series of small fixes to the YANG module, and some clarifications to
>    the text.  The changes are listed in Section 1.4.
> END
> 
> ---
> 
> Section 5
> 
> OLD
>    The model is
>    intended to be used in the way that the network operator's system is
>    the server and the customer's system is the client.
> NEW
>    The model is
>    intended to be used in a mode where the network operator's system is
>    the server and the customer's system is the client.
> END
> 
> ---
> 
> Section 6.3
> 
> OLD
>    A particular location or a set of locations must be
>    associated with each site.
> NEW
>    Each site is associated with one or more location.
> END
> 
> ---
> 
> Section 6.12.2.2
> 
> OLD
>    o  direction: used to specify the direction which qos profile is
>       applied to.  Our proposed model supports "Site-to-WAN" direction,
>       "WAN-to-Site"direction and "both" direction.  By default, "both"
>       direction is used.
> NEW
>    o  direction: used to specify the direction to which the qos profile
>       is applied.  This model supports three direction settings:
>       "Site-to-WAN", "WAN-to-Site", and "both".  By default, the "both"
>       direction value is used.
> END
> 
> ---
> 
> Section 11
> 
> OLD
>    This document adds a new YANG module name in the "YANG Module Names"
>    registry [RFC7950]:
> 
>            Name: ietf-l3vpn-svc
>            Namespace: urn:ietf:params:xml:ns:yang:ietf-l3vpn-svc
>            Prefix: l3vpn-svc
>            Reference: RFC 8049
> NEW
>    IANA has recorded a YANG module name in the "YANG Module Names"
>    registry [RFC7950] as follows:
> 
>            Name: ietf-l3vpn-svc
>            Namespace: urn:ietf:params:xml:ns:yang:ietf-l3vpn-svc
>            Prefix: l3vpn-svc
>            Reference: RFC 8049
> 
>    IANA is requested to update this registry to reference this document
>    on publication as an RFC.
> END
> 
> _______________________________________________
> L3sm mailing list
> L3sm@ietf.org
> https://www.ietf.org/mailman/listinfo/l3sm


From nobody Sun Aug 20 03:46:15 2017
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Reply-To: <adrian@olddog.co.uk>
From: "Adrian Farrel" <adrian@olddog.co.uk>
To: <l3sm@ietf.org>, <draft-wu-l3sm-rfc8049bis@ietf.org>
References: <008901d31994$6466cfb0$2d346f10$@olddog.co.uk> <00bd01d31999$c4b540e0$4e1fc2a0$@olddog.co.uk>
In-Reply-To: <00bd01d31999$c4b540e0$4e1fc2a0$@olddog.co.uk>
Date: Sun, 20 Aug 2017 11:46:06 +0100
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Archived-At: <https://mailarchive.ietf.org/arch/msg/l3sm/mNbBj0JKqqa-JDeyurhO7BVAlgI>
Subject: Re: [L3sm] Shepherd review of draft-wu-l3sm-rfc8049bis-02.txt
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And, of course, I also found "proposes". Sorry for the series of emails.

Adrian

6.1
OLD
   This model also proposes some features for options that
   are more advanced, such as support for extranet VPNs (Section 6.2.4),
   site diversity (Section 6.6), and QoS (Section 6.12.2).
NEW
   This model also defines some features for options that
   are more advanced, such as support for extranet VPNs (Section 6.2.4),
   site diversity (Section 6.6), and QoS (Section 6.12.2).
END

6.1
OLD
   For
   example, this model proposes different options for IP address
   assignments; if those options do not fulfill all requirements, new
   options can be added through augmentation.
NEW
   For
   example, this model uses different options for IP address
   assignments; if those options do not fulfil all requirements, new
   options can be added through augmentation.
END

6.3.2.2.1
OLD
   The current model proposes five ways to perform IP
   address allocation:
NEW
   This model defines five ways to perform IP
   address allocation:
END

6.6
OLD
   The current model proposes parameters and constraints that can
   influence the meshing of the site-network-access.
NEW
   This model defines parameters and constraints that can
   influence the meshing of the site-network-access.
END

6.6.4
OLD
   The current model proposes multiple constraint-types:
NEW
   This model defines multiple constraint-types:
END

6.10
OLD
   The model proposes three types of common management options:
NEW
   This model defines three types of common management options:
END

6.10
OLD
   In the co-managed case, the model proposes some options to define the
   management address family (IPv4 or IPv6) and the associated
   management address.
NEW
   In the co-managed case, this model defines options to define the
   management address family (IPv4 or IPv6) and the associated
   management address.
END

6.11.6
OLD
   The model also proposes an option to create an OSPF sham link between
   two sites sharing the same area and having a backdoor link.
NEW
   This model also defines an option to create an OSPF sham link between
   two sites sharing the same area and having a backdoor link.
END

6.12.2
OLD
   The model proposes to define QoS parameters in an abstracted way:
NEW
   This model defines QoS parameters in an abstracted way:
END

10
OLD
   The data model proposes some security parameters than can be extended
   via augmentation as part of the customer service request; those
   parameters are described in Section 6.9.
NEW
   This data model defines some security parameters than can be extended
   via augmentation as part of the customer service request; those
   parameters are described in Section 6.9.
END

> -----Original Message-----
> From: L3sm [mailto:l3sm-bounces@ietf.org] On Behalf Of Adrian Farrel
> Sent: 20 August 2017 10:51
> To: l3sm@ietf.org; draft-wu-l3sm-rfc8049bis@ietf.org
> Subject: Re: [L3sm] Shepherd review of draft-wu-l3sm-rfc8049bis-02.txt
> 
> Apologies for immediately updating this. I found another set of nits.
> 
> In several places you use "proposed" to describe this work. But since it will
be
> an RFC we don't need to be so timid.
> 
> 6.2.1
> OLD
>    Our proposed model supports any-to-any
> NEW
>    This model supports any-to-any
> END
> 
> 6.2.2
> OLD
>   The proposed model provides cloud access configuration
> NEW
>   The model defined in this document provides cloud access configuration
> END
> 
> 6.2.3
> OLD
>   The proposed model supports bidirectional
> NEW
>   This model supports bidirectional
> END
> 
> 6.2.3
> OLD
>   Some containers proposed in the model
> NEW
>   Some containers in the model
> END
> 
> 6.6.5
> OLD
>    Some infeasible access placement scenarios could be created via the
>    proposed configuration framework.
> NEW
>    Some infeasible access placement scenarios could be created via the
>    configuration framework.
> END
> 
> 6.12.2.2 as already noted
> 
> 6.13.1
> OLD
>   In the proposed model, LDP or BGP can be used
> NEW
>   In the model, LDP or BGP can be used
> END
> 
> Adrian
> 
> > -----Original Message-----
> > From: L3sm [mailto:l3sm-bounces@ietf.org] On Behalf Of Adrian Farrel
> > Sent: 20 August 2017 10:12
> > To: l3sm@ietf.org; draft-wu-l3sm-rfc8049bis@ietf.org
> > Subject: [L3sm] Shepherd review of draft-wu-l3sm-rfc8049bis-02.txt
> >
> > Author, All,
> >
> > I have done my document shepherd review of this document as part of the
> > publication process. My comments are basically nits and I suggest you fix
them
> > at the same time as addressing the latest comments from David Ball. Then I
> will
> > do the document write-up and send the draft to the AD for publication.
> >
> > Thanks,
> > Adrian
> >
> > ===
> >
> > Many thanks for Section 1.4 that made this review much easier.
> >
> > ---
> >
> > idnits reports some issues that you should handle:
> >
> >   ** There are 132 instances of too long lines in the document, the longest
> >      one being 70 characters in excess of 72.
> >
> >   It would be really nice if you fixed these.  If you don't then the RFC
> >   Editor will introduce line wraps and you might not like how they do it.
> >
> >
> >   == There are 2 instances of lines with non-RFC6890-compliant IPv4
addresses
> >      in the document.  If these are example addresses, they should be
changed.
> >
> >   This is a bogus warning, you can ignore it.
> >
> >
> >   == Line 486 has weird spacing: '...--rw id    str...'
> >   == Line 488 has weird spacing: '...--rw id    str...'
> >   == Line 490 has weird spacing: '...--rw id    str...'
> >   == Line 492 has weird spacing: '...--rw id    str...'
> >   == Line 566 has weird spacing: '...roup-id    str...'
> >   == (20 more instances...)
> >
> >   These are bogus warnings, you can ignore them.
> >
> >
> >   == Missing Reference: 'VPN2' is mentioned on line 1839, but not defined
> >   == Missing Reference: 'VPN3' is mentioned on line 1848, but not defined
> >
> >   This is the figure in 6.5.2.2.  I suggest that you use curved brackets
> >   as '(VPN2)'
> >
> >
> >   == Unused Reference: 'RFC6020' is defined on line 8310, but no explicit
> >      reference was found in the text
> >
> >   I think you can simply remove this reference.
> >
> >
> >   ** Downref: Normative reference to an Informational RFC: RFC 4026
> >
> >   You can move this reference to be Informative consistent with the
> >   reference to RFC 4110.
> >
> > ---
> >
> > Section 1
> >
> > OLD
> >    If approved, this document obsoletes [RFC8049].  The changes are a
> >    series of small fixes to the YANG module, and some clarifications to
> >    the text.
> >
> >    The following changes were made:
> >
> >    o  First change
> >
> >    o  ...
> >
> >    o  Last change
> > NEW
> >    If approved, this document obsoletes [RFC8049].  The changes are a
> >    series of small fixes to the YANG module, and some clarifications to
> >    the text.  The changes are listed in Section 1.4.
> > END
> >
> > ---
> >
> > Section 5
> >
> > OLD
> >    The model is
> >    intended to be used in the way that the network operator's system is
> >    the server and the customer's system is the client.
> > NEW
> >    The model is
> >    intended to be used in a mode where the network operator's system is
> >    the server and the customer's system is the client.
> > END
> >
> > ---
> >
> > Section 6.3
> >
> > OLD
> >    A particular location or a set of locations must be
> >    associated with each site.
> > NEW
> >    Each site is associated with one or more location.
> > END
> >
> > ---
> >
> > Section 6.12.2.2
> >
> > OLD
> >    o  direction: used to specify the direction which qos profile is
> >       applied to.  Our proposed model supports "Site-to-WAN" direction,
> >       "WAN-to-Site"direction and "both" direction.  By default, "both"
> >       direction is used.
> > NEW
> >    o  direction: used to specify the direction to which the qos profile
> >       is applied.  This model supports three direction settings:
> >       "Site-to-WAN", "WAN-to-Site", and "both".  By default, the "both"
> >       direction value is used.
> > END
> >
> > ---
> >
> > Section 11
> >
> > OLD
> >    This document adds a new YANG module name in the "YANG Module Names"
> >    registry [RFC7950]:
> >
> >            Name: ietf-l3vpn-svc
> >            Namespace: urn:ietf:params:xml:ns:yang:ietf-l3vpn-svc
> >            Prefix: l3vpn-svc
> >            Reference: RFC 8049
> > NEW
> >    IANA has recorded a YANG module name in the "YANG Module Names"
> >    registry [RFC7950] as follows:
> >
> >            Name: ietf-l3vpn-svc
> >            Namespace: urn:ietf:params:xml:ns:yang:ietf-l3vpn-svc
> >            Prefix: l3vpn-svc
> >            Reference: RFC 8049
> >
> >    IANA is requested to update this registry to reference this document
> >    on publication as an RFC.
> > END
> >
> > _______________________________________________
> > L3sm mailing list
> > L3sm@ietf.org
> > https://www.ietf.org/mailman/listinfo/l3sm
> 
> _______________________________________________
> L3sm mailing list
> L3sm@ietf.org
> https://www.ietf.org/mailman/listinfo/l3sm


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From: Qin Wu <bill.wu@huawei.com>
To: "adrian@olddog.co.uk" <adrian@olddog.co.uk>, "l3sm@ietf.org" <l3sm@ietf.org>, "draft-wu-l3sm-rfc8049bis@ietf.org" <draft-wu-l3sm-rfc8049bis@ietf.org>
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From: Qin Wu <bill.wu@huawei.com>
To: "adrian@olddog.co.uk" <adrian@olddog.co.uk>, "l3sm@ietf.org" <l3sm@ietf.org>, "draft-wu-l3sm-rfc8049bis@ietf.org" <draft-wu-l3sm-rfc8049bis@ietf.org>
Thread-Topic: [L3sm] Shepherd review of draft-wu-l3sm-rfc8049bis-02.txt
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Subject: Re: [L3sm] Shepherd review of draft-wu-l3sm-rfc8049bis-02.txt
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From: Qin Wu <bill.wu@huawei.com>
To: David Ball <daviball@cisco.com>, "l3sm@ietf.org" <l3sm@ietf.org>
CC: Stephane Litkowski <stephane.litkowski@orange.com>, Kenichi Ogaki <ke-oogaki@kddi.com>, "adrian@olddog.co.uk" <adrian@olddog.co.uk>
Thread-Topic: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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Date: Mon, 21 Aug 2017 06:47:39 +0000
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Subject: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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--_000_B8F9A780D330094D99AF023C5877DABA9AAB78D5nkgeml513mbxchi_--


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--_000_B8F9A780D330094D99AF023C5877DABA9AABA8A4nkgeml513mbxchi_--


From nobody Tue Aug 22 03:23:49 2017
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From: "Ogaki, Kenichi" <ke-oogaki@kddi.com>
To: "'Qin Wu'" <bill.wu@huawei.com>, "'David Ball'" <daviball@cisco.com>, <l3sm@ietf.org>
Cc: "'Stephane Litkowski'" <stephane.litkowski@orange.com>, <adrian@olddog.co.uk>
References: <B8F9A780D330094D99AF023C5877DABA9AA5D7A2@nkgeml513-mbx.china.huawei.com> <c76328ad-b71e-b2a3-92a4-b02beac2be7d@cisco.com> <B8F9A780D330094D99AF023C5877DABA9AABA8A4@nkgeml513-mbx.china.huawei.com>
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Date: Tue, 22 Aug 2017 19:13:41 +0900
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Archived-At: <https://mailarchive.ietf.org/arch/msg/l3sm/9d-YKqlmw8JBPiB-P0DK2mV4lKU>
Subject: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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Hi Qin,

>      2. For the connection addresses, the provider's IP address/mask:

As for dhcp related provider-addresses and the masks, these are not what =
SP provides, but the subnet which the customer requests to specify the =
leased address subnet. Then, these must be configurable.

Thanks,
Kenichi

-----Original Message-----
From: L3sm [mailto:l3sm-bounces@ietf.org] On Behalf Of Qin Wu
Sent: Monday, August 21, 2017 5:39 PM
To: David Ball; l3sm@ietf.org
Cc: Stephane Litkowski; Kenichi Ogaki; adrian@olddog.co.uk
Subject: Re: [L3sm] New Version Notification for =
draft-wu-l3sm-rfc8049bis-02.txt

> 11. In accordance with the clarified scope, parts of the model that =
correspond

>       with information provided by the SP need to be marked with =
"config false".

>       I've identified the following, but there might be more.

>      1. The list of profiles of various types (i.e. =
l3vpn-service/vpn-profiles)

>      2. For the connection addresses, the provider's IP address/mask:

>     =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv4/provider-dhcp/provider-address

>     =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv4/provider-dhcp/mask

>     =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv4/dhcp-relay/provider-address

>     =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv4/dhcp-relay/mask

>     =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv4/addresses/provider-address

>     =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv4/addresses/mask

>     =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv6/provider-dhcp/provider-address

>     =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv6/provider-dhcp/mask

>     =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv6/dhcp-relay/provider-address

>     =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv6/dhcp-relay/mask

>     =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv6/addresses/provider-address

>     =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv6/addresses/mask

=20

That sounds reasonable.

[Qin]: One more comment, we can not put =E2=80=98config false=E2=80=99 =
for l3vpn-service/vpn-profiles, since Config true leafrefs MUST NOT =
refer to config false data

This issue was discussed before, see discussion available at:

https://www.ietf.org/mail-archive/web/l3sm/current/msg00683.html




From nobody Wed Aug 23 04:45:06 2017
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Subject: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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On 21/08/2017 09:39, Qin Wu wrote:
>
> > 11. In accordance with the clarified scope, parts of the model that correspond
>
> >       with information provided by the SP need to be marked with "config false".
>
> >       I've identified the following, but there might be more.
>
> >      1. The list of profiles of various types (i.e. l3vpn-service/vpn-profiles)
>
> >      2. For the connection addresses, the provider's IP address/mask:
>
> >     •l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/provider-address
>
> >     •l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/mask
>
> >     •l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/provider-address
>
> >     •l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/mask
>
> >     •l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/provider-address
>
> >     •l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/mask
>
> >     •l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/provider-address
>
> >     •l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/mask
>
> >     •l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/provider-address
>
> >     •l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/mask
>
> >     •l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/addresses/provider-address
>
> >     •l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/addresses/mask
>
> That sounds reasonable.
>
> [Qin]: One more comment, we can not put ‘config false’ for 
> l3vpn-service/vpn-profiles, since Config true leafrefs MUST NOT refer 
> to config false data
>
> This issue was discussed before, see discussion available at:
>
> https://www.ietf.org/mail-archive/web/l3sm/current/msg00683.html
>

Ah yes, I had forgotten that.  Yang doesn't really handle this case - 
the semantics we want are that only the SP (i.e., the server) can modify 
these values, but they still have to respect the constraint embodied in 
the leafref i.e. that the values are not deleted if they are in use.  I 
don't think NACM quite does it, because that is about access control for 
clients, but here it is the server that can change the values.  Having 
said that, adding "nacm:default-deny-write" to 
l3vpn-service/vpn-profiles and everything under it would be a strong 
hint as to the intended behaviour.

     David

-- 
David Ball
<daviball@cisco.com>


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    On 21/08/2017 09:39, Qin Wu wrote:<br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AABA8A4@nkgeml513-mbx.china.huawei.com">
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      <div class="WordSection1">
        <p><span style="color:#1F497D" lang="EN-US">&gt; 11. In
            accordance with the clarified scope, parts of the model that
            correspond<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;       with
            information provided by the SP need to be marked with
            "config false".<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;       I've
            identified the following, but there might be more.<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;      1. The
            list of profiles of various types (i.e.
            l3vpn-service/vpn-profiles)<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;      2. For the
            connection addresses, the provider's IP address/mask:<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     </span><span
            style="color:#1F497D">•<span lang="EN-US">
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/provider-address<o:p></o:p></span></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     </span><span
            style="color:#1F497D">•<span lang="EN-US">
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/mask<o:p></o:p></span></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     </span><span
            style="color:#1F497D">•<span lang="EN-US">
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/provider-address<o:p></o:p></span></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     </span><span
            style="color:#1F497D">•<span lang="EN-US">
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/mask<o:p></o:p></span></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     </span><span
            style="color:#1F497D">•<span lang="EN-US">
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/provider-address<o:p></o:p></span></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     </span><span
            style="color:#1F497D">•<span lang="EN-US">
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/mask<o:p></o:p></span></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     </span><span
            style="color:#1F497D">•<span lang="EN-US">
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/provider-address<o:p></o:p></span></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     </span><span
            style="color:#1F497D">•<span lang="EN-US">
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/mask<o:p></o:p></span></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     </span><span
            style="color:#1F497D">•<span lang="EN-US">
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/provider-address<o:p></o:p></span></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     </span><span
            style="color:#1F497D">•<span lang="EN-US">
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/mask<o:p></o:p></span></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     </span><span
            style="color:#1F497D">•<span lang="EN-US">
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/addresses/provider-address<o:p></o:p></span></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     </span><span
            style="color:#1F497D">•<span lang="EN-US">
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/addresses/mask<o:p></o:p></span></span></p>
        <p><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">That sounds
            reasonable.<o:p></o:p></span></p>
        <p><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">[Qin]: One more comment, we can not put ‘config
            false’ for l3vpn-service/vpn-profiles, since Config true
            leafrefs MUST NOT refer to config false data<o:p></o:p></span></p>
        <p><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">This issue was discussed before, see discussion
            available at:<o:p></o:p></span></p>
        <p><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"><a class="moz-txt-link-freetext" href="https://www.ietf.org/mail-archive/web/l3sm/current/msg00683.html">https://www.ietf.org/mail-archive/web/l3sm/current/msg00683.html</a><o:p></o:p></span></p>
      </div>
    </blockquote>
    <br>
    Ah yes, I had forgotten that.  Yang doesn't really handle this case
    - the semantics we want are that only the SP (i.e., the server) can
    modify these values, but they still have to respect the constraint
    embodied in the leafref i.e. that the values are not deleted if they
    are in use.  I don't think NACM quite does it, because that is about
    access control for clients, but here it is the server that can
    change the values.  Having said that, adding
    "nacm:default-deny-write" to l3vpn-service/vpn-profiles and
    everything under it would be a strong hint as to the intended
    behaviour.<br>
    <br>
        David<br>
    <br>
    <pre class="moz-signature" cols="72">-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com">&lt;daviball@cisco.com&gt;</a></pre>
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To: "Ogaki, Kenichi" <ke-oogaki@kddi.com>, "'Qin Wu'" <bill.wu@huawei.com>, l3sm@ietf.org
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From: David Ball <daviball@cisco.com>
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Subject: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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On 22/08/2017 11:13, Ogaki, Kenichi wrote:

> Hi Qin,
>
>>       2. For the connection addresses, the provider's IP address/mask:
> As for dhcp related provider-addresses and the masks, these are not what SP provides, but the subnet which the customer requests to specify the leased address subnet. Then, these must be configurable.

So you're saying even when DHCP is used, the customer can request that 
addresses will be allocated from a specific subnet?  That's not 
something I've heard of, but ok. :)  These leaves should definitely be 
optional in that case, as the more normal case is that the customer does 
not request a specific subnet.  Also this use case needs to be mentioned 
in the description for those leaves.

     David

>
> Thanks,
> Kenichi
>
> -----Original Message-----
> From: L3sm [mailto:l3sm-bounces@ietf.org] On Behalf Of Qin Wu
> Sent: Monday, August 21, 2017 5:39 PM
> To: David Ball; l3sm@ietf.org
> Cc: Stephane Litkowski; Kenichi Ogaki; adrian@olddog.co.uk
> Subject: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
>
>> 11. In accordance with the clarified scope, parts of the model that correspond
>>        with information provided by the SP need to be marked with "config false".
>>        I've identified the following, but there might be more.
>>       1. The list of profiles of various types (i.e. l3vpn-service/vpn-profiles)
>>       2. For the connection addresses, the provider's IP address/mask:
>>      • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/provider-address
>>      • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/mask
>>      • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/provider-address
>>      • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/mask
>>      • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/provider-address
>>      • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/mask
>>      • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/provider-address
>>      • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/mask
>>      • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/provider-address
>>      • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/mask
>>      • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/addresses/provider-address
>>      • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/addresses/mask
>   
>
> That sounds reasonable.
>
> [Qin]: One more comment, we can not put ‘config false’ for l3vpn-service/vpn-profiles, since Config true leafrefs MUST NOT refer to config false data
>
> This issue was discussed before, see discussion available at:
>
> https://www.ietf.org/mail-archive/web/l3sm/current/msg00683.html
>
>
>

-- 
David Ball
<daviball@cisco.com>


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To: Qin Wu <bill.wu@huawei.com>, "l3sm@ietf.org" <l3sm@ietf.org>
Cc: Stephane Litkowski <stephane.litkowski@orange.com>, Kenichi Ogaki <ke-oogaki@kddi.com>, "adrian@olddog.co.uk" <adrian@olddog.co.uk>
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From: David Ball <daviball@cisco.com>
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Subject: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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Thanks Qin, I think most of the comments are being addressed.  Some 
responses below, I've snipped out the ones where we have agreement.


On 21/08/2017 07:47, Qin Wu wrote:
>
> > 2. In section 6.3, I think we can add a statement like: "Multiple locations can be 
> associated
>
> >     with a single site, but a particular location cannot be associated with more 
> than one site."
>
> >    (Personally I don't see the need for this restriction, but this sentence is based 
> on the
>
> >      previous discussion).
>
> We will not be making this change (which seems consistent with your 
> view). A location is a description of a physical location, while a 
> site is part of a service (i.e., a CE). There is no reason to prohibit 
> a service having two co-located CEs. And, of course, two different 
> services could have sites at a single location.
>

[DB]
Ok - in that case, for clarity, can we make the opposite statement: 
"Multiple locations can be associated with a single site; similarly, a 
particular location can be associated with more than one site."

[Note: I came to the conclusion above based on the previous discussion 
about SubVPN, where you said site-network-accesses in different sites 
couldn't share physical components because different sites would be 
associated with different locations.  If multiple sites are allowed to 
be associated with the same location, then they could also share some 
physical components, right?]

> > 3. Section 6.3.2.2.1: I don't think we concluded on whether or not there is a 
> valid use
>
> >    case whereby only IPv6 link-local addresses are used for the site-network-access IP
>
> >    addressing, and no other addresses.  Currently this can't be represented in the
>
> >    model - should it be?  If so, then a sixth option for address-allocation-type 
> needs to
>
> >    be added, for "link-local-only".  Otherwise, we can ignore it.
>
> We think this is covered under "static-address".
>
> If a need for a further classification it can be added in the future.
>

[DB]
Ok

> > 9. In section 6.12.2.2, the second paragraph needs to be updated (or
>
> >     deleted?) now that you have added the "direction" leaf.
>
> We don't believe there is anything actually incorrect about the 
> current text.
>

[DB]
Ok, in that case I don't understand it. :)  Suppose there is a 
provider-managed connection with a qos-profile, and the direction in the 
qos profile is set to Site-to-WAN.  The second paragraph says: "the 
provider should ensure scheduling according to the requested policy in 
both traffic directions", but the description of the direction says: 
"used to specify the direction which qos profile is applied to".  Since 
the direction is Site-to-WAN in this example, this means the profile 
would only be applied in that direction, not in both directions.  That 
seems to contradict the previous text that says it should be applied in 
both directions?

> > 12. The value carried in the svc-mtu leaf is now described more clearly, but its 
> intended
>
> >     use is still unclear, at least to me.  Would something like the following be 
> correct?  If
>
> >     not, what is the correct expression of how to interpret this leaf?
>
> >    "For a given VPN service, the service provider may discard (or for IPv4, may fragment)
>
> >     packets that are longer than the smallest svc-mtu across all 
> site-network-accesses for
>
> >     all sites in the VPN."
>
> We think that SPs are used to the concept of link MTU. svc-mtu 
> modifies the link MTU for the site-access links within the scope of a 
> particular service. We think that an SP will know exactly how to 
> handle packets that exceed MTU values
>

[DB]
Ok, so the intent is that this is just local to the 
site-network-access.  I.e. we could say: "Packets transmitted over the 
site-network-access that are longer than the svc-mtu may be discarded 
(or for IPv4, fragmented)."

> > 13. In the new filters container, there is a list of filters indexed by type (ipv4, 
> ipv6,
>
> >     lan-tag, or vpn-policy-filter-type).  Each filter contains a leaf-list of IPv4 
> prefixes,
>
> >     a leaf-list of ipv6 prefixes and a leaf-list of lan-tags.  Is the intent that the 
> contents
>
> >     of the filter matches the type?  There is nothing to enforce that currently 
> - should
>
> >     there be a "when" statement for each leaf-list, to restrict it to only the case
>
> >     where the type is appropriate (e.g. the ipv4-lan-prefix leaf-list would have
>
> >     "when ../type = ipv4")?
>
> >     I don't really understand what this new filter list achieves over having a single
>
> >     filter that could contain a mix of ipv4 prefixes, ipv6 prefixes and lan-tags.  What's
>
> >     the advantage of 3 filters each containing a single type over one filter 
> containing
>
> >     all three types?
>
> RFC 8049 allowed multiple filters of any one type, but not a mix of 
> filters of different types. That's now fixed.
>

[DB]
Right, I was comparing to the previous version of 8049bis rather than to 
RFC8049 (which I agree did not allow a mix of prefixes and LAN tags).

With the new version, you could have data like this:

<filters>
   <filter>
     <type>lan</type>
<ipv4-lan-prefix>10.0.0.0/24</ipv4-lan-prefix>  // IPv4 prefix specified 
even though type is lan
   </filter>
   <filter>
     <type>ipv4</type>
     <ipv6-lan-prefix>10::0/64</ipv6-lan-prefix>  // IPv6 prefix and lan 
tag specified even though type is ipv4
     <lan-tag>foo</lan-tag>
   </filter>
</filters>

I think the aim could be achieved with a single filter that contains 
leaf-lists for IPv4, Ipv6 and lan tags, i.e.:

container filter {
   leaf-list ipv4-lan-prefix { type inet:ipv4-prefix; }
   leaf-list ipv6-lan-prefix { type inet:ipv6-prefix; }
   leaf-list lan-tag { type string; }
}

This allows full flexibility, i.e. a filter can have zero or more IPv4 
prefixes, zero or more IPv6 prefixes and zero or more LAN tags.

> > 14. As no-one can remember why BFD can only be specified on site-network-accesses
>
> >    and not on sites, I suggest allowing both options - i.e. move the "oam" 
> container from
>
> >    "grouping site-attachment-ip-connection" to "grouping site-routing"; or better 
> still,
>
> >     move it to its own grouping, and use that grouping in both site-top-level-cfg and
>
> >    site-network-access-top-level-cfg.
>
> While this seems to offer a reduction in configuration in some cases 
> while still allowing the detailed configuration, we don't believe 
> there is much of a saving and don't think this change needs to be made.
>

[DB]
Ok.

>
> > 15. For the site-network-access connection addressing, ip-connection/ipv4/address-
>
> >   allocation-type is optional with no default, but 
> ip-connection/ipv6/address-allocation-
>
> >    type has a default defined (static-addressing).  This means it's impossible to 
> have a
>
> >   site-network-access that only uses IPv4 addressing.  I think the 
> default should be
>
> >    deleted in the IPv6 case, so that an IPv4-only site-network-access could be
>
> >    represented by simply not setting the IPv6 address-allocation-type.
>
> Good catch, to get consistent with original RFC8049, I would propose 
> to add the default for ipv4-only site-network-access as well.
>
> Note that we use "feature" for both ipv4 case and ipv6 case.
>

[DB]
Using "feature" doesn't solve the problem, since that turns IPv4 or IPv6 
on or off for every service.  However, the SP might have some IPv4-only 
services and some IPv6-only services.  So, they need to advertise both 
features, but they also need a way to not specify an IPv6 connection 
address for the IPv4-only services, and to not specify an IPv4 
connection address for the IPv6-only services.
So, I believe the best solution is to delete the default for the 
address-allocation-type in both cases.


     David


> Thanks for your time and effort.
>
> Qin
>
> On 09/08/2017 11:40, Qin Wu wrote:
>
>     Here is the update to draft-wu-l3sm-rfc8049bis-02 based on
>     additional discussion on the list.
>
>     https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt
>
>     Thank David for additional comments. Thank Design team to help
>     address these comments.
>
>     The main changes include:
>
>     1.Clarify the rational of the model in the section 5 based on
>     David's comment.
>
>     2.Add multi-filter and multi-VPN per entry support for VPN policy.
>
>     3.Modify description for svc-input-bandwidth leaf and svc-output-
>
>     Bandwidth leaf to address inconsistency issue with the text in
>     section 6.12.1.
>
>     4. Add text to clarify the way to achieve Per-VPN QoS policy.
>
>     5. Remove address-scope-type since there is no common
>     understanding on this.
>
>     6. Modify the description of autonomous-system under container
>     “BGP” to address David's comment on AS.
>
>     Regarding provider address and mask to the model for the DHCP and
>     DHCP relay cases, talking with design team members,
>
>     We believe these parameters are the one requested by Customer to
>     Provider and therefore we keep it in the model.
>
>     Regarding Number of BGP sessions, eBGP multihop between loopbacks
>     and other similar issue, The design team agreed that it is not
>
>     reasonable to enumerate all the cases this models doesn't support.
>     The current text has been clear about this.
>
>     We believe that we have address all the comments. Thanks!
>
>     -Qin
>
>     -----邮件原件-----
>
>     发件人: internet-drafts@ietf.org <mailto:internet-drafts@ietf.org>
>     [mailto:internet-drafts@ietf.org]
>
>     发送时间: 2017年8月9日18:20
>
>     收件人: Qin Wu; Luis Tomotaki; Kenichi Ogaki; Stephane Litkowski
>
>     主题: New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
>
>     A new version of I-D, draft-wu-l3sm-rfc8049bis-02.txt has been
>     successfully submitted by Qin Wu and posted to the IETF repository.
>
>     Name:            draft-wu-l3sm-rfc8049bis
>
>     Revision: 02
>
>     Title:           YANG Data Model for L3VPN Service Delivery
>
>     Document date:   2017-08-09
>
>     Group:           Individual Submission
>
>     Pages:           181
>
>     URL:
>     https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt
>
>     Status: https://datatracker.ietf.org/doc/draft-wu-l3sm-rfc8049bis/
>
>     Htmlized: https://tools.ietf.org/html/draft-wu-l3sm-rfc8049bis-02
>
>     Htmlized:
>     https://datatracker.ietf.org/doc/html/draft-wu-l3sm-rfc8049bis-02
>
>     Diff: https://www.ietf.org/rfcdiff?url2=draft-wu-l3sm-rfc8049bis-02
>
>     Abstract:
>
>        This document defines a YANG data model that can be used for
>
>        communication between customers and network operators and to
>     deliver
>
>        a Layer 3 provider-provisioned VPN service.  This document is
>     limited
>
>        to BGP PE-based VPNs as described in RFCs 4026, 4110, and
>     4364.  This
>
>        model is intended to be instantiated at the management system to
>
>        deliver the overall service.  It is not a configuration model to be
>
>        used directly on network elements.  This model provides an
>     abstracted
>
>        view of the Layer 3 IP VPN service configuration components. 
>     It will
>
>        be up to the management system to take this model as input and use
>
>        specific configuration models to configure the different network
>
>        elements to deliver the service.  How the configuration of network
>
>        elements is done is out of scope for this document.
>
>        If approved, this document obsoletes RFC 8049.  The changes are a
>
>        series of small fixes to the YANG module, and some
>     clarifications to
>
>        the text.
>
>     Please note that it may take a couple of minutes from the time of
>     submission until the htmlized version and diff are available at
>     tools.ietf.org.
>
>     The IETF Secretariat
>
>     _______________________________________________
>
>     L3sm mailing list
>
>     L3sm@ietf.org <mailto:L3sm@ietf.org>
>
>     https://www.ietf.org/mailman/listinfo/l3sm
>
>
>
> -- 
> David Ball
> <daviball@cisco.com> <mailto:daviball@cisco.com>

-- 
David Ball
<daviball@cisco.com>


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    <p><font face="Helvetica, Arial, sans-serif">Thanks Qin, I think
        most of the comments are being addressed.  Some responses below,
        I've snipped out the ones where we have agreement.</font><br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 21/08/2017 07:47, Qin Wu wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AAB78D5@nkgeml513-mbx.china.huawei.com">
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      <div class="WordSection1"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span>
        <p><span style="color:#1F497D" lang="EN-US">&gt; 2. In section
            6.3, I think we can add a statement like: "Multiple
            locations can be associated<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     with a
            single site, but a particular location cannot be associated
            with more than one site."<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    (Personally
            I don't see the need for this restriction, but this sentence
            is based on the<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;      previous
            discussion).<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">We will not be
            making this change (which seems consistent with your view).
            A location is a description of a physical location, while a
            site is part of a service (i.e., a CE). There is no reason
            to prohibit a service having two co-located CEs. And, of
            course, two different services could have sites at a single
            location.</span></p>
      </div>
    </blockquote>
    <br>
    [DB]<br>
    Ok - in that case, for clarity, can we make the opposite statement:
    "Multiple locations can be associated with a single site; similarly,
    a particular location can be associated with more than one site."<br>
    <br>
    [Note: I came to the conclusion above based on the previous
    discussion about SubVPN, where you said site-network-accesses in
    different sites couldn't share physical components because different
    sites would be associated with different locations.  If multiple
    sites are allowed to be associated with the same location, then they
    could also share some physical components, right?]<br>
    <br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AAB78D5@nkgeml513-mbx.china.huawei.com">
      <div class="WordSection1">
        <p><span style="color:#1F497D" lang="EN-US">&gt; 3. Section
            6.3.2.2.1: I don't think we concluded on whether or not
            there is a valid use<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    case whereby
            only IPv6 link-local addresses are used for the
            site-network-access IP<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    addressing,
            and no other addresses.  Currently this can't be represented
            in the<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    model -
            should it be?  If so, then a sixth option for
            address-allocation-type needs to<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    be added,
            for "link-local-only".  Otherwise, we can ignore it.<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">We think this is
            covered under "static-address".<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">If a need for a
            further classification it can be added in the future.</span></p>
      </div>
    </blockquote>
    <br>
    [DB]<br>
    Ok<br>
    <br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AAB78D5@nkgeml513-mbx.china.huawei.com">
      <div class="WordSection1">
        <p><span style="color:#1F497D" lang="EN-US"><o:p></o:p></span></p>
        <span style="color:#1F497D" lang="EN-US"><o:p></o:p></span><span
          style="color:#1F497D" lang="EN-US"><o:p></o:p></span><span
          style="color:#1F497D" lang="EN-US"><o:p></o:p></span>
        <p><span style="color:#1F497D" lang="EN-US">&gt; 9. In section
            6.12.2.2, the second paragraph needs to be updated (or<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     deleted?)
            now that you have added the "direction" leaf.<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">We don't believe
            there is anything actually incorrect about the current text.</span></p>
      </div>
    </blockquote>
    <br>
    [DB]<br>
    Ok, in that case I don't understand it. :)  Suppose there is a
    provider-managed connection with a qos-profile, and the direction in
    the qos profile is set to Site-to-WAN.  The second paragraph says:
    "the provider should ensure scheduling according to the requested
    policy in both traffic directions", but the description of the
    direction says: "used to specify the direction which qos profile is
    applied to".  Since the direction is Site-to-WAN in this example,
    this means the profile would only be applied in that direction, not
    in both directions.  That seems to contradict the previous text that
    says it should be applied in both directions?<br>
    <br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AAB78D5@nkgeml513-mbx.china.huawei.com">
      <div class="WordSection1">
        <p><span style="color:#1F497D" lang="EN-US"><o:p></o:p></span></p>
        <span style="color:#1F497D" lang="EN-US">&gt; 12. The value
          carried in the svc-mtu leaf is now described more clearly, but
          its intended<o:p></o:p></span>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     use is
            still unclear, at least to me.  Would something like the
            following be correct?  If<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     not, what
            is the correct expression of how to interpret this leaf?<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    "For a given
            VPN service, the service provider may discard (or for IPv4,
            may fragment)<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     packets
            that are longer than the smallest svc-mtu across all
            site-network-accesses for<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     all sites
            in the VPN."<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">We think that SPs
            are used to the concept of link MTU. svc-mtu modifies the
            link MTU for the site-access links within the scope of a
            particular service. We think that an SP will know exactly
            how to handle packets that exceed MTU values</span></p>
      </div>
    </blockquote>
    <br>
    [DB]<br>
    Ok, so the intent is that this is just local to the
    site-network-access.  I.e. we could say: "Packets transmitted over
    the site-network-access that are longer than the svc-mtu may be
    discarded (or for IPv4, fragmented)."<br>
    <br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AAB78D5@nkgeml513-mbx.china.huawei.com">
      <div class="WordSection1">
        <p><span style="color:#1F497D" lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt; 13. In the new
            filters container, there is a list of filters indexed by
            type (ipv4, ipv6,<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     lan-tag, or
            vpn-policy-filter-type).  Each filter contains a leaf-list
            of IPv4 prefixes,<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     a leaf-list
            of ipv6 prefixes and a leaf-list of lan-tags.  Is the intent
            that the contents<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     of the
            filter matches the type?  There is nothing to enforce that
            currently - should<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     there be a
            "when" statement for each leaf-list, to restrict it to only
            the case<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     where the
            type is appropriate (e.g. the ipv4-lan-prefix leaf-list
            would have
            <o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     "when
            ../type = ipv4")?<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     I don't
            really understand what this new filter list achieves over
            having a single<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     filter that
            could contain a mix of ipv4 prefixes, ipv6 prefixes and
            lan-tags.  What's<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     the
            advantage of 3 filters each containing a single type over
            one filter containing<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     all three
            types?<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">RFC 8049 allowed
            multiple filters of any one type, but not a mix of filters
            of different types. That's now fixed.</span></p>
      </div>
    </blockquote>
    <br>
    [DB]<br>
    Right, I was comparing to the previous version of 8049bis rather
    than to RFC8049 (which I agree did not allow a mix of prefixes and
    LAN tags).<br>
    <br>
    With the new version, you could have data like this:<br>
    <br>
    <tt>&lt;filters&gt;</tt><tt><br>
    </tt><tt>  &lt;filter&gt;</tt><tt><br>
    </tt><tt>    &lt;type&gt;lan&lt;/type&gt;</tt><tt><br>
    </tt><tt>   
      &lt;ipv4-lan-prefix&gt;10.0.0.0/24&lt;/ipv4-lan-prefix&gt;  //
      IPv4 prefix specified even though type is lan</tt><tt><br>
    </tt><tt>  &lt;/filter&gt;</tt><tt><br>
    </tt><tt>  &lt;filter&gt;</tt><tt><br>
    </tt><tt>
          &lt;type&gt;ipv4&lt;/type&gt;</tt><tt><br>
    </tt><tt>
          &lt;ipv6-lan-prefix&gt;10::0/64&lt;/ipv6-lan-prefix&gt;  //
      IPv6 prefix and lan tag specified even though type is ipv4</tt><tt><br>
    </tt><tt>    &lt;lan-tag&gt;foo&lt;/lan-tag&gt;</tt><tt><br>
    </tt><tt>
        &lt;/filter&gt;</tt><tt><br>
    </tt><tt>&lt;/filters&gt;</tt><br>
    <br>
    I think the aim could be achieved with a single filter that contains
    leaf-lists for IPv4, Ipv6 and lan tags, i.e.:<br>
    <br>
    <tt>container filter {</tt><tt><br>
    </tt><tt>  leaf-list ipv4-lan-prefix { type inet:ipv4-prefix; }</tt><tt><br>
    </tt><tt>  leaf-list ipv6-lan-prefix { type inet:ipv6-prefix; }</tt><tt><br>
    </tt><tt>  leaf-list lan-tag { type string; }</tt><tt><br>
    </tt><tt>}</tt><br>
    <br>
    This allows full flexibility, i.e. a filter can have zero or more
    IPv4 prefixes, zero or more IPv6 prefixes and zero or more LAN tags.<br>
    <br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AAB78D5@nkgeml513-mbx.china.huawei.com">
      <div class="WordSection1">
        <p><span style="color:#1F497D" lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt; 14. As no-one
            can remember why BFD can only be specified on
            site-network-accesses<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    and not on
            sites, I suggest allowing both options - i.e. move the "oam"
            container from<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    "grouping
            site-attachment-ip-connection" to "grouping site-routing";
            or better still,<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     move it to
            its own grouping, and use that grouping in both
            site-top-level-cfg and
            <o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    
            site-network-access-top-level-cfg.<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">While this seems to
            offer a reduction in configuration in some cases while still
            allowing the detailed configuration, we don't believe there
            is much of a saving and don't think this change needs to be
            made.</span></p>
      </div>
    </blockquote>
    <br>
    [DB]<br>
    Ok.<br>
    <br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AAB78D5@nkgeml513-mbx.china.huawei.com">
      <div class="WordSection1">
        <p><span style="color:#1F497D" lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"><o:p><br>
            </o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt; 15. For the
            site-network-access connection addressing,
            ip-connection/ipv4/address-<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;   
            allocation-type is optional with no default, but
            ip-connection/ipv6/address-allocation-<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    type has a
            default defined (static-addressing).  This means it's
            impossible to have a<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;   
            site-network-access that only uses IPv4 addressing.  I think
            the default should be<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    deleted in
            the IPv6 case, so that an IPv4-only site-network-access
            could be<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    represented
            by simply not setting the IPv6 address-allocation-type.<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">Good catch, to get
            consistent with original RFC8049, I would propose to add the
            default for ipv4-only site-network-access as well.<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">Note that we use
            "feature" for both ipv4 case and ipv6 case.</span></p>
      </div>
    </blockquote>
    <br>
    [DB]<br>
    Using "feature" doesn't solve the problem, since that turns IPv4 or
    IPv6 on or off for every service.  However, the SP might have some
    IPv4-only services and some IPv6-only services.  So, they need to
    advertise both features, but they also need a way to not specify an
    IPv6 connection address for the IPv4-only services, and to not
    specify an IPv4 connection address for the IPv6-only services.<br>
    So, I believe the best solution is to delete the default for the
    address-allocation-type in both cases.<br>
    <br>
    <br>
        David<br>
    <br>
    <br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AAB78D5@nkgeml513-mbx.china.huawei.com">
      <div class="WordSection1">
        <p><span style="color:#1F497D" lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">Thanks for your time
            and effort.<o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">Qin<o:p></o:p></span></p>
        <div>
          <p class="MsoNormal"><span lang="EN-US">On 09/08/2017 11:40,
              Qin Wu wrote:<o:p></o:p></span></p>
        </div>
        <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
          <pre><span lang="EN-US">Here is the update to draft-wu-l3sm-rfc8049bis-02 based on additional discussion on the list.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"><a href="https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt" moz-do-not-send="true">https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US">Thank David for additional comments. Thank Design team to help address these comments.<o:p></o:p></span></pre>
          <pre><span lang="EN-US">The main changes include:<o:p></o:p></span></pre>
          <pre><span lang="EN-US">1.Clarify the rational of the model in the section 5 based on David's comment.  <o:p></o:p></span></pre>
          <pre><span lang="EN-US">2.Add multi-filter and multi-VPN per entry support for VPN policy.  <o:p></o:p></span></pre>
          <pre><span lang="EN-US">3.Modify description for svc-input-bandwidth leaf and svc-output- <o:p></o:p></span></pre>
          <pre><span lang="EN-US">Bandwidth leaf to address inconsistency issue with the text in section 6.12.1. <o:p></o:p></span></pre>
          <pre><span lang="EN-US">4. Add text to clarify the way to achieve Per-VPN QoS policy.<o:p></o:p></span></pre>
          <pre><span lang="EN-US">5. Remove address-scope-type since there is no common understanding on this.<o:p></o:p></span></pre>
          <pre><span lang="EN-US">6. Modify the description of autonomous-system under container “BGP” to address David's comment on AS.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"><o:p> </o:p></span></pre>
          <pre><span lang="EN-US">Regarding provider address and mask to the model for the DHCP and DHCP relay cases, talking with design team members,<o:p></o:p></span></pre>
          <pre><span lang="EN-US">We believe these parameters are the one requested by Customer to Provider and therefore we keep it in the model.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"><o:p> </o:p></span></pre>
          <pre><span lang="EN-US">Regarding Number of BGP sessions, eBGP multihop between loopbacks and other similar issue, The design team agreed that it is not<o:p></o:p></span></pre>
          <pre><span lang="EN-US">reasonable to enumerate all the cases this models doesn't support. The current text has been clear about this.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"><o:p> </o:p></span></pre>
          <pre><span lang="EN-US">We believe that we have address all the comments. Thanks!<o:p></o:p></span></pre>
          <pre><span lang="EN-US"><o:p> </o:p></span></pre>
          <pre><span lang="EN-US">-Qin<o:p></o:p></span></pre>
          <pre><span lang="EN-US">-----</span>邮件原件<span lang="EN-US">-----<o:p></o:p></span></pre>
          <pre>发件人<span lang="EN-US">: <a href="mailto:internet-drafts@ietf.org" moz-do-not-send="true">internet-drafts@ietf.org</a> [<a href="mailto:internet-drafts@ietf.org" moz-do-not-send="true">mailto:internet-drafts@ietf.org</a>] <o:p></o:p></span></pre>
          <pre>发送时间<span lang="EN-US">: 2017</span>年<span lang="EN-US">8</span>月<span lang="EN-US">9</span>日<span lang="EN-US"> 18:20<o:p></o:p></span></pre>
          <pre>收件人<span lang="EN-US">: Qin Wu; Luis Tomotaki; Kenichi Ogaki; Stephane Litkowski<o:p></o:p></span></pre>
          <pre>主题<span lang="EN-US">: New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt<o:p></o:p></span></pre>
          <pre><span lang="EN-US"><o:p> </o:p></span></pre>
          <pre><span lang="EN-US"><o:p> </o:p></span></pre>
          <pre><span lang="EN-US">A new version of I-D, draft-wu-l3sm-rfc8049bis-02.txt has been successfully submitted by Qin Wu and posted to the IETF repository.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"><o:p> </o:p></span></pre>
          <pre><span lang="EN-US">Name:            draft-wu-l3sm-rfc8049bis<o:p></o:p></span></pre>
          <pre><span lang="EN-US">Revision: 02<o:p></o:p></span></pre>
          <pre><span lang="EN-US">Title:           YANG Data Model for L3VPN Service Delivery<o:p></o:p></span></pre>
          <pre><span lang="EN-US">Document date:   2017-08-09<o:p></o:p></span></pre>
          <pre><span lang="EN-US">Group:           Individual Submission<o:p></o:p></span></pre>
          <pre><span lang="EN-US">Pages:           181<o:p></o:p></span></pre>
          <pre><span lang="EN-US">URL:            <a href="https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt" moz-do-not-send="true">https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US">Status:         <a href="https://datatracker.ietf.org/doc/draft-wu-l3sm-rfc8049bis/" moz-do-not-send="true">https://datatracker.ietf.org/doc/draft-wu-l3sm-rfc8049bis/</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US">Htmlized:       <a href="https://tools.ietf.org/html/draft-wu-l3sm-rfc8049bis-02" moz-do-not-send="true">https://tools.ietf.org/html/draft-wu-l3sm-rfc8049bis-02</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US">Htmlized:       <a href="https://datatracker.ietf.org/doc/html/draft-wu-l3sm-rfc8049bis-02" moz-do-not-send="true">https://datatracker.ietf.org/doc/html/draft-wu-l3sm-rfc8049bis-02</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US">Diff:           <a href="https://www.ietf.org/rfcdiff?url2=draft-wu-l3sm-rfc8049bis-02" moz-do-not-send="true">https://www.ietf.org/rfcdiff?url2=draft-wu-l3sm-rfc8049bis-02</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US"><o:p> </o:p></span></pre>
          <pre><span lang="EN-US">Abstract:<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   This document defines a YANG data model that can be used for<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   communication between customers and network operators and to deliver<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   a Layer 3 provider-provisioned VPN service.  This document is limited<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   to BGP PE-based VPNs as described in RFCs 4026, 4110, and 4364.  This<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   model is intended to be instantiated at the management system to<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   deliver the overall service.  It is not a configuration model to be<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   used directly on network elements.  This model provides an abstracted<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   view of the Layer 3 IP VPN service configuration components.  It will<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   be up to the management system to take this model as input and use<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   specific configuration models to configure the different network<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   elements to deliver the service.  How the configuration of network<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   elements is done is out of scope for this document.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"><o:p> </o:p></span></pre>
          <pre><span lang="EN-US">   If approved, this document obsoletes RFC 8049.  The changes are a<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   series of small fixes to the YANG module, and some clarifications to<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   the text.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"><o:p> </o:p></span></pre>
          <pre><span lang="EN-US">                                                                                  <o:p></o:p></span></pre>
          <pre><span lang="EN-US"><o:p> </o:p></span></pre>
          <pre><span lang="EN-US"><o:p> </o:p></span></pre>
          <pre><span lang="EN-US">Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"><o:p> </o:p></span></pre>
          <pre><span lang="EN-US">The IETF Secretariat<o:p></o:p></span></pre>
          <pre><span lang="EN-US"><o:p> </o:p></span></pre>
          <pre><span lang="EN-US">_______________________________________________<o:p></o:p></span></pre>
          <pre><span lang="EN-US">L3sm mailing list<o:p></o:p></span></pre>
          <pre><span lang="EN-US"><a href="mailto:L3sm@ietf.org" moz-do-not-send="true">L3sm@ietf.org</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US"><a href="https://www.ietf.org/mailman/listinfo/l3sm" moz-do-not-send="true">https://www.ietf.org/mailman/listinfo/l3sm</a><o:p></o:p></span></pre>
        </blockquote>
        <p class="MsoNormal"><span lang="EN-US"><br>
            <br>
            <o:p></o:p></span></p>
        <pre><span lang="EN-US">-- <o:p></o:p></span></pre>
        <pre><span lang="EN-US">David Ball<o:p></o:p></span></pre>
        <pre><span lang="EN-US"><a href="mailto:daviball@cisco.com" moz-do-not-send="true">&lt;daviball@cisco.com&gt;</a><o:p></o:p></span></pre>
      </div>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com">&lt;daviball@cisco.com&gt;</a></pre>
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From: Qin Wu <bill.wu@huawei.com>
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Thread-Topic: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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--_000_B8F9A780D330094D99AF023C5877DABA9AACC436nkgeml513mbxchi_--


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To: Qin Wu <bill.wu@huawei.com>, "l3sm@ietf.org" <l3sm@ietf.org>
Cc: Stephane Litkowski <stephane.litkowski@orange.com>, Kenichi Ogaki <ke-oogaki@kddi.com>, "adrian@olddog.co.uk" <adrian@olddog.co.uk>
References: <B8F9A780D330094D99AF023C5877DABA9AA5D7A2@nkgeml513-mbx.china.huawei.com> <c76328ad-b71e-b2a3-92a4-b02beac2be7d@cisco.com> <B8F9A780D330094D99AF023C5877DABA9AABA8A4@nkgeml513-mbx.china.huawei.com> <1823e4d3-c6ff-f3ca-d140-74fc5edba188@cisco.com> <B8F9A780D330094D99AF023C5877DABA9AACC2FE@nkgeml513-mbx.china.huawei.com>
From: David Ball <daviball@cisco.com>
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Date: Thu, 24 Aug 2017 10:32:26 +0100
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Subject: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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On 24/08/2017 01:50, Qin Wu wrote:
>
> [Qin]: Okay, the propose change will look like this:
>
> “
>
> import ietf-netconf-acm {
>
>   prefix nacm;
>
> }
>
> ……
>
> grouping vpn-profile-cfg {
>
>   container valid-provider-identifiers {
>
>    list cloud-identifier {
>
>     if-feature cloud-access;
>
>     key id;
>
>     leaf id {
>
>      type string;
>
>      description
>
>       "Identification of cloud service.
>
>        Local administration meaning.";
>
>     }
>
> nacm:default-deny-write;
>
>     description
>
>     "List for Cloud Identifiers.";
>
>   }
>
>    list encryption-profile-identifier {
>
>     key id;
>
>     leaf id {
>
>      type string;
>
>      description
>
>       "Identification of the SP encryption profile
>
>        to be used. Local administration meaning.";
>
>     }
>
>  nacm:default-deny-write;
>
>     description
>
>     "List for encryption profile identifiers.";
>
>    }
>
>    list qos-profile-identifier {
>
>     key id;
>
>     leaf id {
>
>      type string;
>
>      description
>
>       "Identification of the QoS Profile to be used.
>
>        Local administration meaning.";
>
>    }
>
> nacm:default-deny-write;
>
>     description
>
>     "List for QoS Profile Identifiers.";
>
>    }
>
>    list bfd-profile-identifier {
>
>     key id;
>
>     leaf id {
>
>      type string;
>
>      description
>
>       "Identification of the SP BFD Profile to be used.
>
>        Local administration meaning.";
>
>     }
>
> nacm:default-deny-write;
>
>     description
>
>     "List for BFD profile Identifiers.";
>
>    }
>
>      description
>
>     "Container for Valid Provider Identifies.";
>
>   }
>
>    description
>
>    "Grouping for VPN Profile configuration.";
>
> }
>
> ”
>
> This will get in line with Jan’s proposal as well.
>

If my understanding of RFC 6536 is correct, you need to put it on the 
leaves as well as the lists (it doesn't cascade down the tree like most 
other yang constructs).


     David

-- 
David Ball
<daviball@cisco.com>


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<html>
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    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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    On 24/08/2017 01:50, Qin Wu wrote:<br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AACC2FE@nkgeml513-mbx.china.huawei.com">
      <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">[Qin]:
          Okay, the propose change will look like this:</span><span
          lang="EN-US"><o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">“<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
          lang="EN-US">import ietf-netconf-acm {<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
          lang="EN-US">  prefix nacm;<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
          lang="EN-US">}
          <o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
          lang="EN-US">……<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">grouping vpn-profile-cfg {<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">  container valid-provider-identifiers {<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">   list cloud-identifier {<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    if-feature cloud-access;<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    key id;<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    leaf id {<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">     type string;<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">     description<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">      "Identification of cloud service.<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">       Local administration meaning.";<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    }<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">   
        </span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
          lang="EN-US">nacm:default-deny-write;<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    description<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    "List for Cloud Identifiers.";<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">  }<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">   list encryption-profile-identifier {<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    key id;<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    leaf id {<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">     type string;<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">     description<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">      "Identification of the SP encryption
          profile<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">       to be used. Local administration
          meaning.";<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    }<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">  
        </span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
          lang="EN-US"> nacm:default-deny-write;<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    description<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    "List for encryption profile identifiers.";<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">   }<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">   list qos-profile-identifier {<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    key id;<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    leaf id {<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">     type string;<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">     description<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">      "Identification of the QoS Profile to be
          used.<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">       Local administration meaning.";<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">   }<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">        
        </span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
          lang="EN-US">nacm:default-deny-write;<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    description<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    "List for QoS Profile Identifiers.";<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">   }<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US"><o:p> </o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">   list bfd-profile-identifier {<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    key id;<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    leaf id {<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">     type string;<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">     description<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">      "Identification of the SP BFD Profile to be
          used.<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">       Local administration meaning.";<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    }<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">        
        </span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
          lang="EN-US">nacm:default-deny-write;<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    description<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    "List for BFD profile Identifiers.";<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">   }<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">     description<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">    "Container for Valid Provider Identifies.";<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">  }<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">   description<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">   "Grouping for VPN Profile configuration.";<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">}<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">”<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">This will get in line with Jan’s proposal as
          well.</span></p>
    </blockquote>
    <br>
    If my understanding of RFC 6536 is correct, you need to put it on
    the leaves as well as the lists (it doesn't cascade down the tree
    like most other yang constructs).<br>
    <br>
    <br>
        David<br>
    <br>
    <pre class="moz-signature" cols="72">-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com">&lt;daviball@cisco.com&gt;</a></pre>
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Thanks - more inline with [DB2]:


On 24/08/2017 04:26, Qin Wu wrote:
>
> Thank David for follow up comments. See my reply inline below marked 
> with [Qin-1].
>
> *发件人:*David Ball [mailto:daviball@cisco.com]
> *发送时间:*2017年8月23日20:22
> *收件人:*Qin Wu; l3sm@ietf.org
> *抄送:*Stephane Litkowski; Kenichi Ogaki; adrian@olddog.co.uk
> *主题:*Re: [L3sm] New Version Notification for 
> draft-wu-l3sm-rfc8049bis-02.txt
>
> Thanks Qin, I think most of the comments are being addressed.  Some 
> responses below, I've snipped out the ones where we have agreement.
>
> On 21/08/2017 07:47, Qin Wu wrote:
>
>     > 2. In section 6.3, I think we can add a statement like: "Multiple locations can
>     be associated
>
>     >     with a single site, but a particular location cannot be associated with
>     more than one site."
>
>     >   (Personally I don't see the need for this restriction, but this
>     sentence is based on the
>
>     >      previous discussion).
>
>     We will not be making this change (which seems consistent with
>     your view). A location is a description of a physical location,
>     while a site is part of a service (i.e., a CE). There is no reason
>     to prohibit a service having two co-located CEs. And, of course,
>     two different services could have sites at a single location.
>
>
> [DB]
> Ok - in that case, for clarity, can we make the opposite statement: 
> "Multiple locations can be associated with a single site; similarly, a 
> particular location can be associated with more than one site."
>
> [Qin-1]:The statement we like to put is: Each site is associated with 
> one location or more locations.
>

[DB2] I think we already say that; but it is the converse I would like 
to add, i.e. each location can have one or more sites.

> [Note: I came to the conclusion above based on the previous discussion 
> about SubVPN, where you said site-network-accesses in different sites 
> couldn't share physical components because different sites would be 
> associated with different locations.  If multiple sites are allowed to 
> be associated with the same location, then they could also share some 
> physical components, right?]
>
> [Qin]: Sure, you can use " same-bearer" attribute to express that 
> constraint the relationship between source site-network-access and 
> target site-network-access.
>
>
>
> > 9. In section 6.12.2.2, the second paragraph needs to be updated (or
>
> >     deleted?) now that you have added the "direction" leaf.
>
> We don't believe there is anything actually incorrect about the 
> current text.
>
>
> [DB]
> Ok, in that case I don't understand it. :)  Suppose there is a 
> provider-managed connection with a qos-profile, and the direction in 
> the qos profile is set to Site-to-WAN.  The second paragraph says: 
> "the provider should ensure scheduling according to the requested 
> policy in both traffic directions", but the description of the 
> direction says: "used to specify the direction which qos profile is 
> applied to".  Since the direction is Site-to-WAN in this example, this 
> means the profile would only be applied in that direction, not in both 
> directions.  That seems to contradict the previous text that says it 
> should be applied in both directions?
>
> [Qin-1]: I see your point. I think in case of provider-managed or 
> co-managed connection, QoS profile are applied to both direction based 
> on the second paragraph of section 6.12.2.2, that means the parameter 
> “direction” is set to “both”.
>
> In case of customer-managed connection, QoS profile is applied to the 
> direction from SP network to the customer site, that means the 
> parameter “direction” should be set to “WAN-to-Site”.
>
> That’ why we think there is actually incorrect about the current text. 
> Note that “direction” is just optional parameter in this model.
>
> On the other hand, if we want to enhance the current text, we might 
> consider:
>
> 1.allow direction at network access level to override the parameter in 
> the site level.
>
> 2.Use “direction” condition to replace “provider-managed, co-managed, 
> customer-managed” condition in the text and allow more flexibility to 
> apply QoS profile to appropriate traffic direction.
>
> But I like to talk to the design team for this first.
>

[DB2] Ok - option 2 would be my preference but lets see what others think.

>
> > 12. The value carried in the svc-mtu leaf is now described more 
> clearly, but its intended
>
> >     use is still unclear, at least to me.  Would something like the following be 
> correct?  If
>
> >     not, what is the correct expression of how to interpret this leaf?
>
> >    "For a given VPN service, the service provider may discard (or for IPv4, may fragment)
>
> >     packets that are longer than the smallest svc-mtu across all 
> site-network-accesses for
>
> >     all sites in the VPN."
>
> We think that SPs are used to the concept of link MTU. svc-mtu 
> modifies the link MTU for the site-access links within the scope of a 
> particular service. We think that an SP will know exactly how to 
> handle packets that exceed MTU values
>
>
> [DB]
> Ok, so the intent is that this is just local to the 
> site-network-access.  I.e. we could say: "Packets transmitted over the 
> site-network-access that are longer than the svc-mtu may be discarded 
> (or for IPv4, fragmented)."
>
> [Qin-1]: I would prefer to leave this up to SP to determine how to 
> deal with MTU exceeding, we can not limited only to discard or 
> fragmented, does this make sense?
>

[DB2] Yes - that is why I said "may be discarded" instead of "must be 
discarded".  With my suggested text, it is still up to SP to determine 
how to handle it, but we are providing some warning for the customer.

> > 13. In the new filters container, there is a list of filters indexed by type (ipv4, 
> ipv6,
>
> >     lan-tag, or vpn-policy-filter-type).  Each filter contains a leaf-list of IPv4 
> prefixes,
>
> >     a leaf-list of ipv6 prefixes and a leaf-list of lan-tags.  Is the intent that the 
> contents
>
> >     of the filter matches the type?  There is nothing to enforce that currently 
> - should
>
> >     there be a "when" statement for each leaf-list, to restrict it to only the case
>
> >     where the type is appropriate (e.g. the ipv4-lan-prefix leaf-list would have
>
> >     "when ../type = ipv4")?
>
> >     I don't really understand what this new filter list achieves over having a single
>
> >     filter that could contain a mix of ipv4 prefixes, ipv6 prefixes and lan-tags.  What's
>
> >     the advantage of 3 filters each containing a single type over one filter 
> containing
>
> >     all three types?
>
> RFC 8049 allowed multiple filters of any one type, but not a mix of 
> filters of different types. That's now fixed.
>
>
> [DB]
> Right, I was comparing to the previous version of 8049bis rather than 
> to RFC8049 (which I agree did not allow a mix of prefixes and LAN tags).
>
> [Qin-1]With the old version of RFC8049, you still can have a mix of 
> prefixes and LAN tags, with two entries instead of single entry
>
> “
>
>       <entries>
>
>        <id>ENTRY1</id>
>
>        <filter>
>
>         <lan-tag>LAN1</lan-tag>
>
>        </filter>
>
>        <vpn>
>
>         <vpn-id>VPN2</vpn-id>
>
> <site-role>hub-role</site-role>
>
>        </vpn>
>
>       </entries>
>
>       <entries>
>
>        <id>ENTRY2</id>
>
>        <filter>
>
> <ipv4-lan-prefix>LAN2</ipv4-lan-prefix>
>
>        </filter>
>
>        <vpn>
>
>         <vpn-id>VPN2</vpn-id>
>
> <site-role>any-to-any-role</site-role>
>
>        </vpn>
>
>       </entries>
>
> ”
>
>
> With the new version, you could have data like this:
>
> <filters>
>   <filter>
>     <type>lan</type>
> <ipv4-lan-prefix>10.0.0.0/24</ipv4-lan-prefix> // IPv4 prefix 
> specified even though type is lan
>   </filter>
>   <filter>
>     <type>ipv4</type>
> <ipv6-lan-prefix>10::0/64</ipv6-lan-prefix> // IPv6 prefix and lan tag 
> specified even though type is ipv4
>     <lan-tag>foo</lan-tag>
>   </filter>
> </filters>
>
> [Qin-1]: This can be easily fixed by add when statement, e.g.,
>
> when "derived-from-or-self(../type, 'l3vpn-svc:ipv4')" {
>
>          description
>
>          "Only applies when vpn policy filter is ipv4-lan-prefix.";
>
>         }
>

[DB2] Yes, adding 'when' statements would also work.

>
> I think the aim could be achieved with a single filter that contains 
> leaf-lists for IPv4, Ipv6 and lan tags, i.e.:
>
> container filter {
>   leaf-list ipv4-lan-prefix { type inet:ipv4-prefix; }
>   leaf-list ipv6-lan-prefix { type inet:ipv6-prefix; }
>   leaf-list lan-tag { type string; }
> }
>
> This allows full flexibility, i.e. a filter can have zero or more IPv4 
> prefixes, zero or more IPv6 prefixes and zero or more LAN tags.
>
> [Qin]: Similar to our design team's proposal in the new version, but 
> ipv4 and ipv6 and lan-tag are not of the same type. put them in the 
> same container seems weird,J.
>
> Our proposal follow similar construct proposed for " routing-protocol" 
> list in this model.
>
> > 15. For the site-network-access connection addressing, ip-connection/ipv4/address-
>
> >   allocation-type is optional with no default, but 
> ip-connection/ipv6/address-allocation-
>
> >    type has a default defined (static-addressing).  This means it's impossible to 
> have a
>
> >   site-network-access that only uses IPv4 addressing.  I think the 
> default should be
>
> >    deleted in the IPv6 case, so that an IPv4-only site-network-access could be
>
> >    represented by simply not setting the IPv6 address-allocation-type.
>
> Good catch, to get consistent with original RFC8049, I would propose 
> to add the default for ipv4-only site-network-access as well.
>
> Note that we use "feature" for both ipv4 case and ipv6 case.
>
>
> [DB]
> Using "feature" doesn't solve the problem, since that turns IPv4 or 
> IPv6 on or off for every service.  However, the SP might have some 
> IPv4-only services and some IPv6-only services.  So, they need to 
> advertise both features, but they also need a way to not specify an 
> IPv6 connection address for the IPv4-only services, and to not specify 
> an IPv4 connection address for the IPv6-only services.
> So, I believe the best solution is to delete the default for the 
> address-allocation-type in both cases.
>
> [Qin-1]: I am fine to delete both default values, but
>
> RFC7950 section 7.6.1 said:
>
> "
>
> Note that if the leaf or any of its ancestors has a "when" condition
>
> or "if-feature" expression that evaluates to "false", then the
>
> default value is not in use.
>
> "
>
> To my understanding, if the server doesn’t support one feature or 
> advertise one feature, the default value will not in use.
>
> If the server advertise both features, it doesn’t say default value 
> for each feature MUST be specified.
>
> So if both features can be supported, is there any reason we only 
> specify only IPv6 connection or IPv4 connection?
>

[DB2] The difference is that features apply across the whole server - if 
the ipv4 feature is disabled, then the server cannot support IPv4 at 
all, and there can be *no* services with IPv4.  However, the case I was 
describing is different - in this case, there are some services that 
support IPv4 and some that do not.  For example, the SP might offer an 
IPv4 product, and IPv6 product and a dual-stack product, where the 
dual-stack product is more expensive.  So some customers might choose 
IPv4-only or IPv6-only - or a particular customer might choose a mix of 
ipv4-only and ipv6-only services.  This is why I think the default 
should be deleted in both cases.


     David


>
>     David
>
>
>
> Thanks for your time and effort.
>
> Qin
>
> On 09/08/2017 11:40, Qin Wu wrote:
>
>     Here is the update to draft-wu-l3sm-rfc8049bis-02 based on
>     additional discussion on the list.
>
>     https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt
>
>     Thank David for additional comments. Thank Design team to help
>     address these comments.
>
>     The main changes include:
>
>     1.Clarify the rational of the model in the section 5 based on
>     David's comment.
>
>     2.Add multi-filter and multi-VPN per entry support for VPN policy.
>
>     3.Modify description for svc-input-bandwidth leaf and svc-output-
>
>     Bandwidth leaf to address inconsistency issue with the text in
>     section 6.12.1.
>
>     4. Add text to clarify the way to achieve Per-VPN QoS policy.
>
>     5. Remove address-scope-type since there is no common
>     understanding on this.
>
>     6. Modify the description of autonomous-system under container “BGP”to address David's comment on AS.
>
>     Regarding provider address and mask to the model for the DHCP and
>     DHCP relay cases, talking with design team members,
>
>     We believe these parameters are the one requested by Customer to
>     Provider and therefore we keep it in the model.
>
>     Regarding Number of BGP sessions, eBGP multihop between loopbacks
>     and other similar issue, The design team agreed that it is not
>
>     reasonable to enumerate all the cases this models doesn't support.
>     The current text has been clear about this.
>
>     We believe that we have address all the comments. Thanks!
>
>     -Qin
>
>     -----邮件原件-----
>
>     发件人: internet-drafts@ietf.org <mailto:internet-drafts@ietf.org>
>     [mailto:internet-drafts@ietf.org]
>
>     发送时间: 2017年8月9日18:20
>
>     收件人: Qin Wu; Luis Tomotaki; Kenichi Ogaki; Stephane Litkowski
>
>     主题: New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
>
>     A new version of I-D, draft-wu-l3sm-rfc8049bis-02.txt has been
>     successfully submitted by Qin Wu and posted to the IETF repository.
>
>     Name:            draft-wu-l3sm-rfc8049bis
>
>     Revision: 02
>
>     Title:           YANG Data Model for L3VPN Service Delivery
>
>     Document date:   2017-08-09
>
>     Group:           Individual Submission
>
>     Pages:           181
>
>     URL:
>     https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt
>
>     Status: https://datatracker.ietf.org/doc/draft-wu-l3sm-rfc8049bis/
>
>     Htmlized: https://tools.ietf.org/html/draft-wu-l3sm-rfc8049bis-02
>
>     Htmlized:
>     https://datatracker.ietf.org/doc/html/draft-wu-l3sm-rfc8049bis-02
>
>     Diff: https://www.ietf.org/rfcdiff?url2=draft-wu-l3sm-rfc8049bis-02
>
>     Abstract:
>
>        This document defines a YANG data model that can be used for
>
>        communication between customers and network operators and to
>     deliver
>
>        a Layer 3 provider-provisioned VPN service.  This document is
>     limited
>
>        to BGP PE-based VPNs as described in RFCs 4026, 4110, and
>     4364.  This
>
>        model is intended to be instantiated at the management system to
>
>        deliver the overall service.  It is not a configuration model to be
>
>        used directly on network elements.  This model provides an
>     abstracted
>
>        view of the Layer 3 IP VPN service configuration components. 
>     It will
>
>        be up to the management system to take this model as input and use
>
>        specific configuration models to configure the different network
>
>        elements to deliver the service.  How the configuration of network
>
>        elements is done is out of scope for this document.
>
>        If approved, this document obsoletes RFC 8049.  The changes are a
>
>        series of small fixes to the YANG module, and some
>     clarifications to
>
>        the text.
>
>     Please note that it may take a couple of minutes from the time of
>     submission until the htmlized version and diff are available at
>     tools.ietf.org.
>
>     The IETF Secretariat
>
>     _______________________________________________
>
>     L3sm mailing list
>
>     L3sm@ietf.org <mailto:L3sm@ietf.org>
>
>     https://www.ietf.org/mailman/listinfo/l3sm
>
>
>
>
> -- 
> David Ball
> <daviball@cisco.com> <mailto:daviball@cisco.com>
>
>
>
> -- 
> David Ball
> <daviball@cisco.com> <mailto:daviball@cisco.com>

-- 
David Ball
<daviball@cisco.com>


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    <p><font face="Helvetica, Arial, sans-serif">Thanks - more inline
        with [DB2]:</font><br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 24/08/2017 04:26, Qin Wu wrote:<br>
    </div>
    <blockquote type="cite"
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        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">Thank David for follow up comments. See my
            reply inline below marked with [Qin-1].<o:p></o:p></span></p>
        <div>
          <div style="border:none;border-top:solid #B5C4DF
            1.0pt;padding:3.0pt 0cm 0cm 0cm">
            <p class="MsoNormal"><b><span
                  style="font-size:10.0pt;color:windowtext">发件人<span
                    lang="EN-US">:</span></span></b><span
                style="font-size:10.0pt;color:windowtext" lang="EN-US">
                David Ball [<a class="moz-txt-link-freetext" href="mailto:daviball@cisco.com">mailto:daviball@cisco.com</a>]
                <br>
              </span><b><span style="font-size:10.0pt;color:windowtext">发送时间<span
                    lang="EN-US">:</span></span></b><span
                style="font-size:10.0pt;color:windowtext" lang="EN-US">
                2017</span><span
                style="font-size:10.0pt;color:windowtext">年<span
                  lang="EN-US">8</span>月<span lang="EN-US">23</span>日<span
                  lang="EN-US"> 20:22<br>
                </span><b>收件人<span lang="EN-US">:</span></b><span
                  lang="EN-US"> Qin Wu; <a class="moz-txt-link-abbreviated" href="mailto:l3sm@ietf.org">l3sm@ietf.org</a><br>
                </span><b>抄送<span lang="EN-US">:</span></b><span
                  lang="EN-US"> Stephane Litkowski; Kenichi Ogaki;
                  <a class="moz-txt-link-abbreviated" href="mailto:adrian@olddog.co.uk">adrian@olddog.co.uk</a><br>
                </span><b>主题<span lang="EN-US">:</span></b><span
                  lang="EN-US"> Re: [L3sm] New Version Notification for
                  draft-wu-l3sm-rfc8049bis-02.txt<o:p></o:p></span></span></p>
          </div>
        </div>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p><span
            style="font-family:&quot;Helvetica&quot;,&quot;sans-serif&quot;"
            lang="EN-US">Thanks Qin, I think most of the comments are
            being addressed.  Some responses below, I've snipped out the
            ones where we have agreement.</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <div>
          <p class="MsoNormal"><span lang="EN-US">On 21/08/2017 07:47,
              Qin Wu wrote:<o:p></o:p></span></p>
        </div>
        <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
          <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"> </span><span
              lang="EN-US">
              <o:p></o:p></span></p>
          <p><span style="color:#1F497D" lang="EN-US">&gt; 2. In section
              6.3, I think we can add a statement like: "Multiple
              locations can be associated</span><span lang="EN-US"><o:p></o:p></span></p>
          <p><span style="color:#1F497D" lang="EN-US">&gt;     with a
              single site, but a particular location cannot be
              associated with more than one site."</span><span
              lang="EN-US"><o:p></o:p></span></p>
          <p><span style="color:#1F497D" lang="EN-US">&gt;   
              (Personally I don't see the need for this restriction, but
              this sentence is based on the</span><span lang="EN-US"><o:p></o:p></span></p>
          <p><span style="color:#1F497D" lang="EN-US">&gt;      previous
              discussion).</span><span lang="EN-US"><o:p></o:p></span></p>
          <p><span style="color:#1F497D" lang="EN-US"> </span><span
              lang="EN-US"><o:p></o:p></span></p>
          <p><span style="color:#1F497D" lang="EN-US">We will not be
              making this change (which seems consistent with your
              view). A location is a description of a physical location,
              while a site is part of a service (i.e., a CE). There is
              no reason to prohibit a service having two co-located CEs.
              And, of course, two different services could have sites at
              a single location.</span><span lang="EN-US"><o:p></o:p></span></p>
        </blockquote>
        <p class="MsoNormal"><span lang="EN-US"><br>
            [DB]<br>
            Ok - in that case, for clarity, can we make the opposite
            statement: "Multiple locations can be associated with a
            single site; similarly, a particular location can be
            associated with more than one site."<br>
            <br>
          </span><span style="color:#1F497D" lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">[Qin-1]:The
            statement we like to put is: Each site is associated with
            one location or more locations.</span><span lang="EN-US"><br>
          </span></p>
      </div>
    </blockquote>
    <br>
    <font color="#660000">[DB2] I think we already say that; but it is
      the converse I would like to add, i.e. each location can have one
      or more sites.<br>
    </font><br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AACC436@nkgeml513-mbx.china.huawei.com">
      <div class="WordSection1">
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">[Note: I came to the
            conclusion above based on the previous discussion about
            SubVPN, where you said site-network-accesses in different
            sites couldn't share physical components because different
            sites would be associated with different locations.  If
            multiple sites are allowed to be associated with the same
            location, then they could also share some physical
            components, right?]<br>
            <br>
          </span><span style="color:#1F497D" lang="EN-US">[Qin]: Sure,
            you can use " same-bearer</span><span lang="EN-US">
          </span><span style="color:#1F497D" lang="EN-US">" attribute to
            express that constraint the relationship between source
            site-network-access and target site-network-access.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
            <br>
          </span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">&gt;
            9. In section 6.12.2.2, the second paragraph needs to be
            updated (or</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     deleted?)
            now that you have added the "direction" leaf.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"> </span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">We don't believe
            there is anything actually incorrect about the current text.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
            [DB]<br>
            Ok, in that case I don't understand it. :)  Suppose there is
            a provider-managed connection with a qos-profile, and the
            direction in the qos profile is set to Site-to-WAN.  The
            second paragraph says: "the provider should ensure
            scheduling according to the requested policy in both traffic
            directions", but the description of the direction says:
            "used to specify the direction which qos profile is applied
            to".  Since the direction is Site-to-WAN in this example,
            this means the profile would only be applied in that
            direction, not in both directions.  That seems to contradict
            the previous text that says it should be applied in both
            directions?<br>
            <br>
          </span><span style="color:#1F497D" lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">[Qin-1]: I see your point. I think in case of
            provider-managed or co-managed connection, QoS profile are
            applied to both direction based on the second paragraph of
            section 6.12.2.2, that means the parameter “direction” is
            set to “both”.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">In case of customer-managed connection, QoS
            profile is applied to the direction from SP network to the
            customer site, that means the parameter “direction” should
            be set to “WAN-to-Site”.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">That’ why we think there is actually incorrect
            about the current text. Note that “direction” is just
            optional parameter in this model.<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">On the other hand, if we want to enhance the
            current text, we might consider:<o:p></o:p></span></p>
        <p class="MsoListParagraph"
          style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l0
          level1 lfo1">
          <!--[if !supportLists]--><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"><span style="mso-list:Ignore">1.<span
                style="font:7.0pt &quot;Times New Roman&quot;">      
              </span></span></span><!--[endif]--><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">allow direction at network access level to
            override the parameter in the site level.<o:p></o:p></span></p>
        <p class="MsoListParagraph"
          style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l0
          level1 lfo1">
          <!--[if !supportLists]--><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"><span style="mso-list:Ignore">2.<span
                style="font:7.0pt &quot;Times New Roman&quot;">      
              </span></span></span><!--[endif]--><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">Use “direction” condition to replace
            “provider-managed, co-managed, customer-managed” condition
            in the text and allow more flexibility to apply QoS profile
            to appropriate traffic direction.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">But I like to talk to the design team for this
            first.<br>
          </span></p>
      </div>
    </blockquote>
    <br>
    <font color="#660000">[DB2] Ok - option 2 would be my preference but
      lets see what others think.<br>
    </font><br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AACC436@nkgeml513-mbx.china.huawei.com">
      <div class="WordSection1">
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">
            <br>
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">&gt;
            12. The value carried in the svc-mtu leaf is now described
            more clearly, but its intended</span><span lang="EN-US">
            <o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     use is
            still unclear, at least to me.  Would something like the
            following be correct?  If</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     not, what
            is the correct expression of how to interpret this leaf?</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    "For a given
            VPN service, the service provider may discard (or for IPv4,
            may fragment)</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     packets
            that are longer than the smallest svc-mtu across all
            site-network-accesses for</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     all sites
            in the VPN."</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"> </span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">We think that SPs
            are used to the concept of link MTU. svc-mtu modifies the
            link MTU for the site-access links within the scope of a
            particular service. We think that an SP will know exactly
            how to handle packets that exceed MTU values</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
            [DB]<br>
            Ok, so the intent is that this is just local to the
            site-network-access.  I.e. we could say: "Packets
            transmitted over the site-network-access that are longer
            than the svc-mtu may be discarded (or for IPv4,
            fragmented)."<br>
            <br>
          </span><span style="color:#1F497D" lang="EN-US">[Qin-1]: I
            would prefer to leave this up to SP to determine how to deal
            with MTU exceeding, we can not limited only to discard or
            fragmented, does this make sense?</span></p>
      </div>
    </blockquote>
    <br>
    <font color="#660000">[DB2] Yes - that is why I said "may be
      discarded" instead of "must be discarded".  With my suggested
      text, it is still up to SP to determine how to handle it, but we
      are providing some warning for the customer.</font><br>
    <br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AACC436@nkgeml513-mbx.china.huawei.com">
      <div class="WordSection1">
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt; 13. In the new
            filters container, there is a list of filters indexed by
            type (ipv4, ipv6,</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     lan-tag, or
            vpn-policy-filter-type).  Each filter contains a leaf-list
            of IPv4 prefixes,</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     a leaf-list
            of ipv6 prefixes and a leaf-list of lan-tags.  Is the intent
            that the contents</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     of the
            filter matches the type?  There is nothing to enforce that
            currently - should</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     there be a
            "when" statement for each leaf-list, to restrict it to only
            the case</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     where the
            type is appropriate (e.g. the ipv4-lan-prefix leaf-list
            would have
          </span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     "when
            ../type = ipv4")?</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     I don't
            really understand what this new filter list achieves over
            having a single</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     filter that
            could contain a mix of ipv4 prefixes, ipv6 prefixes and
            lan-tags.  What's</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     the
            advantage of 3 filters each containing a single type over
            one filter containing</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     all three
            types?</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"> </span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">RFC 8049 allowed
            multiple filters of any one type, but not a mix of filters
            of different types. That's now fixed.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
            [DB]<br>
            Right, I was comparing to the previous version of 8049bis
            rather than to RFC8049 (which I agree did not allow a mix of
            prefixes and LAN tags).<br>
            <br>
          </span><span style="color:#1F497D" lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">[Qin-1]With the old version of RFC8049, you
            still can have a mix of prefixes and LAN tags, with two
            entries instead of single entry<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">“<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      &lt;entries&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;id&gt;ENTRY1&lt;/id&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;filter&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">        &lt;lan-tag&gt;LAN1&lt;/lan-tag&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;/filter&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;vpn&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">        &lt;vpn-id&gt;VPN2&lt;/vpn-id&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       
            &lt;site-role&gt;hub-role&lt;/site-role&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;/vpn&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      &lt;/entries&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      &lt;entries&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;id&gt;ENTRY2&lt;/id&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;filter&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       
            &lt;ipv4-lan-prefix&gt;LAN2&lt;/ipv4-lan-prefix&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;/filter&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;vpn&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">        &lt;vpn-id&gt;VPN2&lt;/vpn-id&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       
            &lt;site-role&gt;any-to-any-role&lt;/site-role&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;/vpn&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      &lt;/entries&gt;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">”<o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
            With the new version, you could have data like this:<br>
            <br>
            <tt>&lt;filters&gt;</tt><br>
            <tt>  &lt;filter&gt;</tt><br>
            <tt>    &lt;type&gt;lan&lt;/type&gt;</tt><br>
            <tt>   
              &lt;ipv4-lan-prefix&gt;10.0.0.0/24&lt;/ipv4-lan-prefix&gt; 
              // IPv4 prefix specified even though type is lan</tt><br>
            <tt>  &lt;/filter&gt;</tt><br>
            <tt>  &lt;filter&gt;</tt><br>
            <tt>    &lt;type&gt;ipv4&lt;/type&gt;</tt><br>
            <tt>   
              &lt;ipv6-lan-prefix&gt;10::0/64&lt;/ipv6-lan-prefix&gt; 
              // IPv6 prefix and lan tag specified even though type is
              ipv4</tt><br>
            <tt>    &lt;lan-tag&gt;foo&lt;/lan-tag&gt;</tt><br>
            <tt>  &lt;/filter&gt;</tt><br>
            <tt>&lt;/filters&gt;</tt></span><tt><span
              style="color:#1F497D" lang="EN-US"><o:p></o:p></span></tt></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">[Qin-1]: This can be easily fixed by add when
            statement, e.g.,<o:p></o:p></span></p>
        <p class="MsoNormal" style="text-indent:15.75pt"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">when "derived-from-or-self(../type,
            'l3vpn-svc:ipv4')" {<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">         description<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">         "Only applies when vpn policy filter
            is ipv4-lan-prefix.";<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">        }<o:p></o:p></span></p>
      </div>
    </blockquote>
    <br>
    <font color="#660000">[DB2] Yes, adding 'when' statements would also
      work.</font><br>
    <br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AACC436@nkgeml513-mbx.china.huawei.com">
      <div class="WordSection1">
        <p class="MsoNormal"><span lang="EN-US">
            <br>
            I think the aim could be achieved with a single filter that
            contains leaf-lists for IPv4, Ipv6 and lan tags, i.e.:<br>
            <br>
            <tt>container filter {</tt><br>
            <tt>  leaf-list ipv4-lan-prefix { type inet:ipv4-prefix; }</tt><br>
            <tt>  leaf-list ipv6-lan-prefix { type inet:ipv6-prefix; }</tt><br>
            <tt>  leaf-list lan-tag { type string; }</tt><br>
            <tt>}</tt><br>
            <br>
            This allows full flexibility, i.e. a filter can have zero or
            more IPv4 prefixes, zero or more IPv6 prefixes and zero or
            more LAN tags.<br>
            <br>
          </span><span style="color:#1F497D" lang="EN-US">[Qin]: Similar
            to our design team's proposal in the new version, but ipv4
            and ipv6 and lan-tag are not of the same type. put them in
            the same container seems weird,</span><span
            style="font-family:Wingdings;color:#1F497D" lang="EN-US">J</span><span
            style="color:#1F497D" lang="EN-US">.<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Our
            proposal follow similar construct proposed for "
            routing-protocol</span><span lang="EN-US">
          </span><span style="color:#1F497D" lang="EN-US">" list in this
            model.</span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt; 15. For the
            site-network-access connection addressing,
            ip-connection/ipv4/address-</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;   
            allocation-type is optional with no default, but
            ip-connection/ipv6/address-allocation-</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    type has a
            default defined (static-addressing).  This means it's
            impossible to have a</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;   
            site-network-access that only uses IPv4 addressing.  I think
            the default should be</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    deleted in
            the IPv6 case, so that an IPv4-only site-network-access
            could be</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    represented
            by simply not setting the IPv6 address-allocation-type.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"> </span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">Good catch, to get
            consistent with original RFC8049, I would propose to add the
            default for ipv4-only site-network-access as well.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">Note that we use
            "feature" for both ipv4 case and ipv6 case.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
            [DB]<br>
            Using "feature" doesn't solve the problem, since that turns
            IPv4 or IPv6 on or off for every service.  However, the SP
            might have some IPv4-only services and some IPv6-only
            services.  So, they need to advertise both features, but
            they also need a way to not specify an IPv6 connection
            address for the IPv4-only services, and to not specify an
            IPv4 connection address for the IPv6-only services.<br>
            So, I believe the best solution is to delete the default for
            the address-allocation-type in both cases.<br>
            <br>
          </span><span style="color:#1F497D" lang="EN-US">[Qin-1]: I am
            fine to delete both default values, but<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">RFC7950
            section 7.6.1 said:<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">"<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">  
            Note that if the leaf or any of its ancestors has a "when"
            condition<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">  
            or "if-feature" expression that evaluates to "false", then
            the<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">  
            default value is not in use.<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">"<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">To
            my understanding, if the server doesn’t support one feature
            or advertise one feature, the default value will not in use.<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">If
            the server advertise both features, it doesn’t say default
            value for each feature MUST be specified.<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">So
            if both features can be supported, is there any reason we
            only specify only IPv6 connection or IPv4 connection?</span></p>
      </div>
    </blockquote>
    <font color="#660000"><br>
      [DB2] The difference is that features apply across the whole
      server - if the ipv4 feature is disabled, then the server cannot
      support IPv4 at all, and there can be <b>no</b> services with
      IPv4.  However, the case I was describing is different - in this
      case, there are some services that support IPv4 and some that do
      not.  For example, the SP might offer an IPv4 product, and IPv6
      product and a dual-stack product, where the dual-stack product is
      more expensive.  So some customers might choose IPv4-only or
      IPv6-only - or a particular customer might choose a mix of
      ipv4-only and ipv6-only services.  This is why I think the default
      should be deleted in both cases.</font><br>
    <br>
    <br>
        David<br>
    <br>
    <br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AACC436@nkgeml513-mbx.china.huawei.com">
      <div class="WordSection1">
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
                David<br>
            <br>
            <br>
            <br>
            <o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"> </span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">Thanks for your time
            and effort.</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"> </span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">Qin</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <div>
          <p class="MsoNormal"><span lang="EN-US">On 09/08/2017 11:40,
              Qin Wu wrote:<o:p></o:p></span></p>
        </div>
        <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
          <pre><span lang="EN-US">Here is the update to draft-wu-l3sm-rfc8049bis-02 based on additional discussion on the list.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"><a href="https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt" moz-do-not-send="true">https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US">Thank David for additional comments. Thank Design team to help address these comments.<o:p></o:p></span></pre>
          <pre><span lang="EN-US">The main changes include:<o:p></o:p></span></pre>
          <pre><span lang="EN-US">1.Clarify the rational of the model in the section 5 based on David's comment.  <o:p></o:p></span></pre>
          <pre><span lang="EN-US">2.Add multi-filter and multi-VPN per entry support for VPN policy.  <o:p></o:p></span></pre>
          <pre><span lang="EN-US">3.Modify description for svc-input-bandwidth leaf and svc-output- <o:p></o:p></span></pre>
          <pre><span lang="EN-US">Bandwidth leaf to address inconsistency issue with the text in section 6.12.1. <o:p></o:p></span></pre>
          <pre><span lang="EN-US">4. Add text to clarify the way to achieve Per-VPN QoS policy.<o:p></o:p></span></pre>
          <pre><span lang="EN-US">5. Remove address-scope-type since there is no common understanding on this.<o:p></o:p></span></pre>
          <pre><span lang="EN-US">6. Modify the description of autonomous-system under container </span>“<span lang="EN-US">BGP</span>”<span lang="EN-US"> to address David's comment on AS.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">Regarding provider address and mask to the model for the DHCP and DHCP relay cases, talking with design team members,<o:p></o:p></span></pre>
          <pre><span lang="EN-US">We believe these parameters are the one requested by Customer to Provider and therefore we keep it in the model.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">Regarding Number of BGP sessions, eBGP multihop between loopbacks and other similar issue, The design team agreed that it is not<o:p></o:p></span></pre>
          <pre><span lang="EN-US">reasonable to enumerate all the cases this models doesn't support. The current text has been clear about this.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">We believe that we have address all the comments. Thanks!<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">-Qin<o:p></o:p></span></pre>
          <pre><span lang="EN-US">-----</span>邮件原件<span lang="EN-US">-----<o:p></o:p></span></pre>
          <pre>发件人<span lang="EN-US">: <a href="mailto:internet-drafts@ietf.org" moz-do-not-send="true">internet-drafts@ietf.org</a> [<a href="mailto:internet-drafts@ietf.org" moz-do-not-send="true">mailto:internet-drafts@ietf.org</a>] <o:p></o:p></span></pre>
          <pre>发送时间<span lang="EN-US">: 2017</span>年<span lang="EN-US">8</span>月<span lang="EN-US">9</span>日<span lang="EN-US"> 18:20<o:p></o:p></span></pre>
          <pre>收件人<span lang="EN-US">: Qin Wu; Luis Tomotaki; Kenichi Ogaki; Stephane Litkowski<o:p></o:p></span></pre>
          <pre>主题<span lang="EN-US">: New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">A new version of I-D, draft-wu-l3sm-rfc8049bis-02.txt has been successfully submitted by Qin Wu and posted to the IETF repository.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">Name:            draft-wu-l3sm-rfc8049bis<o:p></o:p></span></pre>
          <pre><span lang="EN-US">Revision: 02<o:p></o:p></span></pre>
          <pre><span lang="EN-US">Title:           YANG Data Model for L3VPN Service Delivery<o:p></o:p></span></pre>
          <pre><span lang="EN-US">Document date:   2017-08-09<o:p></o:p></span></pre>
          <pre><span lang="EN-US">Group:           Individual Submission<o:p></o:p></span></pre>
          <pre><span lang="EN-US">Pages:           181<o:p></o:p></span></pre>
          <pre><span lang="EN-US">URL:            <a href="https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt" moz-do-not-send="true">https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US">Status:         <a href="https://datatracker.ietf.org/doc/draft-wu-l3sm-rfc8049bis/" moz-do-not-send="true">https://datatracker.ietf.org/doc/draft-wu-l3sm-rfc8049bis/</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US">Htmlized:       <a href="https://tools.ietf.org/html/draft-wu-l3sm-rfc8049bis-02" moz-do-not-send="true">https://tools.ietf.org/html/draft-wu-l3sm-rfc8049bis-02</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US">Htmlized:       <a href="https://datatracker.ietf.org/doc/html/draft-wu-l3sm-rfc8049bis-02" moz-do-not-send="true">https://datatracker.ietf.org/doc/html/draft-wu-l3sm-rfc8049bis-02</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US">Diff:           <a href="https://www.ietf.org/rfcdiff?url2=draft-wu-l3sm-rfc8049bis-02" moz-do-not-send="true">https://www.ietf.org/rfcdiff?url2=draft-wu-l3sm-rfc8049bis-02</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">Abstract:<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   This document defines a YANG data model that can be used for<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   communication between customers and network operators and to deliver<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   a Layer 3 provider-provisioned VPN service.  This document is limited<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   to BGP PE-based VPNs as described in RFCs 4026, 4110, and 4364.  This<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   model is intended to be instantiated at the management system to<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   deliver the overall service.  It is not a configuration model to be<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   used directly on network elements.  This model provides an abstracted<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   view of the Layer 3 IP VPN service configuration components.  It will<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   be up to the management system to take this model as input and use<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   specific configuration models to configure the different network<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   elements to deliver the service.  How the configuration of network<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   elements is done is out of scope for this document.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">   If approved, this document obsoletes RFC 8049.  The changes are a<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   series of small fixes to the YANG module, and some clarifications to<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   the text.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">                                                                                  <o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">The IETF Secretariat<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">_______________________________________________<o:p></o:p></span></pre>
          <pre><span lang="EN-US">L3sm mailing list<o:p></o:p></span></pre>
          <pre><span lang="EN-US"><a href="mailto:L3sm@ietf.org" moz-do-not-send="true">L3sm@ietf.org</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US"><a href="https://www.ietf.org/mailman/listinfo/l3sm" moz-do-not-send="true">https://www.ietf.org/mailman/listinfo/l3sm</a><o:p></o:p></span></pre>
        </blockquote>
        <p class="MsoNormal"><span lang="EN-US"><br>
            <br>
            <br>
            <o:p></o:p></span></p>
        <pre><span lang="EN-US">-- <o:p></o:p></span></pre>
        <pre><span lang="EN-US">David Ball<o:p></o:p></span></pre>
        <pre><span lang="EN-US"><a href="mailto:daviball@cisco.com" moz-do-not-send="true">&lt;daviball@cisco.com&gt;</a><o:p></o:p></span></pre>
        <p class="MsoNormal"><span lang="EN-US"><br>
            <br>
            <o:p></o:p></span></p>
        <pre><span lang="EN-US">-- <o:p></o:p></span></pre>
        <pre><span lang="EN-US">David Ball<o:p></o:p></span></pre>
        <pre><span lang="EN-US"><a href="mailto:daviball@cisco.com" moz-do-not-send="true">&lt;daviball@cisco.com&gt;</a><o:p></o:p></span></pre>
      </div>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com">&lt;daviball@cisco.com&gt;</a></pre>
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To: Qin Wu <bill.wu@huawei.com>, "l3sm@ietf.org" <l3sm@ietf.org>
Cc: Stephane Litkowski <stephane.litkowski@orange.com>, Kenichi Ogaki <ke-oogaki@kddi.com>, "adrian@olddog.co.uk" <adrian@olddog.co.uk>
References: <B8F9A780D330094D99AF023C5877DABA9AA5D7A2@nkgeml513-mbx.china.huawei.com> <c76328ad-b71e-b2a3-92a4-b02beac2be7d@cisco.com> <B8F9A780D330094D99AF023C5877DABA9AABA8A4@nkgeml513-mbx.china.huawei.com> <1823e4d3-c6ff-f3ca-d140-74fc5edba188@cisco.com> <B8F9A780D330094D99AF023C5877DABA9AACC2FE@nkgeml513-mbx.china.huawei.com> <57523131-0016-069a-8663-63c3be1fac81@cisco.com> <B8F9A780D330094D99AF023C5877DABA9AACC7B0@nkgeml513-mbx.china.huawei.com>
From: David Ball <daviball@cisco.com>
Message-ID: <aca381d3-9dfa-bdf0-fac0-1be4e0ad6ce6@cisco.com>
Date: Thu, 24 Aug 2017 11:30:40 +0100
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Archived-At: <https://mailarchive.ietf.org/arch/msg/l3sm/3CIa1O0VYWMcaAdbVSZs3E6AeZY>
Subject: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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On 24/08/2017 11:11, Qin Wu wrote:
>
> *发件人:*David Ball [mailto:daviball@cisco.com]
> *发送时间:*2017年8月24日17:32
> *收件人:*Qin Wu; l3sm@ietf.org
> *抄送:*Stephane Litkowski; Kenichi Ogaki; adrian@olddog.co.uk
> *主题:*Re: [L3sm] New Version Notification for 
> draft-wu-l3sm-rfc8049bis-02.txt
>
> On 24/08/2017 01:50, Qin Wu wrote:
>
> [Qin]: Okay, the propose change will look like this:
>
> “
>
> import ietf-netconf-acm {
>
>   prefix nacm;
>
> }
>
> ……
>
> grouping vpn-profile-cfg {
>
>   container valid-provider-identifiers {
>
>    list cloud-identifier {
>
>     if-feature cloud-access;
>
>     key id;
>
>     leaf id {
>
>      type string;
>
>      description
>
>       "Identification of cloud service.
>
>        Local administration meaning.";
>
>     }
>
> nacm:default-deny-write;
>
>     description
>
>     "List for Cloud Identifiers.";
>
>   }
>
>    list encryption-profile-identifier {
>
>     key id;
>
>     leaf id {
>
>      type string;
>
>      description
>
>       "Identification of the SP encryption profile
>
>        to be used. Local administration meaning.";
>
>     }
>
>  nacm:default-deny-write;
>
>     description
>
>     "List for encryption profile identifiers.";
>
>    }
>
>    list qos-profile-identifier {
>
>     key id;
>
>     leaf id {
>
>      type string;
>
>      description
>
>       "Identification of the QoS Profile to be used.
>
>        Local administration meaning.";
>
>    }
>
> nacm:default-deny-write;
>
>     description
>
>     "List for QoS Profile Identifiers.";
>
>    }
>
>    list bfd-profile-identifier {
>
>     key id;
>
>     leaf id {
>
>      type string;
>
>      description
>
>       "Identification of the SP BFD Profile to be used.
>
>        Local administration meaning.";
>
>     }
>
> nacm:default-deny-write;
>
>     description
>
>     "List for BFD profile Identifiers.";
>
>    }
>
>      description
>
>     "Container for Valid Provider Identifies.";
>
>   }
>
>    description
>
>    "Grouping for VPN Profile configuration.";
>
> }
>
> ”
>
> This will get in line with Jan’s proposal as well.
>
>
> If my understanding of RFC 6536 is correct, you need to put it on the 
> leaves as well as the lists (it doesn't cascade down the tree like 
> most other yang constructs).
>
> [Qin]: ahha, I find a example on how to use 
> “nacm:default-deny-write;”, see example in RFC7317,
>
> So we only need to put it on container level, the change will be like 
> this:
>

[DB] Like I said, my reading of RFC6536 is that it doesn't cascade down 
the tree, so it needs to be put on every node.  Just putting it on the 
container would mean that the client couldn't create the container, but 
if the container already existed, they would still be able to write to 
everything inside it.  See RFC6536 section 3.2.3 for example.  I think 
the example in RFC7317 is wrong, although it is the same authors as 
RFC6536, which is curious.  I'll check with Martin.

     David

> “
>
> import ietf-netconf-acm {
>
>   prefix nacm;
>
> }
>
> ……
>
> grouping vpn-profile-cfg {
>
>   container valid-provider-identifiers {
>
>    list cloud-identifier {
>
>     if-feature cloud-access;
>
>     key id;
>
>     leaf id {
>
>      type string;
>
>      description
>
>       "Identification of cloud service.
>
>        Local administration meaning.";
>
>     }
>
>     description
>
>     "List for Cloud Identifiers.";
>
>    }
>
>    list encryption-profile-identifier {
>
>     key id;
>
>     leaf id {
>
>      type string;
>
>      description
>
>       "Identification of the SP encryption profile
>
>        to be used. Local administration meaning.";
>
>     }
>
>     description
>
>     "List for encryption profile identifiers.";
>
>    }
>
>    list qos-profile-identifier {
>
>     key id;
>
>     leaf id {
>
>      type string;
>
>      description
>
>       "Identification of the QoS Profile to be used.
>
>        Local administration meaning.";
>
>     }
>
>          nacm:default-deny-write;
>
>     description
>
>     "List for QoS Profile Identifiers.";
>
>    }
>
>    list bfd-profile-identifier {
>
>     key id;
>
>     leaf id {
>
>      type string;
>
>      description
>
>       "Identification of the SP BFD Profile to be used.
>
>        Local administration meaning.";
>
>     }
>
>     description
>
>     "List for BFD profile Identifiers.";
>
>    }
>
>      description
>
>     "Container for Valid Provider Identifies.";
>
>   }
>
>   nacm:default-deny-write;
>
>    description
>
>    "Grouping for VPN Profile configuration.";
>
> }
>
> ”
>
> Does this work for you?
>
>     David
>
>
> -- 
> David Ball
> <daviball@cisco.com> <mailto:daviball@cisco.com>

-- 
David Ball
<daviball@cisco.com>


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    <br>
    <div class="moz-cite-prefix">On 24/08/2017 11:11, Qin Wu wrote:<br>
    </div>
    <blockquote type="cite"
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style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"><o:p> </o:p></span></p>
        <div>
          <div style="border:none;border-top:solid #B5C4DF
            1.0pt;padding:3.0pt 0cm 0cm 0cm">
            <p class="MsoNormal"><b><span
                  style="font-size:10.0pt;color:windowtext">发件人<span
                    lang="EN-US">:</span></span></b><span
                style="font-size:10.0pt;color:windowtext" lang="EN-US">
                David Ball [<a class="moz-txt-link-freetext" href="mailto:daviball@cisco.com">mailto:daviball@cisco.com</a>]
                <br>
              </span><b><span style="font-size:10.0pt;color:windowtext">发送时间<span
                    lang="EN-US">:</span></span></b><span
                style="font-size:10.0pt;color:windowtext" lang="EN-US">
                2017</span><span
                style="font-size:10.0pt;color:windowtext">年<span
                  lang="EN-US">8</span>月<span lang="EN-US">24</span>日<span
                  lang="EN-US"> 17:32<br>
                </span><b>收件人<span lang="EN-US">:</span></b><span
                  lang="EN-US"> Qin Wu; <a class="moz-txt-link-abbreviated" href="mailto:l3sm@ietf.org">l3sm@ietf.org</a><br>
                </span><b>抄送<span lang="EN-US">:</span></b><span
                  lang="EN-US"> Stephane Litkowski; Kenichi Ogaki;
                  <a class="moz-txt-link-abbreviated" href="mailto:adrian@olddog.co.uk">adrian@olddog.co.uk</a><br>
                </span><b>主题<span lang="EN-US">:</span></b><span
                  lang="EN-US"> Re: [L3sm] New Version Notification for
                  draft-wu-l3sm-rfc8049bis-02.txt<o:p></o:p></span></span></p>
          </div>
        </div>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">On 24/08/2017 01:50, Qin
            Wu wrote:<br>
            <br>
            <o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
            style="color:#1F497D" lang="EN-US">[Qin]: Okay, the propose
            change will look like this:</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">“</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
            lang="EN-US">import ietf-netconf-acm {</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
            lang="EN-US">  prefix nacm;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
            lang="EN-US">}
          </span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
            lang="EN-US">……</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">grouping vpn-profile-cfg {</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">  container valid-provider-identifiers {</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   list cloud-identifier {</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    if-feature cloud-access;</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    key id;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    leaf id {</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     type string;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     description</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      "Identification of cloud service.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       Local administration meaning.";</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    }</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   
          </span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
            lang="EN-US">nacm:default-deny-write;</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    description</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    "List for Cloud Identifiers.";</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">  }</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   list encryption-profile-identifier {</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    key id;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    leaf id {</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     type string;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     description</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      "Identification of the SP encryption
            profile</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       to be used. Local administration
            meaning.";</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    }</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">  
          </span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
            lang="EN-US"> nacm:default-deny-write;</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    description</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    "List for encryption profile identifiers.";</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   }</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   list qos-profile-identifier {</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    key id;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    leaf id {</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     type string;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     description</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      "Identification of the QoS Profile to be
            used.</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       Local administration meaning.";</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   }</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">        
          </span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
            lang="EN-US">nacm:default-deny-write;</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    description</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    "List for QoS Profile Identifiers.";</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   }</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"> </span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   list bfd-profile-identifier {</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    key id;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    leaf id {</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     type string;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     description</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      "Identification of the SP BFD Profile to
            be used.</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       Local administration meaning.";</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    }</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">        
          </span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
            lang="EN-US">nacm:default-deny-write;</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    description</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    "List for BFD profile Identifiers.";</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   }</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     description</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    "Container for Valid Provider Identifies.";</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">  }</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   description</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   "Grouping for VPN Profile configuration.";</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">}</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">”</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">This will get in line with Jan’s proposal as
            well.</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
            If my understanding of RFC 6536 is correct, you need to put
            it on the leaves as well as the lists (it doesn't cascade
            down the tree like most other yang constructs).<br>
            <br>
          </span><span style="color:#1F497D" lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">[Qin]: ahha, I find a example on how to use “</span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
            lang="EN-US">nacm:default-deny-write;</span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">”, see example in RFC7317,<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">So we only need to put it on container level,
            the change will be like this:</span></p>
      </div>
    </blockquote>
    <br>
    [DB] Like I said, my reading of RFC6536 is that it doesn't cascade
    down the tree, so it needs to be put on every node.  Just putting it
    on the container would mean that the client couldn't create the
    container, but if the container already existed, they would still be
    able to write to everything inside it.  See RFC6536 section 3.2.3
    for example.  I think the example in RFC7317 is wrong, although it
    is the same authors as RFC6536, which is curious.  I'll check with
    Martin.<br>
    <br>
        David<br>
    <br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AACC7B0@nkgeml513-mbx.china.huawei.com">
      <div class="WordSection1">
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">“<o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
            lang="EN-US">import ietf-netconf-acm {</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
            lang="EN-US">  prefix nacm;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
            lang="EN-US">}
          </span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"
          style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
            lang="EN-US">……</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">grouping vpn-profile-cfg {<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">  container valid-provider-identifiers {<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   list cloud-identifier {<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    if-feature cloud-access;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    key id;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    leaf id {<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     type string;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     description<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      "Identification of cloud service.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       Local administration meaning.";<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    }<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    description<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    "List for Cloud Identifiers.";<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   }<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   list encryption-profile-identifier {<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    key id;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    leaf id {<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     type string;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     description<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      "Identification of the SP encryption
            profile<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       to be used. Local administration
            meaning.";<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    }<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    description<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    "List for encryption profile identifiers.";<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   }<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   list qos-profile-identifier {<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    key id;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    leaf id {<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     type string;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     description<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      "Identification of the QoS Profile to be
            used.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       Local administration meaning.";<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    }<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">         nacm:default-deny-write;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    description<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    "List for QoS Profile Identifiers.";<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   }<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   list bfd-profile-identifier {<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    key id;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    leaf id {<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     type string;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     description<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      "Identification of the SP BFD Profile to
            be used.<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       Local administration meaning.";<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    }<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    description<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    "List for BFD profile Identifiers.";<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   }<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">     description<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">    "Container for Valid Provider Identifies.";<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">  }<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
            lang="EN-US">  nacm:default-deny-write;<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   description<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">   "Grouping for VPN Profile configuration.";<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">}<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">”<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Does
            this work for you?</span><span lang="EN-US"><br>
            <br>
                David<br>
            <br>
            <br>
            <o:p></o:p></span></p>
        <pre><span lang="EN-US">-- <o:p></o:p></span></pre>
        <pre><span lang="EN-US">David Ball<o:p></o:p></span></pre>
        <pre><span lang="EN-US"><a href="mailto:daviball@cisco.com" moz-do-not-send="true">&lt;daviball@cisco.com&gt;</a><o:p></o:p></span></pre>
      </div>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com">&lt;daviball@cisco.com&gt;</a></pre>
  </body>
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--_000_B8F9A780D330094D99AF023C5877DABA9AACC813nkgeml513mbxchi_--


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From: Qin Wu <bill.wu@huawei.com>
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To: Qin Wu <bill.wu@huawei.com>, "l3sm@ietf.org" <l3sm@ietf.org>
Cc: Stephane Litkowski <stephane.litkowski@orange.com>, Kenichi Ogaki <ke-oogaki@kddi.com>, "adrian@olddog.co.uk" <adrian@olddog.co.uk>
References: <B8F9A780D330094D99AF023C5877DABA9AA5D7A2@nkgeml513-mbx.china.huawei.com> <c76328ad-b71e-b2a3-92a4-b02beac2be7d@cisco.com> <B8F9A780D330094D99AF023C5877DABA9AABA8A4@nkgeml513-mbx.china.huawei.com> <1823e4d3-c6ff-f3ca-d140-74fc5edba188@cisco.com> <B8F9A780D330094D99AF023C5877DABA9AACC2FE@nkgeml513-mbx.china.huawei.com> <57523131-0016-069a-8663-63c3be1fac81@cisco.com> <B8F9A780D330094D99AF023C5877DABA9AACC7B0@nkgeml513-mbx.china.huawei.com> <aca381d3-9dfa-bdf0-fac0-1be4e0ad6ce6@cisco.com> <B8F9A780D330094D99AF023C5877DABA9AACC813@nkgeml513-mbx.china.huawei.com>
From: David Ball <daviball@cisco.com>
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Date: Thu, 24 Aug 2017 13:28:56 +0100
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Subject: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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On 24/08/2017 11:50, Qin Wu wrote:
>
> [DB] Like I said, my reading of RFC6536 is that it doesn't cascade 
> down the tree, so it needs to be put on every node.  Just putting it 
> on the container would mean that the client couldn't create the 
> container, but if the container already existed, they would still be 
> able to write to everything inside it.  See RFC6536 section 3.2.3 for 
> example.  I think the example in RFC7317 is wrong, although it is the 
> same authors as RFC6536, which is curious.  I'll check with Martin.
>
> [Qin]:  Yes, we need to get confirm about this, it looks to me if we 
> apply “nacm:default-deny-write” to top level node, 
> “nacm:default-deny-write” applicability will spread to the lower level 
> nodes as well.
>
> By reading RFC6536 section 3.2.3 example, I didn’t get the same 
> understanding. Please correct me if I am wrong.
>

I got a reply from Martin, he says you are right (although he agreed 
RFC6536 is unclear).  So, it's only needed on the container.

Thanks,

     David

-- 
David Ball
<daviball@cisco.com>


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    On 24/08/2017 11:50, Qin Wu wrote:<br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AACC813@nkgeml513-mbx.china.huawei.com">
      <p class="MsoNormal"><span lang="EN-US">[DB] Like I said, my
          reading of RFC6536 is that it doesn't cascade down the tree,
          so it needs to be put on every node.  Just putting it on the
          container would mean that the client couldn't create the
          container, but if the container already existed, they would
          still be able to write to everything inside it.  See RFC6536
          section 3.2.3 for example.  I think the example in RFC7317 is
          wrong, although it is the same authors as RFC6536, which is
          curious.  I'll check with Martin.</span><span
          style="color:#1F497D" lang="EN-US"><o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US"><o:p> </o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">[Qin]:  Yes, we need to get confirm about this,
          it looks to me if we apply “</span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
          lang="EN-US">nacm:default-deny-write</span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">” to top level node, “</span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:red"
          lang="EN-US">nacm:default-deny-write</span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">” applicability will spread to the lower level
          nodes as well.<o:p></o:p></span></p>
      <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
          lang="EN-US">By reading RFC6536 section 3.2.3 example, I
          didn’t get the same understanding. Please correct me if I am
          wrong.</span></p>
    </blockquote>
    <br>
    I got a reply from Martin, he says you are right (although he agreed
    RFC6536 is unclear).  So, it's only needed on the container.<br>
    <br>
    Thanks,<br>
    <br>
        David<br>
    <br>
    <pre class="moz-signature" cols="72">-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com">&lt;daviball@cisco.com&gt;</a></pre>
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From: Qin Wu <bill.wu@huawei.com>
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<body bgcolor=3D"#FFFFFF">
<div>Thanks&nbsp;David,&nbsp;I&nbsp;am&nbsp;on&nbsp;netconf&nbsp;list.:-)<b=
r>
<br>
Sent&nbsp;from&nbsp;HUAWEI&nbsp;AnyOffice</div>
<div name=3D"AnyOffice-Background-Image" style=3D"border-top:1px solid #B5C=
4DF; font-size:14px; line-height:20px; padding:8px">
<div><b>=B7=A2=BC=FE=C8=CB=A3=BA </b>daviball</div>
<div><b>=CA=D5=BC=FE=C8=CB=A3=BA </b>Qin Wu; l3sm; </div>
<div><b>=B3=AD=CB=CD=A3=BA </b>stephane.litkowski; ke-oogaki; adrian; </div=
>
<div><b>=D6=F7=CC=E2=A3=BA </b>Re: [L3sm] New Version Notification for draf=
t-wu-l3sm-rfc8049bis-02.txt</div>
<div><b>=CA=B1=BC=E4=A3=BA </b>2017-08-24 20:29:08</div>
<div><br>
<br>
</div>
</div>
<div>On 24/08/2017 11:50, Qin Wu wrote:<br>
<blockquote type=3D"cite">
<p class=3D"MsoNormal"><span lang=3D"EN-US">[DB] Like I said, my reading of=
 RFC6536 is that it doesn't cascade down the tree, so it needs to be put on=
 every node.&nbsp; Just putting it on the container would mean that the cli=
ent couldn't create the container, but if
 the container already existed, they would still be able to write to everyt=
hing inside it.&nbsp; See RFC6536 section 3.2.3 for example.&nbsp; I think =
the example in RFC7317 is wrong, although it is the same authors as RFC6536=
, which is curious.&nbsp; I'll check with Martin.</span><span lang=3D"EN-US=
" style=3D"color:#1F497D"></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt; font=
-family:&quot;Calibri&quot;,&quot;sans-serif&quot;; color:#1F497D">&nbsp;</=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt; font=
-family:&quot;Calibri&quot;,&quot;sans-serif&quot;; color:#1F497D">[Qin]: &=
nbsp;Yes, we need to get confirm about this, it looks to me if we apply =A1=
=B0</span><span lang=3D"EN-US" style=3D"font-size:10.5pt; font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;; color:red">nacm:default-deny-write</=
span><span lang=3D"EN-US" style=3D"font-size:10.5pt; font-family:&quot;Cali=
bri&quot;,&quot;sans-serif&quot;; color:#1F497D">=A1=B1
 to top level node, =A1=B0</span><span lang=3D"EN-US" style=3D"font-size:10=
.5pt; font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;; color:red">na=
cm:default-deny-write</span><span lang=3D"EN-US" style=3D"font-size:10.5pt;=
 font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;; color:#1F497D">=A1=
=B1 applicability
 will spread to the lower level nodes as well.</span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt; font=
-family:&quot;Calibri&quot;,&quot;sans-serif&quot;; color:#1F497D">By readi=
ng RFC6536 section 3.2.3 example, I didn=A1=AFt get the same understanding.=
 Please correct me if I am wrong.</span></p>
</blockquote>
<br>
I got a reply from Martin, he says you are right (although he agreed RFC653=
6 is unclear).&nbsp; So, it's only needed on the container.<br>
<br>
Thanks,<br>
<br>
&nbsp;&nbsp;&nbsp; David<br>
<br>
<pre class=3D"moz-signature" cols=3D"72">--=20
David Ball
<a class=3D"moz-txt-link-rfc2396E" href=3D"mailto:daviball@cisco.com">&lt;d=
aviball@cisco.com&gt;</a></pre>
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From: David Ball <daviball@cisco.com>
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Subject: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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Thanks - a couple more comments inline with [DB3]:


On 25/08/2017 07:18, Qin Wu wrote:
>
> *发件人:*L3sm [mailto:l3sm-bounces@ietf.org] *代表 *David Ball
> *发送时间:*2017年8月24日17:52
> *收件人:*Qin Wu; l3sm@ietf.org
> *抄送:*Stephane Litkowski; Kenichi Ogaki; adrian@olddog.co.uk
> *主题:*Re: [L3sm] New Version Notification for 
> draft-wu-l3sm-rfc8049bis-02.txt
>
> Thanks - more inline with [DB2]:
>
> On 24/08/2017 04:26, Qin Wu wrote:
>
>     Thank David for follow up comments. See my reply inline below
>     marked with [Qin-1].
>
>     *发件人:*David Ball [mailto:daviball@cisco.com]
>     *发送时间:*2017年8月23日20:22
>     *收件人:*Qin Wu; l3sm@ietf.org <mailto:l3sm@ietf.org>
>     *抄送:*Stephane Litkowski; Kenichi Ogaki; adrian@olddog.co.uk
>     <mailto:adrian@olddog.co.uk>
>     *主题:*Re: [L3sm] New Version Notification for
>     draft-wu-l3sm-rfc8049bis-02.txt
>
>     Thanks Qin, I think most of the comments are being addressed. 
>     Some responses below, I've snipped out the ones where we have
>     agreement.
>
>     On 21/08/2017 07:47, Qin Wu wrote:
>
>         > 2. In section 6.3, I think we can add a statement like: "Multiple
>         locations can be associated
>
>         >     with a single site, but a particular location cannot be associated
>         with more than one site."
>
>         >   (Personally I don't see the need for this restriction, but
>         this sentence is based on the
>
>         >     previous discussion).
>
>         We will not be making this change (which seems consistent with
>         your view). A location is a description of a physical
>         location, while a site is part of a service (i.e., a CE).
>         There is no reason to prohibit a service having two co-located
>         CEs. And, of course, two different services could have sites
>         at a single location.
>
>
>     [DB]
>     Ok - in that case, for clarity, can we make the opposite
>     statement: "Multiple locations can be associated with a single
>     site; similarly, a particular location can be associated with more
>     than one site."
>
>
>     [Qin-1]:The statement we like to put is: Each site is associated
>     with one location or more locations.
>
>
> [DB2] I think we already say that; but it is the converse I would like 
> to add, i.e. each location can have one or more sites.
>
> [Qin-2]:I think the text MUST be consistent with the model. In the 
> model, the site and location are organized as:
>
> One site can have one or more location. Not the other way around, in 
> the text, we can see multi-location site is one typical example that 
> is discussed in the draft.
>
> “
>
> +--rw sites
>
> +--rw site* [site-id]
>
> +--rw site-id         svc-id
>
> +--rw requested-site-start?  yang:date-and-time
>
> +--rw requested-site-stop?   yang:date-and-time
>
> +--rw locations
>
> | +--rw location* [location-id]
>
> ”
>
> Considering consistency and clarity, I think we should use statement I 
> mentioned above previously.
>

[DB3]
Ok, but I think that's just a phrasing issue.  Would you be happier 
adding "Two or more sites can be associated with the same location, by 
referencing the same location ID"?

> [Note: I came to the conclusion above based on the previous discussion 
> about SubVPN, where you said site-network-accesses in different sites 
> couldn't share physical components because different sites would be 
> associated with different locations.  If multiple sites are allowed to 
> be associated with the same location, then they could also share some 
> physical components, right?]
>
> [Qin]: Sure, you can use " same-bearer" attribute to express that 
> constraint the relationship between source site-network-access and 
> target site-network-access.
>
>
>
>
> > 9. In section 6.12.2.2, the second paragraph needs to be updated (or
>
> >     deleted?) now that you have added the "direction" leaf.
>
> We don't believe there is anything actually incorrect about the 
> current text.
>
>
> [DB]
> Ok, in that case I don't understand it. :)  Suppose there is a 
> provider-managed connection with a qos-profile, and the direction in 
> the qos profile is set to Site-to-WAN.  The second paragraph says: 
> "the provider should ensure scheduling according to the requested 
> policy in both traffic directions", but the description of the 
> direction says: "used to specify the direction which qos profile is 
> applied to".  Since the direction is Site-to-WAN in this example, this 
> means the profile would only be applied in that direction, not in both 
> directions.  That seems to contradict the previous text that says it 
> should be applied in both directions?
>
>
> [Qin-1]: I see your point. I think in case of provider-managed or 
> co-managed connection, QoS profile are applied to both direction based 
> on the second paragraph of section 6.12.2.2, that means the parameter 
> “direction” is set to “both”.
>
> In case of customer-managed connection, QoS profile is applied to the 
> direction from SP network to the customer site, that means the 
> parameter “direction” should be set to “WAN-to-Site”.
>
> That’ why we think there is actually incorrect about the current text. 
> Note that “direction” is just optional parameter in this model.
>
> On the other hand, if we want to enhance the current text, we might 
> consider:
>
> 1.allow direction at network access level to override the parameter in 
> the site level.
>
> 2.Use “direction” condition to replace “provider-managed, co-managed, 
> customer-managed” condition in the text and allow more flexibility to 
> apply QoS profile to appropriate traffic direction.
>
> But I like to talk to the design team for this first.
>
>
> [DB2] Ok - option 2 would be my preference but lets see what others think.
>
> [Qin-2]:ok, I have asked design team to express on the list if they 
> have different opinion.
>
>
>
> > 12. The value carried in the svc-mtu leaf is now described more 
> clearly, but its intended
>
> >     use is still unclear, at least to me.  Would something like the following be 
> correct?  If
>
> >     not, what is the correct expression of how to interpret this leaf?
>
> >    "For a given VPN service, the service provider may discard (or for IPv4, may fragment)
>
> >     packets that are longer than the smallest svc-mtu across all 
> site-network-accesses for
>
> >     all sites in the VPN."
>
> We think that SPs are used to the concept of link MTU. svc-mtu 
> modifies the link MTU for the site-access links within the scope of a 
> particular service. We think that an SP will know exactly how to 
> handle packets that exceed MTU values
>
>
> [DB]
> Ok, so the intent is that this is just local to the 
> site-network-access.  I.e. we could say: "Packets transmitted over the 
> site-network-access that are longer than the svc-mtu may be discarded 
> (or for IPv4, fragmented)."
>
> [Qin-1]: I would prefer to leave this up to SP to determine how to 
> deal with MTU exceeding, we can not limited only to discard or 
> fragmented, does this make sense?
>
>
> [DB2] Yes - that is why I said "may be discarded" instead of "must be 
> discarded".  With my suggested text, it is still up to SP to determine 
> how to handle it, but we are providing some warning for the customer.
>
> [Qin-2]:I still feel this model is just a service model which is not 
> directly code implemented on the network device to control the network 
> operation. I am reluctant to add this lower layer constraint to the 
> service parameter in the service model. SP may instruct the management 
> system to provision the network device with appropriate policy.
>

[DB3] I completely agree; my point is to provide some information to the 
customer about how the service might behave if they request a particular 
value for the MTU.


     David


> > 13. In the new filters container, there is a list of filters indexed by type (ipv4, 
> ipv6,
>
> >     lan-tag, or vpn-policy-filter-type).  Each filter contains a leaf-list of IPv4 
> prefixes,
>
> >     a leaf-list of ipv6 prefixes and a leaf-list of lan-tags.  Is the intent that the 
> contents
>
> >     of the filter matches the type?  There is nothing to enforce that currently 
> - should
>
> >     there be a "when" statement for each leaf-list, to restrict it to only the case
>
> >     where the type is appropriate (e.g. the ipv4-lan-prefix leaf-list would have
>
> >     "when ../type = ipv4")?
>
> >     I don't really understand what this new filter list achieves over having a single
>
> >     filter that could contain a mix of ipv4 prefixes, ipv6 prefixes and lan-tags.  What's
>
> >     the advantage of 3 filters each containing a single type over one filter 
> containing
>
> >     all three types?
>
> RFC 8049 allowed multiple filters of any one type, but not a mix of 
> filters of different types. That's now fixed.
>
>
> [DB]
> Right, I was comparing to the previous version of 8049bis rather than 
> to RFC8049 (which I agree did not allow a mix of prefixes and LAN tags).
>
>
> [Qin-1]With the old version of RFC8049, you still can have a mix of 
> prefixes and LAN tags, with two entries instead of single entry
>
> “
>
>       <entries>
>
>        <id>ENTRY1</id>
>
>        <filter>
>
>         <lan-tag>LAN1</lan-tag>
>
>        </filter>
>
>        <vpn>
>
>         <vpn-id>VPN2</vpn-id>
>
> <site-role>hub-role</site-role>
>
>        </vpn>
>
>       </entries>
>
>       <entries>
>
>        <id>ENTRY2</id>
>
>        <filter>
>
> <ipv4-lan-prefix>LAN2</ipv4-lan-prefix>
>
>        </filter>
>
>        <vpn>
>
>         <vpn-id>VPN2</vpn-id>
>
> <site-role>any-to-any-role</site-role>
>
>        </vpn>
>
>       </entries>
>
> ”
>
>
> With the new version, you could have data like this:
>
> <filters>
>   <filter>
>     <type>lan</type>
> <ipv4-lan-prefix>10.0.0.0/24</ipv4-lan-prefix> // IPv4 prefix 
> specified even though type is lan
>   </filter>
>   <filter>
>     <type>ipv4</type>
> <ipv6-lan-prefix>10::0/64</ipv6-lan-prefix> // IPv6 prefix and lan tag 
> specified even though type is ipv4
>     <lan-tag>foo</lan-tag>
>   </filter>
> </filters>
>
> [Qin-1]: This can be easily fixed by add when statement, e.g.,
>
> when "derived-from-or-self(../type, 'l3vpn-svc:ipv4')" {
>
>          description
>
>          "Only applies when vpn policy filter is ipv4-lan-prefix.";
>
>         }
>
>
> [DB2] Yes, adding 'when' statements would also work.
>
> [Qin-2]: Thanks.
>
>
> I think the aim could be achieved with a single filter that contains 
> leaf-lists for IPv4, Ipv6 and lan tags, i.e.:
>
> container filter {
>   leaf-list ipv4-lan-prefix { type inet:ipv4-prefix; }
>   leaf-list ipv6-lan-prefix { type inet:ipv6-prefix; }
>   leaf-list lan-tag { type string; }
> }
>
> This allows full flexibility, i.e. a filter can have zero or more IPv4 
> prefixes, zero or more IPv6 prefixes and zero or more LAN tags.
>
> [Qin]: Similar to our design team's proposal in the new version, but 
> ipv4 and ipv6 and lan-tag are not of the same type. put them in the 
> same container seems weird,J.
>
> Our proposal follow similar construct proposed for " routing-protocol" 
> list in this model.
>
> > 15. For the site-network-access connection addressing, ip-connection/ipv4/address-
>
> >   allocation-type is optional with no default, but 
> ip-connection/ipv6/address-allocation-
>
> >    type has a default defined (static-addressing).  This means it's impossible to 
> have a
>
> >   site-network-access that only uses IPv4 addressing.  I think the 
> default should be
>
> >    deleted in the IPv6 case, so that an IPv4-only site-network-access could be
>
> >    represented by simply not setting the IPv6 address-allocation-type.
>
> Good catch, to get consistent with original RFC8049, I would propose 
> to add the default for ipv4-only site-network-access as well.
>
> Note that we use "feature" for both ipv4 case and ipv6 case.
>
>
> [DB]
> Using "feature" doesn't solve the problem, since that turns IPv4 or 
> IPv6 on or off for every service.  However, the SP might have some 
> IPv4-only services and some IPv6-only services.  So, they need to 
> advertise both features, but they also need a way to not specify an 
> IPv6 connection address for the IPv4-only services, and to not specify 
> an IPv4 connection address for the IPv6-only services.
> So, I believe the best solution is to delete the default for the 
> address-allocation-type in both cases.
>
> [Qin-1]: I am fine to delete both default values, but
>
> RFC7950 section 7.6.1 said:
>
> "
>
> Note that if the leaf or any of its ancestors has a "when" condition
>
> or "if-feature" expression that evaluates to "false", then the
>
> default value is not in use.
>
> "
>
> To my understanding, if the server doesn’t support one feature or 
> advertise one feature, the default value will not in use.
>
> If the server advertise both features, it doesn’t say default value 
> for each feature MUST be specified.
>
> So if both features can be supported, is there any reason we only 
> specify only IPv6 connection or IPv4 connection?
>
>
> [DB2] The difference is that features apply across the whole server - 
> if the ipv4 feature is disabled, then the server cannot support IPv4 
> at all, and there can be *no* services with IPv4.  However, the case I 
> was describing is different - in this case, there are some services 
> that support IPv4 and some that do not.  For example, the SP might 
> offer an IPv4 product, and IPv6 product and a dual-stack product, 
> where the dual-stack product is more expensive.  So some customers 
> might choose IPv4-only or IPv6-only - or a particular customer might 
> choose a mix of ipv4-only and ipv6-only services.  This is why I think 
> the default should be deleted in both cases.
>
> [Qin-2]:Sounds reasonable to me, I will delete default if there is no 
> one against it.
>     David
>
>
>
>
>     David
>
>
>
>
> Thanks for your time and effort.
>
> Qin
>
> On 09/08/2017 11:40, Qin Wu wrote:
>
>     Here is the update to draft-wu-l3sm-rfc8049bis-02 based on
>     additional discussion on the list.
>
>     https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt
>
>     Thank David for additional comments. Thank Design team to help
>     address these comments.
>
>     The main changes include:
>
>     1.Clarify the rational of the model in the section 5 based on
>     David's comment.
>
>     2.Add multi-filter and multi-VPN per entry support for VPN policy.
>
>     3.Modify description for svc-input-bandwidth leaf and svc-output-
>
>     Bandwidth leaf to address inconsistency issue with the text in
>     section 6.12.1.
>
>     4. Add text to clarify the way to achieve Per-VPN QoS policy.
>
>     5. Remove address-scope-type since there is no common
>     understanding on this.
>
>     6. Modify the description of autonomous-system under container “BGP”to address David's comment on AS.
>
>     Regarding provider address and mask to the model for the DHCP and
>     DHCP relay cases, talking with design team members,
>
>     We believe these parameters are the one requested by Customer to
>     Provider and therefore we keep it in the model.
>
>     Regarding Number of BGP sessions, eBGP multihop between loopbacks
>     and other similar issue, The design team agreed that it is not
>
>     reasonable to enumerate all the cases this models doesn't support.
>     The current text has been clear about this.
>
>     We believe that we have address all the comments. Thanks!
>
>     -Qin
>
>     -----邮件原件-----
>
>     发件人: internet-drafts@ietf.org <mailto:internet-drafts@ietf.org>
>     [mailto:internet-drafts@ietf.org]
>
>     发送时间: 2017年8月9日18:20
>
>     收件人: Qin Wu; Luis Tomotaki; Kenichi Ogaki; Stephane Litkowski
>
>     主题: New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
>
>     A new version of I-D, draft-wu-l3sm-rfc8049bis-02.txt has been
>     successfully submitted by Qin Wu and posted to the IETF repository.
>
>     Name:            draft-wu-l3sm-rfc8049bis
>
>     Revision: 02
>
>     Title:           YANG Data Model for L3VPN Service Delivery
>
>     Document date:   2017-08-09
>
>     Group:           Individual Submission
>
>     Pages:           181
>
>     URL:
>     https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt
>
>     Status: https://datatracker.ietf.org/doc/draft-wu-l3sm-rfc8049bis/
>
>     Htmlized: https://tools.ietf.org/html/draft-wu-l3sm-rfc8049bis-02
>
>     Htmlized:
>     https://datatracker.ietf.org/doc/html/draft-wu-l3sm-rfc8049bis-02
>
>     Diff: https://www.ietf.org/rfcdiff?url2=draft-wu-l3sm-rfc8049bis-02
>
>     Abstract:
>
>        This document defines a YANG data model that can be used for
>
>        communication between customers and network operators and to
>     deliver
>
>        a Layer 3 provider-provisioned VPN service.  This document is
>     limited
>
>        to BGP PE-based VPNs as described in RFCs 4026, 4110, and
>     4364.  This
>
>        model is intended to be instantiated at the management system to
>
>        deliver the overall service.  It is not a configuration model to be
>
>        used directly on network elements.  This model provides an
>     abstracted
>
>        view of the Layer 3 IP VPN service configuration components. 
>     It will
>
>        be up to the management system to take this model as input and use
>
>        specific configuration models to configure the different network
>
>        elements to deliver the service.  How the configuration of network
>
>        elements is done is out of scope for this document.
>
>        If approved, this document obsoletes RFC 8049.  The changes are a
>
>        series of small fixes to the YANG module, and some
>     clarifications to
>
>        the text.
>
>     Please note that it may take a couple of minutes from the time of
>     submission until the htmlized version and diff are available at
>     tools.ietf.org.
>
>     The IETF Secretariat
>
>     _______________________________________________
>
>     L3sm mailing list
>
>     L3sm@ietf.org <mailto:L3sm@ietf.org>
>
>     https://www.ietf.org/mailman/listinfo/l3sm
>
>
>
>
>
> -- 
> David Ball
> <daviball@cisco.com> <mailto:daviball@cisco.com>
>
>
>
>
> -- 
> David Ball
> <daviball@cisco.com> <mailto:daviball@cisco.com>
>
>
>
> -- 
> David Ball
> <daviball@cisco.com> <mailto:daviball@cisco.com>

-- 
David Ball
<daviball@cisco.com>


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    <p><font face="Helvetica, Arial, sans-serif">Thanks - a couple more
        comments inline with [DB3]:<br>
      </font></p>
    <br>
    <div class="moz-cite-prefix">On 25/08/2017 07:18, Qin Wu wrote:<br>
    </div>
    <blockquote type="cite"
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            <p class="MsoNormal"><b><span
                  style="font-size:10.0pt;color:windowtext">发件人<span
                    lang="EN-US">:</span></span></b><span
                style="font-size:10.0pt;color:windowtext" lang="EN-US">
                L3sm [<a class="moz-txt-link-freetext" href="mailto:l3sm-bounces@ietf.org">mailto:l3sm-bounces@ietf.org</a>]
              </span><b><span style="font-size:10.0pt;color:windowtext">代表
                </span></b><span
                style="font-size:10.0pt;color:windowtext" lang="EN-US">David
                Ball<br>
              </span><b><span style="font-size:10.0pt;color:windowtext">发送时间<span
                    lang="EN-US">:</span></span></b><span
                style="font-size:10.0pt;color:windowtext" lang="EN-US">
                2017</span><span
                style="font-size:10.0pt;color:windowtext">年<span
                  lang="EN-US">8</span>月<span lang="EN-US">24</span>日<span
                  lang="EN-US"> 17:52<br>
                </span><b>收件人<span lang="EN-US">:</span></b><span
                  lang="EN-US"> Qin Wu; <a class="moz-txt-link-abbreviated" href="mailto:l3sm@ietf.org">l3sm@ietf.org</a><br>
                </span><b>抄送<span lang="EN-US">:</span></b><span
                  lang="EN-US"> Stephane Litkowski; Kenichi Ogaki;
                  <a class="moz-txt-link-abbreviated" href="mailto:adrian@olddog.co.uk">adrian@olddog.co.uk</a><br>
                </span><b>主题<span lang="EN-US">:</span></b><span
                  lang="EN-US"> Re: [L3sm] New Version Notification for
                  draft-wu-l3sm-rfc8049bis-02.txt<o:p></o:p></span></span></p>
          </div>
        </div>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <p><span
            style="font-family:&quot;Helvetica&quot;,&quot;sans-serif&quot;"
            lang="EN-US">Thanks - more inline with [DB2]:</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
        <div>
          <p class="MsoNormal"><span lang="EN-US">On 24/08/2017 04:26,
              Qin Wu wrote:<o:p></o:p></span></p>
        </div>
        <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
              lang="EN-US">Thank David for follow up comments. See my
              reply inline below marked with [Qin-1].</span><span
              lang="EN-US"><o:p></o:p></span></p>
          <div>
            <div style="border:none;border-top:solid #B5C4DF
              1.0pt;padding:3.0pt 0cm 0cm 0cm">
              <p class="MsoNormal"><b><span
                    style="font-size:10.0pt;color:windowtext">发件人<span
                      lang="EN-US">:</span></span></b><span
                  style="font-size:10.0pt;color:windowtext" lang="EN-US">
                  David Ball [<a href="mailto:daviball@cisco.com"
                    moz-do-not-send="true">mailto:daviball@cisco.com</a>]
                  <br>
                </span><b><span
                    style="font-size:10.0pt;color:windowtext">发送时间<span
                      lang="EN-US">:</span></span></b><span
                  style="font-size:10.0pt;color:windowtext" lang="EN-US">
                  2017</span><span
                  style="font-size:10.0pt;color:windowtext">年<span
                    lang="EN-US">8</span>月<span lang="EN-US">23</span>日<span
                    lang="EN-US"> 20:22<br>
                  </span><b>收件人<span lang="EN-US">:</span></b><span
                    lang="EN-US"> Qin Wu; <a
                      href="mailto:l3sm@ietf.org" moz-do-not-send="true">
                      l3sm@ietf.org</a><br>
                  </span><b>抄送<span lang="EN-US">:</span></b><span
                    lang="EN-US"> Stephane Litkowski; Kenichi Ogaki;
                    <a href="mailto:adrian@olddog.co.uk"
                      moz-do-not-send="true">adrian@olddog.co.uk</a><br>
                  </span><b>主题<span lang="EN-US">:</span></b><span
                    lang="EN-US"> Re: [L3sm] New Version Notification
                    for draft-wu-l3sm-rfc8049bis-02.txt</span></span><span
                  lang="EN-US"><o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
          <p><span
              style="font-family:&quot;Helvetica&quot;,&quot;sans-serif&quot;"
              lang="EN-US">Thanks Qin, I think most of the comments are
              being addressed.  Some responses below, I've snipped out
              the ones where we have agreement.</span><span lang="EN-US"><o:p></o:p></span></p>
          <p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
          <div>
            <p class="MsoNormal"><span lang="EN-US">On 21/08/2017 07:47,
                Qin Wu wrote:<o:p></o:p></span></p>
          </div>
          <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
            <p class="MsoNormal"><span style="color:#1F497D"
                lang="EN-US"> </span><span lang="EN-US">
                <o:p></o:p></span></p>
            <p><span style="color:#1F497D" lang="EN-US">&gt; 2. In
                section 6.3, I think we can add a statement like:
                "Multiple locations can be associated</span><span
                lang="EN-US"><o:p></o:p></span></p>
            <p><span style="color:#1F497D" lang="EN-US">&gt;     with a
                single site, but a particular location cannot be
                associated with more than one site."</span><span
                lang="EN-US"><o:p></o:p></span></p>
            <p><span style="color:#1F497D" lang="EN-US">&gt;   
                (Personally I don't see the need for this restriction,
                but this sentence is based on the</span><span
                lang="EN-US"><o:p></o:p></span></p>
            <p><span style="color:#1F497D" lang="EN-US">&gt;     
                previous discussion).</span><span lang="EN-US"><o:p></o:p></span></p>
            <p><span style="color:#1F497D" lang="EN-US"> </span><span
                lang="EN-US"><o:p></o:p></span></p>
            <p><span style="color:#1F497D" lang="EN-US">We will not be
                making this change (which seems consistent with your
                view). A location is a description of a physical
                location, while a site is part of a service (i.e., a
                CE). There is no reason to prohibit a service having two
                co-located CEs. And, of course, two different services
                could have sites at a single location.</span><span
                lang="EN-US"><o:p></o:p></span></p>
          </blockquote>
          <p class="MsoNormal"><span lang="EN-US"><br>
              [DB]<br>
              Ok - in that case, for clarity, can we make the opposite
              statement: "Multiple locations can be associated with a
              single site; similarly, a particular location can be
              associated with more than one site."<br>
              <br>
              <br>
              <o:p></o:p></span></p>
          <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
              lang="EN-US"> </span><span lang="EN-US"><o:p></o:p></span></p>
          <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">[Qin-1]:The
              statement we like to put is: Each site is associated with
              one location or more locations.</span><span lang="EN-US"><o:p></o:p></span></p>
        </blockquote>
        <p class="MsoNormal"><span lang="EN-US"><br>
          </span><span style="color:#660000" lang="EN-US">[DB2] I think
            we already say that; but it is the converse I would like to
            add, i.e. each location can have one or more sites.<br>
          </span><span lang="EN-US"><br>
          </span><span style="color:#1F497D" lang="EN-US">[Qin-2]:I
            think the text MUST be consistent with the model. In the
            model, the site and location are organized as:</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">One site can have one or more location. Not the
            other way around, in the text, we can see multi-location
            site is one typical example that is discussed in the draft.
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"> </span><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">“<o:p></o:p></span></p>
        <p class="MsoNormal" style="page-break-before:always"><span
            style="font-size:7.5pt;color:windowtext" lang="EN">     
            +--rw sites<o:p></o:p></span></p>
        <p class="MsoNormal" style="page-break-before:always"><span
            style="font-size:7.5pt;color:windowtext" lang="EN">       
            +--rw site* [site-id]<o:p></o:p></span></p>
        <p class="MsoNormal" style="page-break-before:always"><span
            style="font-size:7.5pt;color:windowtext" lang="EN">        
            +--rw site-id         svc-id<o:p></o:p></span></p>
        <p class="MsoNormal" style="page-break-before:always"><span
            style="font-size:7.5pt;color:windowtext" lang="EN">        
            +--rw requested-site-start?  yang:date-and-time<o:p></o:p></span></p>
        <p class="MsoNormal" style="page-break-before:always"><span
            style="font-size:7.5pt;color:windowtext" lang="EN">        
            +--rw requested-site-stop?   yang:date-and-time<o:p></o:p></span></p>
        <p class="MsoNormal" style="page-break-before:always"><span
            style="font-size:7.5pt;color:windowtext" lang="EN">        
            +--rw locations<o:p></o:p></span></p>
        <p class="MsoNormal" style="page-break-before:always"><span
            style="font-size:7.5pt;color:windowtext" lang="EN">        
            | +--rw location* [location-id]<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">”<o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">Considering consistency and clarity, I think we
            should use statement I mentioned above previously.</span></p>
      </div>
    </blockquote>
    <br>
    <font color="#006600">[DB3]<br>
      Ok, but I think that's just a phrasing issue.  Would you be
      happier adding "Two or more sites can be associated with the same
      location, by referencing the same location ID"?</font><br>
    <br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AAD04B2@nkgeml513-mbx.china.huawei.com">
      <div class="WordSection1">
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US">[Note: I came to the
            conclusion above based on the previous discussion about
            SubVPN, where you said site-network-accesses in different
            sites couldn't share physical components because different
            sites would be associated with different locations.  If
            multiple sites are allowed to be associated with the same
            location, then they could also share some physical
            components, right?]<br>
            <br>
          </span><span style="color:#1F497D" lang="EN-US">[Qin]: Sure,
            you can use " same-bearer</span><span lang="EN-US">
          </span><span style="color:#1F497D" lang="EN-US">" attribute to
            express that constraint the relationship between source
            site-network-access and target site-network-access.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
            <br>
            <br>
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">&gt;
            9. In section 6.12.2.2, the second paragraph needs to be
            updated (or</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     deleted?)
            now that you have added the "direction" leaf.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"> </span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">We don't believe
            there is anything actually incorrect about the current text.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
            [DB]<br>
            Ok, in that case I don't understand it. :)  Suppose there is
            a provider-managed connection with a qos-profile, and the
            direction in the qos profile is set to Site-to-WAN.  The
            second paragraph says: "the provider should ensure
            scheduling according to the requested policy in both traffic
            directions", but the description of the direction says:
            "used to specify the direction which qos profile is applied
            to".  Since the direction is Site-to-WAN in this example,
            this means the profile would only be applied in that
            direction, not in both directions.  That seems to contradict
            the previous text that says it should be applied in both
            directions?<br>
            <br>
            <br>
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">[Qin-1]: I see your point. I think in case of
            provider-managed or co-managed connection, QoS profile are
            applied to both direction based on the second paragraph of
            section 6.12.2.2, that means the parameter “direction” is
            set to “both”.</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">In case of customer-managed connection, QoS
            profile is applied to the direction from SP network to the
            customer site, that means the parameter “direction” should
            be set to “WAN-to-Site”.</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">That’ why we think there is actually incorrect
            about the current text. Note that “direction” is just
            optional parameter in this model.</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"> </span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">On the other hand, if we want to enhance the
            current text, we might consider:</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoListParagraph"
          style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l0
          level1 lfo2">
          <!--[if !supportLists]--><span lang="EN-US"><span
              style="mso-list:Ignore">1.<span style="font:7.0pt
                &quot;Times New Roman&quot;"> 
              </span></span></span><!--[endif]--><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">allow direction at network access level to
            override the parameter in the site level.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoListParagraph"
          style="margin-left:18.0pt;text-indent:-18.0pt;mso-list:l0
          level1 lfo2">
          <!--[if !supportLists]--><span lang="EN-US"><span
              style="mso-list:Ignore">2.<span style="font:7.0pt
                &quot;Times New Roman&quot;"> 
              </span></span></span><!--[endif]--><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">Use “direction” condition to replace
            “provider-managed, co-managed, customer-managed” condition
            in the text and allow more flexibility to apply QoS profile
            to appropriate traffic direction.</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">But I like to talk to the design team for this
            first.</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
          </span><span style="color:#660000" lang="EN-US">[DB2] Ok -
            option 2 would be my preference but lets see what others
            think.<br>
          </span><span lang="EN-US"><br>
          </span><span style="color:#1F497D" lang="EN-US">[Qin-2]:ok, I
            have asked design team to express on the list if they have
            different opinion.</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"><br>
            <br>
          </span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">&gt;
            12. The value carried in the svc-mtu leaf is now described
            more clearly, but its intended</span><span lang="EN-US">
            <o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     use is
            still unclear, at least to me.  Would something like the
            following be correct?  If</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     not, what
            is the correct expression of how to interpret this leaf?</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    "For a given
            VPN service, the service provider may discard (or for IPv4,
            may fragment)</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     packets
            that are longer than the smallest svc-mtu across all
            site-network-accesses for</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     all sites
            in the VPN."</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"> </span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">We think that SPs
            are used to the concept of link MTU. svc-mtu modifies the
            link MTU for the site-access links within the scope of a
            particular service. We think that an SP will know exactly
            how to handle packets that exceed MTU values</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
            [DB]<br>
            Ok, so the intent is that this is just local to the
            site-network-access.  I.e. we could say: "Packets
            transmitted over the site-network-access that are longer
            than the svc-mtu may be discarded (or for IPv4,
            fragmented)."<br>
            <br>
          </span><span style="color:#1F497D" lang="EN-US">[Qin-1]: I
            would prefer to leave this up to SP to determine how to deal
            with MTU exceeding, we can not limited only to discard or
            fragmented, does this make sense?</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
          </span><span style="color:#660000" lang="EN-US">[DB2] Yes -
            that is why I said "may be discarded" instead of "must be
            discarded".  With my suggested text, it is still up to SP to
            determine how to handle it, but we are providing some
            warning for the customer.</span><span lang="EN-US"><br>
            <br>
          </span><span style="color:#1F497D" lang="EN-US">[Qin-2]:I
            still feel this model is just a service model which is not
            directly code implemented on the network device to control
            the network operation. I am reluctant to add this lower
            layer constraint to the service parameter in the service
            model. SP may instruct the management system to provision
            the network device with appropriate policy.</span></p>
      </div>
    </blockquote>
    <br>
    <font color="#006600">[DB3] I completely agree; my point is to
      provide some information to the customer about how the service
      might behave if they request a particular value for the MTU.</font><br>
    <br>
    <br>
        David<br>
    <br>
    <br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AAD04B2@nkgeml513-mbx.china.huawei.com">
      <div class="WordSection1">
        <p class="MsoNormal"><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt; 13. In the new
            filters container, there is a list of filters indexed by
            type (ipv4, ipv6,</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     lan-tag, or
            vpn-policy-filter-type).  Each filter contains a leaf-list
            of IPv4 prefixes,</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     a leaf-list
            of ipv6 prefixes and a leaf-list of lan-tags.  Is the intent
            that the contents</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     of the
            filter matches the type?  There is nothing to enforce that
            currently - should</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     there be a
            "when" statement for each leaf-list, to restrict it to only
            the case</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     where the
            type is appropriate (e.g. the ipv4-lan-prefix leaf-list
            would have
          </span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     "when
            ../type = ipv4")?</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     I don't
            really understand what this new filter list achieves over
            having a single</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     filter that
            could contain a mix of ipv4 prefixes, ipv6 prefixes and
            lan-tags.  What's</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     the
            advantage of 3 filters each containing a single type over
            one filter containing</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;     all three
            types?</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"> </span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">RFC 8049 allowed
            multiple filters of any one type, but not a mix of filters
            of different types. That's now fixed.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
            [DB]<br>
            Right, I was comparing to the previous version of 8049bis
            rather than to RFC8049 (which I agree did not allow a mix of
            prefixes and LAN tags).<br>
            <br>
            <br>
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">[Qin-1]With the old version of RFC8049, you
            still can have a mix of prefixes and LAN tags, with two
            entries instead of single entry</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">“</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      &lt;entries&gt;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;id&gt;ENTRY1&lt;/id&gt;</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;filter&gt;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">        &lt;lan-tag&gt;LAN1&lt;/lan-tag&gt;</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;/filter&gt;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;vpn&gt;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">        &lt;vpn-id&gt;VPN2&lt;/vpn-id&gt;</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       
            &lt;site-role&gt;hub-role&lt;/site-role&gt;</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;/vpn&gt;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      &lt;/entries&gt;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      &lt;entries&gt;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;id&gt;ENTRY2&lt;/id&gt;</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;filter&gt;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       
            &lt;ipv4-lan-prefix&gt;LAN2&lt;/ipv4-lan-prefix&gt;</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;/filter&gt;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;vpn&gt;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">        &lt;vpn-id&gt;VPN2&lt;/vpn-id&gt;</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       
            &lt;site-role&gt;any-to-any-role&lt;/site-role&gt;</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">       &lt;/vpn&gt;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">      &lt;/entries&gt;</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">”</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
            With the new version, you could have data like this:<br>
            <br>
            <tt>&lt;filters&gt;</tt><br>
            <tt>  &lt;filter&gt;</tt><br>
            <tt>    &lt;type&gt;lan&lt;/type&gt;</tt><br>
            <tt>   
              &lt;ipv4-lan-prefix&gt;10.0.0.0/24&lt;/ipv4-lan-prefix&gt; 
              // IPv4 prefix specified even though type is lan</tt><br>
            <tt>  &lt;/filter&gt;</tt><br>
            <tt>  &lt;filter&gt;</tt><br>
            <tt>    &lt;type&gt;ipv4&lt;/type&gt;</tt><br>
            <tt>   
              &lt;ipv6-lan-prefix&gt;10::0/64&lt;/ipv6-lan-prefix&gt; 
              // IPv6 prefix and lan tag specified even though type is
              ipv4</tt><br>
            <tt>    &lt;lan-tag&gt;foo&lt;/lan-tag&gt;</tt><br>
            <tt>  &lt;/filter&gt;</tt><br>
            <tt>&lt;/filters&gt;</tt><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US"> </span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">[Qin-1]: This can be easily fixed by add when
            statement, e.g.,</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal" style="text-indent:15.75pt"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">when "derived-from-or-self(../type,
            'l3vpn-svc:ipv4')" {</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">         description</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">         "Only applies when vpn policy filter
            is ipv4-lan-prefix.";</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span
style="font-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"
            lang="EN-US">        }</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
          </span><span style="color:#660000" lang="EN-US">[DB2] Yes,
            adding 'when' statements would also work.</span><span
            lang="EN-US"><br>
            <br>
          </span><span style="color:#1F497D" lang="EN-US">[Qin-2]:
            Thanks.</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
            I think the aim could be achieved with a single filter that
            contains leaf-lists for IPv4, Ipv6 and lan tags, i.e.:<br>
            <br>
            <tt>container filter {</tt><br>
            <tt>  leaf-list ipv4-lan-prefix { type inet:ipv4-prefix; }</tt><br>
            <tt>  leaf-list ipv6-lan-prefix { type inet:ipv6-prefix; }</tt><br>
            <tt>  leaf-list lan-tag { type string; }</tt><br>
            <tt>}</tt><br>
            <br>
            This allows full flexibility, i.e. a filter can have zero or
            more IPv4 prefixes, zero or more IPv6 prefixes and zero or
            more LAN tags.<br>
            <br>
          </span><span style="color:#1F497D" lang="EN-US">[Qin]: Similar
            to our design team's proposal in the new version, but ipv4
            and ipv6 and lan-tag are not of the same type. put them in
            the same container seems weird,</span><span
            style="font-family:Wingdings;color:#1F497D" lang="EN-US">J</span><span
            style="color:#1F497D" lang="EN-US">.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">Our
            proposal follow similar construct proposed for "
            routing-protocol</span><span lang="EN-US">
          </span><span style="color:#1F497D" lang="EN-US">" list in this
            model.</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt; 15. For the
            site-network-access connection addressing,
            ip-connection/ipv4/address-</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;   
            allocation-type is optional with no default, but
            ip-connection/ipv6/address-allocation-</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    type has a
            default defined (static-addressing).  This means it's
            impossible to have a</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;   
            site-network-access that only uses IPv4 addressing.  I think
            the default should be</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    deleted in
            the IPv6 case, so that an IPv4-only site-network-access
            could be</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">&gt;    represented
            by simply not setting the IPv6 address-allocation-type.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"> </span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">Good catch, to get
            consistent with original RFC8049, I would propose to add the
            default for ipv4-only site-network-access as well.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">Note that we use
            "feature" for both ipv4 case and ipv6 case.</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
            [DB]<br>
            Using "feature" doesn't solve the problem, since that turns
            IPv4 or IPv6 on or off for every service.  However, the SP
            might have some IPv4-only services and some IPv6-only
            services.  So, they need to advertise both features, but
            they also need a way to not specify an IPv6 connection
            address for the IPv4-only services, and to not specify an
            IPv4 connection address for the IPv6-only services.<br>
            So, I believe the best solution is to delete the default for
            the address-allocation-type in both cases.<br>
            <br>
          </span><span style="color:#1F497D" lang="EN-US">[Qin-1]: I am
            fine to delete both default values, but</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">RFC7950
            section 7.6.1 said:</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">"</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">  
            Note that if the leaf or any of its ancestors has a "when"
            condition</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">  
            or "if-feature" expression that evaluates to "false", then
            the</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">  
            default value is not in use.</span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">"</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">To
            my understanding, if the server doesn</span><span
            style="color:#1F497D">’<span lang="EN-US">t support one
              feature or advertise one feature, the default value will
              not in use.</span></span><span lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">If
            the server advertise both features, it doesn</span><span
            style="color:#1F497D">’<span lang="EN-US">t say default
              value for each feature MUST be specified.</span></span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">So
            if both features can be supported, is there any reason we
            only specify only IPv6 connection or IPv4 connection?</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#660000" lang="EN-US"><br>
            [DB2] The difference is that features apply across the whole
            server - if the ipv4 feature is disabled, then the server
            cannot support IPv4 at all, and there can be
            <b>no</b> services with IPv4.  However, the case I was
            describing is different - in this case, there are some
            services that support IPv4 and some that do not.  For
            example, the SP might offer an IPv4 product, and IPv6
            product and a dual-stack product, where the dual-stack
            product is more expensive.  So some customers might choose
            IPv4-only or IPv6-only - or a particular customer might
            choose a mix of ipv4-only and ipv6-only services.  This is
            why I think the default should be deleted in both cases.</span><span
            lang="EN-US"><br>
            <br>
          </span><span style="color:#1F497D" lang="EN-US">[Qin-2]:Sounds
            reasonable to me, I will delete default if there is no one
            against it.</span><span lang="EN-US"><br>
                David<br>
            <br>
            <br>
            <br>
            <o:p></o:p></span></p>
        <p class="MsoNormal"><span lang="EN-US"><br>
                David<br>
            <br>
            <br>
            <br>
            <br>
            <o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"> </span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">Thanks for your time
            and effort.</span><span lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US"> </span><span
            lang="EN-US"><o:p></o:p></span></p>
        <p><span style="color:#1F497D" lang="EN-US">Qin</span><span
            lang="EN-US"><o:p></o:p></span></p>
        <div>
          <p class="MsoNormal"><span lang="EN-US">On 09/08/2017 11:40,
              Qin Wu wrote:<o:p></o:p></span></p>
        </div>
        <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
          <pre><span lang="EN-US">Here is the update to draft-wu-l3sm-rfc8049bis-02 based on additional discussion on the list.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"><a href="https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt" moz-do-not-send="true">https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US">Thank David for additional comments. Thank Design team to help address these comments.<o:p></o:p></span></pre>
          <pre><span lang="EN-US">The main changes include:<o:p></o:p></span></pre>
          <pre><span lang="EN-US">1.Clarify the rational of the model in the section 5 based on David's comment.  <o:p></o:p></span></pre>
          <pre><span lang="EN-US">2.Add multi-filter and multi-VPN per entry support for VPN policy.  <o:p></o:p></span></pre>
          <pre><span lang="EN-US">3.Modify description for svc-input-bandwidth leaf and svc-output- <o:p></o:p></span></pre>
          <pre><span lang="EN-US">Bandwidth leaf to address inconsistency issue with the text in section 6.12.1. <o:p></o:p></span></pre>
          <pre><span lang="EN-US">4. Add text to clarify the way to achieve Per-VPN QoS policy.<o:p></o:p></span></pre>
          <pre><span lang="EN-US">5. Remove address-scope-type since there is no common understanding on this.<o:p></o:p></span></pre>
          <pre><span lang="EN-US">6. Modify the description of autonomous-system under container </span>“<span lang="EN-US">BGP</span>”<span lang="EN-US"> to address David's comment on AS.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">Regarding provider address and mask to the model for the DHCP and DHCP relay cases, talking with design team members,<o:p></o:p></span></pre>
          <pre><span lang="EN-US">We believe these parameters are the one requested by Customer to Provider and therefore we keep it in the model.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">Regarding Number of BGP sessions, eBGP multihop between loopbacks and other similar issue, The design team agreed that it is not<o:p></o:p></span></pre>
          <pre><span lang="EN-US">reasonable to enumerate all the cases this models doesn't support. The current text has been clear about this.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">We believe that we have address all the comments. Thanks!<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">-Qin<o:p></o:p></span></pre>
          <pre><span lang="EN-US">-----</span>邮件原件<span lang="EN-US">-----<o:p></o:p></span></pre>
          <pre>发件人<span lang="EN-US">: <a href="mailto:internet-drafts@ietf.org" moz-do-not-send="true">internet-drafts@ietf.org</a> [<a href="mailto:internet-drafts@ietf.org" moz-do-not-send="true">mailto:internet-drafts@ietf.org</a>] <o:p></o:p></span></pre>
          <pre>发送时间<span lang="EN-US">: 2017</span>年<span lang="EN-US">8</span>月<span lang="EN-US">9</span>日<span lang="EN-US"> 18:20<o:p></o:p></span></pre>
          <pre>收件人<span lang="EN-US">: Qin Wu; Luis Tomotaki; Kenichi Ogaki; Stephane Litkowski<o:p></o:p></span></pre>
          <pre>主题<span lang="EN-US">: New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">A new version of I-D, draft-wu-l3sm-rfc8049bis-02.txt has been successfully submitted by Qin Wu and posted to the IETF repository.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">Name:            draft-wu-l3sm-rfc8049bis<o:p></o:p></span></pre>
          <pre><span lang="EN-US">Revision: 02<o:p></o:p></span></pre>
          <pre><span lang="EN-US">Title:           YANG Data Model for L3VPN Service Delivery<o:p></o:p></span></pre>
          <pre><span lang="EN-US">Document date:   2017-08-09<o:p></o:p></span></pre>
          <pre><span lang="EN-US">Group:           Individual Submission<o:p></o:p></span></pre>
          <pre><span lang="EN-US">Pages:           181<o:p></o:p></span></pre>
          <pre><span lang="EN-US">URL:            <a href="https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt" moz-do-not-send="true">https://www.ietf.org/internet-drafts/draft-wu-l3sm-rfc8049bis-02.txt</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US">Status:         <a href="https://datatracker.ietf.org/doc/draft-wu-l3sm-rfc8049bis/" moz-do-not-send="true">https://datatracker.ietf.org/doc/draft-wu-l3sm-rfc8049bis/</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US">Htmlized:       <a href="https://tools.ietf.org/html/draft-wu-l3sm-rfc8049bis-02" moz-do-not-send="true">https://tools.ietf.org/html/draft-wu-l3sm-rfc8049bis-02</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US">Htmlized:       <a href="https://datatracker.ietf.org/doc/html/draft-wu-l3sm-rfc8049bis-02" moz-do-not-send="true">https://datatracker.ietf.org/doc/html/draft-wu-l3sm-rfc8049bis-02</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US">Diff:           <a href="https://www.ietf.org/rfcdiff?url2=draft-wu-l3sm-rfc8049bis-02" moz-do-not-send="true">https://www.ietf.org/rfcdiff?url2=draft-wu-l3sm-rfc8049bis-02</a><o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">Abstract:<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   This document defines a YANG data model that can be used for<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   communication between customers and network operators and to deliver<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   a Layer 3 provider-provisioned VPN service.  This document is limited<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   to BGP PE-based VPNs as described in RFCs 4026, 4110, and 4364.  This<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   model is intended to be instantiated at the management system to<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   deliver the overall service.  It is not a configuration model to be<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   used directly on network elements.  This model provides an abstracted<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   view of the Layer 3 IP VPN service configuration components.  It will<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   be up to the management system to take this model as input and use<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   specific configuration models to configure the different network<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   elements to deliver the service.  How the configuration of network<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   elements is done is out of scope for this document.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">   If approved, this document obsoletes RFC 8049.  The changes are a<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   series of small fixes to the YANG module, and some clarifications to<o:p></o:p></span></pre>
          <pre><span lang="EN-US">   the text.<o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US">                                                                                  <o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
          <pre><span lang="EN-US"> <o:p></o:p></span></pre>
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        </blockquote>
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            <br>
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        <pre><span lang="EN-US">-- <o:p></o:p></span></pre>
        <pre><span lang="EN-US">David Ball<o:p></o:p></span></pre>
        <pre><span lang="EN-US"><a href="mailto:daviball@cisco.com" moz-do-not-send="true">&lt;daviball@cisco.com&gt;</a><o:p></o:p></span></pre>
        <p class="MsoNormal"><span lang="EN-US"><br>
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        <pre><span lang="EN-US">-- <o:p></o:p></span></pre>
        <pre><span lang="EN-US">David Ball<o:p></o:p></span></pre>
        <pre><span lang="EN-US"><a href="mailto:daviball@cisco.com" moz-do-not-send="true">&lt;daviball@cisco.com&gt;</a><o:p></o:p></span></pre>
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            <br>
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        <pre><span lang="EN-US">-- <o:p></o:p></span></pre>
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        <pre><span lang="EN-US"><a href="mailto:daviball@cisco.com" moz-do-not-send="true">&lt;daviball@cisco.com&gt;</a><o:p></o:p></span></pre>
      </div>
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    <br>
    <pre class="moz-signature" cols="72">-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com">&lt;daviball@cisco.com&gt;</a></pre>
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To: Qin Wu <bill.wu@huawei.com>, "Ogaki, Kenichi" <ke-oogaki@kddi.com>, "l3sm@ietf.org" <l3sm@ietf.org>
Cc: "'Stephane Litkowski'" <stephane.litkowski@orange.com>, "adrian@olddog.co.uk" <adrian@olddog.co.uk>, "Jan Lindblad (jlindbla)" <jlindbla@cisco.com>
References: <B8F9A780D330094D99AF023C5877DABA9AA5D7A2@nkgeml513-mbx.china.huawei.com> <c76328ad-b71e-b2a3-92a4-b02beac2be7d@cisco.com> <B8F9A780D330094D99AF023C5877DABA9AABA8A4@nkgeml513-mbx.china.huawei.com> <00f001d31b2f$541e6f90$fc5b4eb0$@kddi.com> <7e9655f5-3ae8-11a1-6904-2ab75eb0b1a2@cisco.com> <B8F9A780D330094D99AF023C5877DABA9AACC84F@nkgeml513-mbx.china.huawei.com>
From: David Ball <daviball@cisco.com>
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Date: Fri, 25 Aug 2017 12:03:53 +0100
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Subject: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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Hi Qin,

Looking back at Jan's comments, I think his point was not that the 
leaves should all be mandatory, but that they should either be 
mandatory, or they should have descriptions that explain the meaning if 
they are not present.  So I think we are basically in agreement (I said: 
"Also this use case needs to be mentioned in the description for those 
leaves.") - but I've copied Jan in case I have mis-interpretted what he 
said.

I disagree that the connection subnet is always requested by the 
customer - a very common scenario where this is not the case is for 
residential internet access.  In that case, the addresses used behind 
the CE are typically from private address space, so the customer can be 
confident that they won't conflict with whatever the provider has chosen 
to use (and allocate with DHCP) on the PE/CE link.  Another common case 
is where it is a provider-managed CE, so the connection addressing 
applies to the downstream link from the CE to the customer, not to the 
PE/CE link.  In this case the customer may not have any of their own 
subnets (i.e. everything is directly connected (at L3) to the CE), so 
there is no chance of a conflict.

Thanks,


     David


On 24/08/2017 12:11, Qin Wu wrote:
> -----邮件原件-----
> 发件人: David Ball [mailto:daviball@cisco.com]
> 发送时间: 2017年8月23日 19:48
> 收件人: Ogaki, Kenichi; Qin Wu; l3sm@ietf.org
> 抄送: 'Stephane Litkowski'; adrian@olddog.co.uk
> 主题: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
>
> On 22/08/2017 11:13, Ogaki, Kenichi wrote:
>
>> Hi Qin,
>>
>>>        2. For the connection addresses, the provider's IP address/mask:
>> As for dhcp related provider-addresses and the masks, these are not what SP provides, but the subnet which the customer requests to specify the leased address subnet. Then, these must be configurable.
> So you're saying even when DHCP is used, the customer can request that addresses will be allocated from a specific subnet?  That's not something I've heard of, but ok. :)  These leaves should definitely be optional in that case, as the more normal case is that the customer does not request a specific subnet.  Also this use case needs to be mentioned in the description for those leaves.
>
> [Qin]: Early on in the YANG Doctor review from Jan, one suggestion was to make provider-address and customer-address mandatory parameter.
> https://www.ietf.org/mail-archive/web/l3sm/current/msg00677.html
> We think his point is valid and have implemented his comment.
> Talking with L3SM design team members recently, it has been agreed that all these parameters (irrespective of DHCP case or static case )are basically specified/requested by a customer.
> Otherwise, address conflict occurs between provider-allocated subnets (PE-CE links) and customer-allocated subnets (under CE).
> So for consistency, I think we should make all these parameters as mandatory parameters.
>
>       David
>
>> Thanks,
>> Kenichi
>>
>> -----Original Message-----
>> From: L3sm [mailto:l3sm-bounces@ietf.org] On Behalf Of Qin Wu
>> Sent: Monday, August 21, 2017 5:39 PM
>> To: David Ball; l3sm@ietf.org
>> Cc: Stephane Litkowski; Kenichi Ogaki; adrian@olddog.co.uk
>> Subject: Re: [L3sm] New Version Notification for
>> draft-wu-l3sm-rfc8049bis-02.txt
>>
>>> 11. In accordance with the clarified scope, parts of the model that correspond
>>>         with information provided by the SP need to be marked with "config false".
>>>         I've identified the following, but there might be more.
>>>        1. The list of profiles of various types (i.e. l3vpn-service/vpn-profiles)
>>>        2. For the connection addresses, the provider's IP address/mask:
>>>       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/provider-address
>>>       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/mask
>>>       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/provider-address
>>>       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/mask
>>>       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/provider-address
>>>       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/mask
>>>       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/provider-address
>>>       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/mask
>>>       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/provider-address
>>>       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/mask
>>>       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/addresses/provider-address
>>>       •
>>> l3vpn-service/sites/site/site-network-accesses/site-network-access/ip
>>> -connection/ipv6/addresses/mask
>>    
>>
>> That sounds reasonable.
>>
>> [Qin]: One more comment, we can not put ‘config false’ for
>> l3vpn-service/vpn-profiles, since Config true leafrefs MUST NOT refer
>> to config false data
>>
>> This issue was discussed before, see discussion available at:
>>
>> https://www.ietf.org/mail-archive/web/l3sm/current/msg00683.html
>>
>>
>>
> --
> David Ball
> <daviball@cisco.com>
>

-- 
David Ball
<daviball@cisco.com>


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From: "Jan Lindblad (jlindbla)" <jlindbla@cisco.com>
To: "David Ball -X (daviball - ENSOFT LIMITED at Cisco)" <daviball@cisco.com>
CC: Qin Wu <bill.wu@huawei.com>, "Ogaki, Kenichi" <ke-oogaki@kddi.com>, "l3sm@ietf.org" <l3sm@ietf.org>, Stephane Litkowski <stephane.litkowski@orange.com>, "adrian@olddog.co.uk" <adrian@olddog.co.uk>
Thread-Topic: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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--_000_42D2478F5F734539B25B128AEB6864DFciscocom_--


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From: "ke-oogaki@kddi.com" <ke-oogaki@kddi.com>
To: David Ball <daviball@cisco.com>
CC: Qin Wu <bill.wu@huawei.com>, "l3sm@ietf.org" <l3sm@ietf.org>, "'Stephane Litkowski'" <stephane.litkowski@orange.com>, "adrian@olddog.co.uk" <adrian@olddog.co.uk>, "Jan Lindblad (jlindbla)" <jlindbla@cisco.com>
Thread-Topic: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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Date: Fri, 25 Aug 2017 12:59:42 +0000
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References: <B8F9A780D330094D99AF023C5877DABA9AA5D7A2@nkgeml513-mbx.china.huawei.com> <c76328ad-b71e-b2a3-92a4-b02beac2be7d@cisco.com> <B8F9A780D330094D99AF023C5877DABA9AABA8A4@nkgeml513-mbx.china.huawei.com> <00f001d31b2f$541e6f90$fc5b4eb0$@kddi.com> <7e9655f5-3ae8-11a1-6904-2ab75eb0b1a2@cisco.com> <B8F9A780D330094D99AF023C5877DABA9AACC84F@nkgeml513-mbx.china.huawei.com>, <10a6c195-8959-2d51-ae14-3d93d89f973b@cisco.com>
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From: Qin Wu <bill.wu@huawei.com>
To: David Ball <daviball@cisco.com>, "l3sm@ietf.org" <l3sm@ietf.org>
CC: Stephane Litkowski <stephane.litkowski@orange.com>, Kenichi Ogaki <ke-oogaki@kddi.com>, "adrian@olddog.co.uk" <adrian@olddog.co.uk>
Thread-Topic: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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Subject: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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To: Qin Wu <bill.wu@huawei.com>, "l3sm@ietf.org" <l3sm@ietf.org>
Cc: Stephane Litkowski <stephane.litkowski@orange.com>, Kenichi Ogaki <ke-oogaki@kddi.com>, "adrian@olddog.co.uk" <adrian@olddog.co.uk>
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From: David Ball <daviball@cisco.com>
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Subject: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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Hi Qin,

On 28/08/2017 11:13, Qin Wu wrote:
>
> [DB3] I completely agree; my point is to provide some information to 
> the customer about how the service might behave if they request a 
> particular value for the MTU.
>
> [Qin-3]: I prefer to keep as it does, but if you insist, we can 
> consider to add something like this:
>
> “if the requested svc-mtu cannot be fulfilled, the management system 
> should return a error message indicating the fulfillment is not 
> possible.  How this SHOULD be communicated by the SP to the customer 
> via a mechanism that is out of scope for this document.”
>

This doesn't really address my point.  What does it mean for the 
requested svc-mtu to be fulfilled?  What behaviour is the customer 
actually requesting by setting this leaf to a particular value?


     David

-- 
David Ball
<daviball@cisco.com>


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<html>
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    Hi Qin,<br>
    <br>
    On 28/08/2017 11:13, Qin Wu wrote:<br>
    <blockquote type="cite"
cite="mid:B8F9A780D330094D99AF023C5877DABA9AAD9734@nkgeml513-mbx.china.huawei.com">
      <p class="MsoNormal"><span style="color:#006600" lang="EN-US">[DB3]
          I completely agree; my point is to provide some information to
          the customer about how the service might behave if they
          request a particular value for the MTU.</span><span
          lang="EN-US"><br>
          <br>
        </span><span style="color:#1F497D" lang="EN-US">[Qin-3]: I
          prefer to keep as it does, but if you insist, we can consider
          to add something like this:<o:p></o:p></span></p>
      <p class="MsoNormal"><span style="color:#1F497D">“if the requested
          svc-mtu cannot be fulfilled, the management system should
          return a error message indicating the fulfillment is not
          possible.  How this SHOULD be communicated by the SP to the
          customer via a mechanism that is out of scope for this
          document.”</span></p>
    </blockquote>
    <br>
    This doesn't really address my point.  What does it mean for the
    requested svc-mtu to be fulfilled?  What behaviour is the customer
    actually requesting by setting this leaf to a particular value?<br>
    <br>
    <br>
        David<br>
    <br>
    <pre class="moz-signature" cols="72">-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com">&lt;daviball@cisco.com&gt;</a></pre>
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To: "ke-oogaki@kddi.com" <ke-oogaki@kddi.com>
Cc: Qin Wu <bill.wu@huawei.com>, "l3sm@ietf.org" <l3sm@ietf.org>, "'Stephane Litkowski'" <stephane.litkowski@orange.com>, "adrian@olddog.co.uk" <adrian@olddog.co.uk>, "Jan Lindblad (jlindbla)" <jlindbla@cisco.com>
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From: David Ball <daviball@cisco.com>
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Date: Wed, 30 Aug 2017 12:19:12 +0100
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Subject: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
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Hi Kenichi,


On 25/08/2017 13:59, ke-oogaki@kddi.com wrote:
>
>> Hi Qin,
>>
>> Looking back at Jan's comments, I think his point was not that the
>> leaves should all be mandatory, but that they should either be
>> mandatory, or they should have descriptions that explain the meaning if
>> they are not present.  So I think we are basically in agreement (I said:
>> "Also this use case needs to be mentioned in the description for those
>> leaves.") - but I've copied Jan in case I have mis-interpretted what he
>> said.
>>
>> I disagree that the connection subnet is always requested by the
>> customer - a very common scenario where this is not the case is for
>> residential internet access.  In that case, the addresses used behind
>> the CE are typically from private address space, so the customer can be
>> confident that they won't conflict with whatever the provider has chosen
>> to use (and allocate with DHCP) on the PE/CE link.  Another common case
>> is where it is a provider-managed CE, so the connection addressing
>> applies to the downstream link from the CE to the customer, not to the
>> PE/CE link.  In this case the customer may not have any of their own
>> subnets (i.e. everything is directly connected (at L3) to the CE), so
>> there is no chance of a conflict.
> [KO] As an VPN service provider, our customer really specifies the addresses for provider-customer boundary links in our commercial service. I believe the other service providers also do so.

[DB] That's fine, we are not trying to preclude that case.  However, 
making the leaves mandatory means that it must always be done this way, 
i.e. that there are *never* cases where the provider chooses the 
addressing.  I don't believe that is the case.

> As the abstract says, this model is limited to BGP PE-based VPN service. Your scenario for a residential internet access is out of scope.

[DB] Cloud access, including internet access, is included in the model.

> As shown in a diagram at Section 6.11, the provider-managed CE case considers that customer routers exist under a provider-managed CE. In that case, we can easily imagine address conflict between a CE-customer router link and subnets under a customer router. Also, even if a site is a provider-managed CE site, but if any other site is a customer-managed CE site and allocates addresses by themselves, an address conflict must happen.

[DB] Yes; but there may be a case where there are no customer routers, 
just customer hosts connected directly to the provider-managed CE or 
connected directly to the PE (as described in section 6.11.2).  In this 
case there is no possibility of conflict.


     David



>>>   -----邮件原件-----
>>>   发件人: David Ball [mailto:daviball@cisco.com]
>>>   发送时间: 2017年8月23日 19:48
>>>   收件人: Ogaki, Kenichi; Qin Wu; l3sm@ietf.org
>>>   抄送: 'Stephane Litkowski'; adrian@olddog.co.uk
>>>   主题: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt
>>>
>>>   On 22/08/2017 11:13, Ogaki, Kenichi wrote:
>>>
>>>>   Hi Qin,
>>>>
>>>>>          2. For the connection addresses, the provider's IP address/mask:
>>>>   As for dhcp related provider-addresses and the masks, these are not what SP provides, but the subnet which the customer requests to specify the leased address subnet. Then, these must be configurable.
>>>   So you're saying even when DHCP is used, the customer can request that addresses will be allocated from a specific subnet?  That's not something I've heard of, but ok. :)  These leaves should definitely be optional in that case, as the more normal case is that the customer does not request a specific subnet.  Also this use case needs to be mentioned in the description for those leaves.
>>>
>>>   [Qin]: Early on in the YANG Doctor review from Jan, one suggestion was to make provider-address and customer-address mandatory parameter.
>>>   https://www.ietf.org/mail-archive/web/l3sm/current/msg00677.html
>>>   We think his point is valid and have implemented his comment.
>>>   Talking with L3SM design team members recently, it has been agreed that all these parameters (irrespective of DHCP case or static case )are basically specified/requested by a customer.
>>>   Otherwise, address conflict occurs between provider-allocated subnets (PE-CE links) and customer-allocated subnets (under CE).
>>>   So for consistency, I think we should make all these parameters as mandatory parameters.
>>>
>>>         David
>>>
>>>>   Thanks,
>>>>   Kenichi
>>>>
>>>>   -----Original Message-----
>>>>   From: L3sm [mailto:l3sm-bounces@ietf.org] On Behalf Of Qin Wu
>>>>   Sent: Monday, August 21, 2017 5:39 PM
>>>>   To: David Ball; l3sm@ietf.org
>>>>   Cc: Stephane Litkowski; Kenichi Ogaki; adrian@olddog.co.uk
>>>>   Subject: Re: [L3sm] New Version Notification for
>>>>   draft-wu-l3sm-rfc8049bis-02.txt
>>>>
>>>>>   11. In accordance with the clarified scope, parts of the model that correspond
>>>>>           with information provided by the SP need to be marked with "config false".
>>>>>           I've identified the following, but there might be more.
>>>>>          1. The list of profiles of various types (i.e. l3vpn-service/vpn-profiles)
>>>>>          2. For the connection addresses, the provider's IP address/mask:
>>>>>         • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/provider-address
>>>>>         • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/mask
>>>>>         • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/provider-address
>>>>>         • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/mask
>>>>>         • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/provider-address
>>>>>         • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/mask
>>>>>         • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/provider-address
>>>>>         • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/mask
>>>>>         • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/provider-address
>>>>>         • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/mask
>>>>>         • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/addresses/provider-address
>>>>>         •
>>>>>   l3vpn-service/sites/site/site-network-accesses/site-network-access/ip
>>>>>   -connection/ipv6/addresses/mask
>>>>      
>>>>
>>>>   That sounds reasonable.
>>>>
>>>>   [Qin]: One more comment, we can not put ‘config false’ for
>>>>   l3vpn-service/vpn-profiles, since Config true leafrefs MUST NOT refer
>>>>   to config false data
>>>>
>>>>   This issue was discussed before, see discussion available at:
>>>>
>>>>   https://www.ietf.org/mail-archive/web/l3sm/current/msg00683.html
>>>>
>>>>
>>>>
>>>   --
>>>   David Ball
>>>   <daviball@cisco.com>
>>>
>> -- 
>> David Ball
>> <daviball@cisco.com>
>>
>>

-- 
David Ball
<daviball@cisco.com>


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    <p>Hi Kenichi,<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 25/08/2017 13:59, <a class="moz-txt-link-abbreviated" href="mailto:ke-oogaki@kddi.com">ke-oogaki@kddi.com</a>
      wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:af1a9f9e1bb487f871491bf7e9f806bc@iPhone"><br>
      <blockquote type="cite">
        <pre wrap="">Hi Qin,

Looking back at Jan's comments, I think his point was not that the 
leaves should all be mandatory, but that they should either be 
mandatory, or they should have descriptions that explain the meaning if 
they are not present.  So I think we are basically in agreement (I said: 
"Also this use case needs to be mentioned in the description for those 
leaves.") - but I've copied Jan in case I have mis-interpretted what he 
said.

I disagree that the connection subnet is always requested by the 
customer - a very common scenario where this is not the case is for 
residential internet access.  In that case, the addresses used behind 
the CE are typically from private address space, so the customer can be 
confident that they won't conflict with whatever the provider has chosen 
to use (and allocate with DHCP) on the PE/CE link.  Another common case 
is where it is a provider-managed CE, so the connection addressing 
applies to the downstream link from the CE to the customer, not to the 
PE/CE link.  In this case the customer may not have any of their own 
subnets (i.e. everything is directly connected (at L3) to the CE), so 
there is no chance of a conflict.
</pre>
      </blockquote>
      <pre wrap="">
[KO] As an VPN service provider, our customer really specifies the addresses for provider-customer boundary links in our commercial service. I believe the other service providers also do so.</pre>
    </blockquote>
    <br>
    [DB] That's fine, we are not trying to preclude that case.  However,
    making the leaves mandatory means that it must always be done this
    way, i.e. that there are <b>never</b> cases where the provider
    chooses the addressing.  I don't believe that is the case.<br>
    <br>
    <blockquote type="cite"
      cite="mid:af1a9f9e1bb487f871491bf7e9f806bc@iPhone">
      <pre wrap="">As the abstract says, this model is limited to BGP PE-based VPN service. Your scenario for a residential internet access is out of scope.</pre>
    </blockquote>
    <br>
    [DB] Cloud access, including internet access, is included in the
    model.<br>
    <br>
    <blockquote type="cite"
      cite="mid:af1a9f9e1bb487f871491bf7e9f806bc@iPhone">
      <pre wrap="">As shown in a diagram at Section 6.11, the provider-managed CE case considers that customer routers exist under a provider-managed CE. In that case, we can easily imagine address conflict between a CE-customer router link and subnets under a customer router. Also, even if a site is a provider-managed CE site, but if any other site is a customer-managed CE site and allocates addresses by themselves, an address conflict must happen.</pre>
    </blockquote>
    <br>
    [DB] Yes; but there may be a case where there are no customer
    routers, just customer hosts connected directly to the
    provider-managed CE or connected directly to the PE (as described in
    section 6.11.2).  In this case there is no possibility of conflict.<br>
    <br>
    <br>
        David<br>
    <br>
    <br>
    <br>
    <blockquote type="cite"
      cite="mid:af1a9f9e1bb487f871491bf7e9f806bc@iPhone">
      <blockquote type="cite">
        <blockquote type="cite">
          <pre wrap=""> -----邮件原件-----
 发件人: David Ball [<a class="moz-txt-link-freetext" href="mailto:daviball@cisco.com">mailto:daviball@cisco.com</a>]
 发送时间: 2017年8月23日 19:48
 收件人: Ogaki, Kenichi; Qin Wu; <a class="moz-txt-link-abbreviated" href="mailto:l3sm@ietf.org">l3sm@ietf.org</a>
 抄送: 'Stephane Litkowski'; <a class="moz-txt-link-abbreviated" href="mailto:adrian@olddog.co.uk">adrian@olddog.co.uk</a>
 主题: Re: [L3sm] New Version Notification for draft-wu-l3sm-rfc8049bis-02.txt

 On 22/08/2017 11:13, Ogaki, Kenichi wrote:

</pre>
          <blockquote type="cite">
            <pre wrap=""> Hi Qin,

</pre>
            <blockquote type="cite">
              <pre wrap="">        2. For the connection addresses, the provider's IP address/mask:
</pre>
            </blockquote>
            <pre wrap=""> As for dhcp related provider-addresses and the masks, these are not what SP provides, but the subnet which the customer requests to specify the leased address subnet. Then, these must be configurable.
</pre>
          </blockquote>
          <pre wrap=""> So you're saying even when DHCP is used, the customer can request that addresses will be allocated from a specific subnet?  That's not something I've heard of, but ok. :)  These leaves should definitely be optional in that case, as the more normal case is that the customer does not request a specific subnet.  Also this use case needs to be mentioned in the description for those leaves.

 [Qin]: Early on in the YANG Doctor review from Jan, one suggestion was to make provider-address and customer-address mandatory parameter.
 <a class="moz-txt-link-freetext" href="https://www.ietf.org/mail-archive/web/l3sm/current/msg00677.html">https://www.ietf.org/mail-archive/web/l3sm/current/msg00677.html</a>
 We think his point is valid and have implemented his comment.
 Talking with L3SM design team members recently, it has been agreed that all these parameters (irrespective of DHCP case or static case )are basically specified/requested by a customer.
 Otherwise, address conflict occurs between provider-allocated subnets (PE-CE links) and customer-allocated subnets (under CE).
 So for consistency, I think we should make all these parameters as mandatory parameters.

       David

</pre>
          <blockquote type="cite">
            <pre wrap=""> Thanks,
 Kenichi

 -----Original Message-----
 From: L3sm [<a class="moz-txt-link-freetext" href="mailto:l3sm-bounces@ietf.org">mailto:l3sm-bounces@ietf.org</a>] On Behalf Of Qin Wu
 Sent: Monday, August 21, 2017 5:39 PM
 To: David Ball; <a class="moz-txt-link-abbreviated" href="mailto:l3sm@ietf.org">l3sm@ietf.org</a>
 Cc: Stephane Litkowski; Kenichi Ogaki; <a class="moz-txt-link-abbreviated" href="mailto:adrian@olddog.co.uk">adrian@olddog.co.uk</a>
 Subject: Re: [L3sm] New Version Notification for
 draft-wu-l3sm-rfc8049bis-02.txt

</pre>
            <blockquote type="cite">
              <pre wrap=""> 11. In accordance with the clarified scope, parts of the model that correspond
         with information provided by the SP need to be marked with "config false".
         I've identified the following, but there might be more.
        1. The list of profiles of various types (i.e. l3vpn-service/vpn-profiles)
        2. For the connection addresses, the provider's IP address/mask:
       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/provider-address
       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/provider-dhcp/mask
       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/provider-address
       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/dhcp-relay/mask
       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/provider-address
       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv4/addresses/mask
       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/provider-address
       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/provider-dhcp/mask
       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/provider-address
       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/dhcp-relay/mask
       • l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-connection/ipv6/addresses/provider-address
       •
 l3vpn-service/sites/site/site-network-accesses/site-network-access/ip
 -connection/ipv6/addresses/mask
</pre>
            </blockquote>
            <pre wrap="">    

 That sounds reasonable.

 [Qin]: One more comment, we can not put ‘config false’ for
 l3vpn-service/vpn-profiles, since Config true leafrefs MUST NOT refer
 to config false data

 This issue was discussed before, see discussion available at:

 <a class="moz-txt-link-freetext" href="https://www.ietf.org/mail-archive/web/l3sm/current/msg00683.html">https://www.ietf.org/mail-archive/web/l3sm/current/msg00683.html</a>



</pre>
          </blockquote>
          <pre wrap=""> --
 David Ball
 <a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com">&lt;daviball@cisco.com&gt;</a>

</pre>
        </blockquote>
        <pre wrap="">
-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com">&lt;daviball@cisco.com&gt;</a>


</pre>
      </blockquote>
      <pre wrap="">
</pre>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com">&lt;daviball@cisco.com&gt;</a></pre>
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dgb2312">
</head>
<body bgcolor=3D"#FFFFFF">
<div>It&nbsp;means&nbsp;the&nbsp;requested&nbsp;svc-MTU&nbsp;exceeds&nbsp;M=
TU&nbsp;limit&nbsp;set&nbsp;by&nbsp;the&nbsp;network,&nbsp;the&nbsp;managem=
ent&nbsp;system&nbsp;may&nbsp;trigger&nbsp;some&nbsp;MTU&nbsp;discovery&nbs=
p;mechanism&nbsp;to&nbsp;check&nbsp;this.<br>
<br>
<br>
Sent&nbsp;from&nbsp;HUAWEI&nbsp;AnyOffice</div>
<div name=3D"AnyOffice-Background-Image" style=3D"border-top:1px solid #B5C=
4DF; font-size:14px; line-height:20px; padding:8px">
<div><b>=B7=A2=BC=FE=C8=CB=A3=BA </b>daviball</div>
<div><b>=CA=D5=BC=FE=C8=CB=A3=BA </b>Qin Wu; l3sm; </div>
<div><b>=B3=AD=CB=CD=A3=BA </b>stephane.litkowski; ke-oogaki; adrian; </div=
>
<div><b>=D6=F7=CC=E2=A3=BA </b>Re: [L3sm] New Version Notification for draf=
t-wu-l3sm-rfc8049bis-02.txt</div>
<div><b>=CA=B1=BC=E4=A3=BA </b>2017-08-30 19:09:33</div>
<div><br>
<br>
</div>
</div>
<div>Hi Qin,<br>
<br>
On 28/08/2017 11:13, Qin Wu wrote:<br>
<blockquote type=3D"cite">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#006600">[DB3] I=
 completely agree; my point is to provide some information to the customer =
about how the service might behave if they request a particular value for t=
he MTU.</span><span lang=3D"EN-US"><br>
<br>
</span><span lang=3D"EN-US" style=3D"color:#1F497D">[Qin-3]: I prefer to ke=
ep as it does, but if you insist, we can consider to add something like thi=
s:</span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">=A1=B0if the requested=
 svc-mtu cannot be fulfilled, the management system should return a error m=
essage indicating the fulfillment is not possible.&nbsp; How this SHOULD be=
 communicated by the SP to the customer via a
 mechanism that is out of scope for this document.=A1=B1</span></p>
</blockquote>
<br>
This doesn't really address my point.&nbsp; What does it mean for the reque=
sted svc-mtu to be fulfilled?&nbsp; What behaviour is the customer actually=
 requesting by setting this leaf to a particular value?<br>
<br>
<br>
&nbsp;&nbsp;&nbsp; David<br>
<br>
<pre class=3D"moz-signature" cols=3D"72">--=20
David Ball
<a class=3D"moz-txt-link-rfc2396E" href=3D"mailto:daviball@cisco.com">&lt;d=
aviball@cisco.com&gt;</a></pre>
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To: Qin Wu <bill.wu@huawei.com>, l3sm <l3sm@ietf.org>
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From: David Ball <daviball@cisco.com>
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Right, but that would still be true if the leaf was called 
svc-flagglestops and there was a flagglestop limit set by the network.  :)

My question is what specific behaviour is the customer requesting or 
expecting by setting svc-mtu to a specific value? Assuming the SP 
accepts the request, there is presumably some resulting difference in 
behaviour for packets shorter than the requested value vs packets longer 
than the requested value?  If so, what is it?  For instance, is it that 
packets with length <= svc-mtu will not be discarded due to their 
length, whereas packets with length > svc-mtu might be?

Right now, the draft does not say anything about the meaning of the 
svc-mtu leaf - one can infer from the name of the leaf that it has 
something to do with packet length, but the details are not specified.  
As Jan said: "For a standard to be useful/interoperable, the system 
behavior needs to be predictable. Undefined behavior needs to become 
defined or outlawed.".  There is no behaviour defined for the svc-mtu 
leaf currently - that is the problem I would like to see addressed.


     David


On 30/08/2017 13:32, Qin Wu wrote:
> It means the requested svc-MTU exceeds MTU limit set by the network, the management system may trigger some MTU discovery mechanism to check this.
>
>
> Sent from HUAWEI AnyOffice
> *发件人： *daviball
> *收件人： *Qin Wu; l3sm;
> *抄送： *stephane.litkowski; ke-oogaki; adrian;
> *主题： *Re: [L3sm] New Version Notification for 
> draft-wu-l3sm-rfc8049bis-02.txt
> *时间： *2017-08-30 19:09:33
>
>
> Hi Qin,
>
> On 28/08/2017 11:13, Qin Wu wrote:
>>
>> [DB3] I completely agree; my point is to provide some information to 
>> the customer about how the service might behave if they request a 
>> particular value for the MTU.
>>
>> [Qin-3]: I prefer to keep as it does, but if you insist, we can 
>> consider to add something like this:
>>
>> “if the requested svc-mtu cannot be fulfilled, the management system 
>> should return a error message indicating the fulfillment is not 
>> possible.  How this SHOULD be communicated by the SP to the customer 
>> via a mechanism that is out of scope for this document.”
>>
>
> This doesn't really address my point.  What does it mean for the 
> requested svc-mtu to be fulfilled?  What behaviour is the customer 
> actually requesting by setting this leaf to a particular value?
>
>
>     David
>
> -- 
> David Ball
> <daviball@cisco.com>

-- 
David Ball
<daviball@cisco.com>


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    <p>Right, but that would still be true if the leaf was called
      svc-flagglestops and there was a flagglestop limit set by the
      network.  :)</p>
    <p> My question is what specific behaviour is the customer
      requesting or expecting by setting svc-mtu to a specific value? 
      Assuming the SP accepts the request, there is presumably some
      resulting difference in behaviour for packets shorter than the
      requested value vs packets longer than the requested value?  If
      so, what is it?  For instance, is it that packets with length
      &lt;= svc-mtu will not be discarded due to their length, whereas
      packets with length &gt; svc-mtu might be?<br>
    </p>
    Right now, the draft does not say anything about the meaning of the
    svc-mtu leaf - one can infer from the name of the leaf that it has
    something to do with packet length, but the details are not
    specified.  As Jan said: "For a standard to be useful/interoperable,
    the system behavior needs to be predictable. Undefined behavior
    needs to become defined or outlawed.".  There is no behaviour
    defined for the svc-mtu leaf currently - that is the problem I would
    like to see addressed.<br>
    <br>
    <br>
        David<br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 30/08/2017 13:32, Qin Wu wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:etPan.59a6b04e.327b23c6.23ea@Qin-Wude-iPhone">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <div>It means the requested svc-MTU exceeds MTU limit set by the network, the management system may trigger some MTU discovery mechanism to check this.<br>
        <br>
        <br>
        Sent from HUAWEI AnyOffice</div>
      <div name="AnyOffice-Background-Image" style="border-top:1px solid
        #B5C4DF; font-size:14px; line-height:20px; padding:8px">
        <div><b>发件人： </b>daviball</div>
        <div><b>收件人： </b>Qin Wu; l3sm; </div>
        <div><b>抄送： </b>stephane.litkowski; ke-oogaki; adrian; </div>
        <div><b>主题： </b>Re: [L3sm] New Version Notification for
          draft-wu-l3sm-rfc8049bis-02.txt</div>
        <div><b>时间： </b>2017-08-30 19:09:33</div>
        <div><br>
          <br>
        </div>
      </div>
      <div>Hi Qin,<br>
        <br>
        On 28/08/2017 11:13, Qin Wu wrote:<br>
        <blockquote type="cite">
          <p class="MsoNormal"><span style="color:#006600" lang="EN-US">[DB3]
              I completely agree; my point is to provide some
              information to the customer about how the service might
              behave if they request a particular value for the MTU.</span><span
              lang="EN-US"><br>
              <br>
            </span><span style="color:#1F497D" lang="EN-US">[Qin-3]: I
              prefer to keep as it does, but if you insist, we can
              consider to add something like this:</span></p>
          <p class="MsoNormal"><span style="color:#1F497D">“if the
              requested svc-mtu cannot be fulfilled, the management
              system should return a error message indicating the
              fulfillment is not possible.  How this SHOULD be
              communicated by the SP to the customer via a mechanism
              that is out of scope for this document.”</span></p>
        </blockquote>
        <br>
        This doesn't really address my point.  What does it mean for the
        requested svc-mtu to be fulfilled?  What behaviour is the
        customer actually requesting by setting this leaf to a
        particular value?<br>
        <br>
        <br>
            David<br>
        <br>
        <pre class="moz-signature" cols="72">-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com" moz-do-not-send="true">&lt;daviball@cisco.com&gt;</a></pre>
      </div>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com">&lt;daviball@cisco.com&gt;</a></pre>
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From: Qin Wu <bill.wu@huawei.com>
To: l3sm <l3sm@ietf.org>, daviball <daviball@cisco.com>
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<div>What&nbsp;customer&nbsp;cares&nbsp;about&nbsp;is&nbsp;whether&nbsp;a&n=
bsp;service&nbsp;parameter&nbsp;can&nbsp;be&nbsp;enforced&nbsp;or&nbsp;used=
&nbsp;to&nbsp;create&nbsp;a&nbsp;service&nbsp;successfully,&nbsp;why&nbsp;h=
e&nbsp;has&nbsp;to&nbsp;care&nbsp;about&nbsp;how&nbsp;operator&nbsp;use&nbs=
p;this&nbsp;parameter&nbsp;to&nbsp;control&nbsp;or&nbsp;operate&nbsp;the&nb=
sp;network&nbsp;or&nbsp;whether&nbsp;specific&nbsp;range&nbsp;should&nbsp;o=
r&nbsp;should&nbsp;not&nbsp;be&nbsp;discarded,isn't&nbsp;this&nbsp;up&nbsp;=
to&nbsp;SP&nbsp;to&nbsp;implement&nbsp;this&nbsp;details?!<br>
The&nbsp;earlier&nbsp;proposal&nbsp;is&nbsp;just&nbsp;to&nbsp;specify&nbsp;=
such&nbsp;behavior&nbsp;from&nbsp;customer&nbsp;perspective.<br>
<br>
<br>
Sent&nbsp;from&nbsp;HUAWEI&nbsp;AnyOffice</div>
<div name=3D"AnyOffice-Background-Image" style=3D"border-top:1px solid #B5C=
4DF; font-size:14px; line-height:20px; padding:8px">
<div><b>=B7=A2=BC=FE=C8=CB=A3=BA </b>daviball</div>
<div><b>=CA=D5=BC=FE=C8=CB=A3=BA </b>Qin Wu; l3sm; </div>
<div><b>=B3=AD=CB=CD=A3=BA </b>stephane.litkowski; ke-oogaki; adrian; </div=
>
<div><b>=D6=F7=CC=E2=A3=BA </b>Re: =B4=F0=B8=B4: [L3sm] New Version Notific=
ation for draft-wu-l3sm-rfc8049bis-02.txt</div>
<div><b>=CA=B1=BC=E4=A3=BA </b>2017-08-30 22:28:28</div>
<div><br>
<br>
</div>
</div>
<div>
<p>Right, but that would still be true if the leaf was called svc-flagglest=
ops and there was a flagglestop limit set by the network.&nbsp; :)</p>
<p>My question is what specific behaviour is the customer requesting or exp=
ecting by setting svc-mtu to a specific value?&nbsp; Assuming the SP accept=
s the request, there is presumably some resulting difference in behaviour f=
or packets shorter than the requested
 value vs packets longer than the requested value?&nbsp; If so, what is it?=
&nbsp; For instance, is it that packets with length &lt;=3D svc-mtu will no=
t be discarded due to their length, whereas packets with length &gt; svc-mt=
u might be?<br>
</p>
Right now, the draft does not say anything about the meaning of the svc-mtu=
 leaf - one can infer from the name of the leaf that it has something to do=
 with packet length, but the details are not specified.&nbsp; As Jan said: =
&quot;For a standard to be useful/interoperable,
 the system behavior needs to be predictable. Undefined behavior needs to b=
ecome defined or outlawed.&quot;.&nbsp; There is no behaviour defined for t=
he svc-mtu leaf currently - that is the problem I would like to see address=
ed.<br>
<br>
<br>
&nbsp;&nbsp;&nbsp; David<br>
<br>
<br>
<div class=3D"moz-cite-prefix">On 30/08/2017 13:32, Qin Wu wrote:<br>
</div>
<blockquote type=3D"cite">
<div>It&nbsp;means&nbsp;the&nbsp;requested&nbsp;svc-MTU&nbsp;exceeds&nbsp;M=
TU&nbsp;limit&nbsp;set&nbsp;by&nbsp;the&nbsp;network,&nbsp;the&nbsp;managem=
ent&nbsp;system&nbsp;may&nbsp;trigger&nbsp;some&nbsp;MTU&nbsp;discovery&nbs=
p;mechanism&nbsp;to&nbsp;check&nbsp;this.<br>
<br>
<br>
Sent&nbsp;from&nbsp;HUAWEI&nbsp;AnyOffice</div>
<div name=3D"AnyOffice-Background-Image" style=3D"border-top:1px solid
        #B5C4DF; font-size:14px; line-height:20px; padding:8px">
<div><b>=B7=A2=BC=FE=C8=CB=A3=BA </b>daviball</div>
<div><b>=CA=D5=BC=FE=C8=CB=A3=BA </b>Qin Wu; l3sm; </div>
<div><b>=B3=AD=CB=CD=A3=BA </b>stephane.litkowski; ke-oogaki; adrian; </div=
>
<div><b>=D6=F7=CC=E2=A3=BA </b>Re: [L3sm] New Version Notification for draf=
t-wu-l3sm-rfc8049bis-02.txt</div>
<div><b>=CA=B1=BC=E4=A3=BA </b>2017-08-30 19:09:33</div>
<div><br>
<br>
</div>
</div>
<div>Hi Qin,<br>
<br>
On 28/08/2017 11:13, Qin Wu wrote:<br>
<blockquote type=3D"cite">
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#006600">[DB3] I=
 completely agree; my point is to provide some information to the customer =
about how the service might behave if they request a particular value for t=
he MTU.</span><span lang=3D"EN-US"><br>
<br>
</span><span lang=3D"EN-US" style=3D"color:#1F497D">[Qin-3]: I prefer to ke=
ep as it does, but if you insist, we can consider to add something like thi=
s:</span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">=A1=B0if the requested=
 svc-mtu cannot be fulfilled, the management system should return a error m=
essage indicating the fulfillment is not possible.&nbsp; How this SHOULD be=
 communicated by the SP to the customer via a
 mechanism that is out of scope for this document.=A1=B1</span></p>
</blockquote>
<br>
This doesn't really address my point.&nbsp; What does it mean for the reque=
sted svc-mtu to be fulfilled?&nbsp; What behaviour is the customer actually=
 requesting by setting this leaf to a particular value?<br>
<br>
<br>
&nbsp;&nbsp;&nbsp; David<br>
<br>
<pre class=3D"moz-signature" cols=3D"72">--=20
David Ball
<a class=3D"moz-txt-link-rfc2396E" href=3D"mailto:daviball@cisco.com">&lt;d=
aviball@cisco.com&gt;</a></pre>
</div>
</blockquote>
<br>
<pre class=3D"moz-signature" cols=3D"72">--=20
David Ball
<a class=3D"moz-txt-link-rfc2396E" href=3D"mailto:daviball@cisco.com">&lt;d=
aviball@cisco.com&gt;</a></pre>
</div>
</body>
</html>

--_000_etPan59a6d3b26b8b4567242cQinWudeiPhone_--


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To: Qin Wu <bill.wu@huawei.com>, l3sm <l3sm@ietf.org>
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From: David Ball <daviball@cisco.com>
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On 30/08/2017 16:03, Qin Wu wrote:
> What customer cares about is whether a service parameter can be enforced or used to create a service successfully,

Agreed.  How can this be done if the customer does not know what the 
parameter means?

>  why he has to care about how operator use this parameter to control or operate the network 
> or whether specific range should or should not be discarded,isn't this up to SP to implement this details?!

He doesn't care about whether a specific range should or shouldn't be 
discarded, but he does want to know that the packets he cares about are 
guaranteed not to be discarded.  That is presumably why he would pick a 
particular value for the svc-mtu.  For example, if the customer requests 
svc-mtu to 9000, that presumably means that they want to be sure that 
packets of size up to 9000 will not be discarded.  (Of course, if SP 
can't support that, they will reject the request).  OTOH if the customer 
requests 1400, that presumably means they don't care about packets 
bigger than that (but even so, the SP might still pass packets of length 
9000).

> The earlier proposal is just to specify such behavior from customer perspective.

I didn't see that.  The last proposal just said that if the SP can't 
fulfil the request then they can reject it, which is true for all 
leaves; it didn't say anything about what "svc-mtu" means to the 
customer.  There is nothing in the draft that relates the leaf called 
"svc-mtu" to the length of packets or the behaviour of the service.


     David


>
>
> Sent from HUAWEI AnyOffice
> *发件人： *daviball
> *收件人： *Qin Wu; l3sm;
> *抄送： *stephane.litkowski; ke-oogaki; adrian;
> *主题： *Re: 答复: [L3sm] New Version Notification for 
> draft-wu-l3sm-rfc8049bis-02.txt
> *时间： *2017-08-30 22:28:28
>
>
> Right, but that would still be true if the leaf was called 
> svc-flagglestops and there was a flagglestop limit set by the network.  :)
>
> My question is what specific behaviour is the customer requesting or 
> expecting by setting svc-mtu to a specific value?  Assuming the SP 
> accepts the request, there is presumably some resulting difference in 
> behaviour for packets shorter than the requested value vs packets 
> longer than the requested value?  If so, what is it?  For instance, is 
> it that packets with length <= svc-mtu will not be discarded due to 
> their length, whereas packets with length > svc-mtu might be?
>
> Right now, the draft does not say anything about the meaning of the 
> svc-mtu leaf - one can infer from the name of the leaf that it has 
> something to do with packet length, but the details are not 
> specified.  As Jan said: "For a standard to be useful/interoperable, 
> the system behavior needs to be predictable. Undefined behavior needs 
> to become defined or outlawed.".  There is no behaviour defined for 
> the svc-mtu leaf currently - that is the problem I would like to see 
> addressed.
>
>
>     David
>
>
> On 30/08/2017 13:32, Qin Wu wrote:
>> It means the requested svc-MTU exceeds MTU limit set by the network, the management system may trigger some MTU discovery mechanism to check this.
>>
>>
>> Sent from HUAWEI AnyOffice
>> *发件人： *daviball
>> *收件人： *Qin Wu; l3sm;
>> *抄送： *stephane.litkowski; ke-oogaki; adrian;
>> *主题： *Re: [L3sm] New Version Notification for 
>> draft-wu-l3sm-rfc8049bis-02.txt
>> *时间： *2017-08-30 19:09:33
>>
>>
>> Hi Qin,
>>
>> On 28/08/2017 11:13, Qin Wu wrote:
>>>
>>> [DB3] I completely agree; my point is to provide some information to 
>>> the customer about how the service might behave if they request a 
>>> particular value for the MTU.
>>>
>>> [Qin-3]: I prefer to keep as it does, but if you insist, we can 
>>> consider to add something like this:
>>>
>>> “if the requested svc-mtu cannot be fulfilled, the management system 
>>> should return a error message indicating the fulfillment is not 
>>> possible.  How this SHOULD be communicated by the SP to the customer 
>>> via a mechanism that is out of scope for this document.”
>>>
>>
>> This doesn't really address my point.  What does it mean for the 
>> requested svc-mtu to be fulfilled?  What behaviour is the customer 
>> actually requesting by setting this leaf to a particular value?
>>
>>
>>     David
>>
>> -- 
>> David Ball
>> <daviball@cisco.com>
>
> -- 
> David Ball
> <daviball@cisco.com>
>
>
> _______________________________________________
> L3sm mailing list
> L3sm@ietf.org
> https://www.ietf.org/mailman/listinfo/l3sm

-- 
David Ball
<daviball@cisco.com>


--------------C79ED6FBC23DF092AE9E884D
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<html>
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    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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    On 30/08/2017 16:03, Qin Wu wrote:<br>
    <blockquote type="cite"
      cite="mid:etPan.59a6d3b2.6b8b4567.242c@Qin-Wude-iPhone">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <div>What customer cares about is whether a service parameter can be enforced or used to create a service successfully,</div>
    </blockquote>
    <br>
    Agreed.  How can this be done if the customer does not know what the
    parameter means?<br>
    <br>
    <blockquote type="cite"
      cite="mid:etPan.59a6d3b2.6b8b4567.242c@Qin-Wude-iPhone">
      <div> why he has to care about how operator use this parameter to control or operate the network
or whether specific range should or should not be discarded,isn't this up to SP to implement this details?!<br>
      </div>
    </blockquote>
    <br>
    He doesn't care about whether a specific range should or shouldn't
    be discarded, but he does want to know that the packets he cares
    about are guaranteed not to be discarded.  That is presumably why he
    would pick a particular value for the svc-mtu.  For example, if the
    customer requests svc-mtu to 9000, that presumably means that they
    want to be sure that packets of size up to 9000 will not be
    discarded.  (Of course, if SP can't support that, they will reject
    the request).  OTOH if the customer requests 1400, that presumably
    means they don't care about packets bigger than that (but even so,
    the SP might still pass packets of length 9000).<br>
    <br>
    <blockquote type="cite"
      cite="mid:etPan.59a6d3b2.6b8b4567.242c@Qin-Wude-iPhone">
      <div>
The earlier proposal is just to specify such behavior from customer perspective.<br>
      </div>
    </blockquote>
    <br>
    I didn't see that.  The last proposal just said that if the SP can't
    fulfil the request then they can reject it, which is true for all
    leaves; it didn't say anything about what "svc-mtu" means to the
    customer.  There is nothing in the draft that relates the leaf
    called "svc-mtu" to the length of packets or the behaviour of the
    service.<br>
    <br>
    <br>
        David<br>
    <br>
    <br>
    <blockquote type="cite"
      cite="mid:etPan.59a6d3b2.6b8b4567.242c@Qin-Wude-iPhone">
      <div>
        <br>
        <br>
        Sent from HUAWEI AnyOffice</div>
      <div name="AnyOffice-Background-Image" style="border-top:1px solid
        #B5C4DF; font-size:14px; line-height:20px; padding:8px">
        <div><b>发件人： </b>daviball</div>
        <div><b>收件人： </b>Qin Wu; l3sm; </div>
        <div><b>抄送： </b>stephane.litkowski; ke-oogaki; adrian; </div>
        <div><b>主题： </b>Re: 答复: [L3sm] New Version Notification for
          draft-wu-l3sm-rfc8049bis-02.txt</div>
        <div><b>时间： </b>2017-08-30 22:28:28</div>
        <div><br>
          <br>
        </div>
      </div>
      <div>
        <p>Right, but that would still be true if the leaf was called
          svc-flagglestops and there was a flagglestop limit set by the
          network.  :)</p>
        <p>My question is what specific behaviour is the customer
          requesting or expecting by setting svc-mtu to a specific
          value?  Assuming the SP accepts the request, there is
          presumably some resulting difference in behaviour for packets
          shorter than the requested value vs packets longer than the
          requested value?  If so, what is it?  For instance, is it that
          packets with length &lt;= svc-mtu will not be discarded due to
          their length, whereas packets with length &gt; svc-mtu might
          be?<br>
        </p>
        Right now, the draft does not say anything about the meaning of
        the svc-mtu leaf - one can infer from the name of the leaf that
        it has something to do with packet length, but the details are
        not specified.  As Jan said: "For a standard to be
        useful/interoperable, the system behavior needs to be
        predictable. Undefined behavior needs to become defined or
        outlawed.".  There is no behaviour defined for the svc-mtu leaf
        currently - that is the problem I would like to see addressed.<br>
        <br>
        <br>
            David<br>
        <br>
        <br>
        <div class="moz-cite-prefix">On 30/08/2017 13:32, Qin Wu wrote:<br>
        </div>
        <blockquote type="cite">
          <div>It means the requested svc-MTU exceeds MTU limit set by the network, the management system may trigger some MTU discovery mechanism to check this.<br>
            <br>
            <br>
            Sent from HUAWEI AnyOffice</div>
          <div name="AnyOffice-Background-Image" style="border-top:1px
            solid #B5C4DF; font-size:14px; line-height:20px;
            padding:8px">
            <div><b>发件人： </b>daviball</div>
            <div><b>收件人： </b>Qin Wu; l3sm; </div>
            <div><b>抄送： </b>stephane.litkowski; ke-oogaki; adrian; </div>
            <div><b>主题： </b>Re: [L3sm] New Version Notification for
              draft-wu-l3sm-rfc8049bis-02.txt</div>
            <div><b>时间： </b>2017-08-30 19:09:33</div>
            <div><br>
              <br>
            </div>
          </div>
          <div>Hi Qin,<br>
            <br>
            On 28/08/2017 11:13, Qin Wu wrote:<br>
            <blockquote type="cite">
              <p class="MsoNormal"><span style="color:#006600"
                  lang="EN-US">[DB3] I completely agree; my point is to
                  provide some information to the customer about how the
                  service might behave if they request a particular
                  value for the MTU.</span><span lang="EN-US"><br>
                  <br>
                </span><span style="color:#1F497D" lang="EN-US">[Qin-3]:
                  I prefer to keep as it does, but if you insist, we can
                  consider to add something like this:</span></p>
              <p class="MsoNormal"><span style="color:#1F497D">“if the
                  requested svc-mtu cannot be fulfilled, the management
                  system should return a error message indicating the
                  fulfillment is not possible.  How this SHOULD be
                  communicated by the SP to the customer via a mechanism
                  that is out of scope for this document.”</span></p>
            </blockquote>
            <br>
            This doesn't really address my point.  What does it mean for
            the requested svc-mtu to be fulfilled?  What behaviour is
            the customer actually requesting by setting this leaf to a
            particular value?<br>
            <br>
            <br>
                David<br>
            <br>
            <pre class="moz-signature" cols="72">-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com" moz-do-not-send="true">&lt;daviball@cisco.com&gt;</a></pre>
          </div>
        </blockquote>
        <br>
        <pre class="moz-signature" cols="72">-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com" moz-do-not-send="true">&lt;daviball@cisco.com&gt;</a></pre>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">_______________________________________________
L3sm mailing list
<a class="moz-txt-link-abbreviated" href="mailto:L3sm@ietf.org">L3sm@ietf.org</a>
<a class="moz-txt-link-freetext" href="https://www.ietf.org/mailman/listinfo/l3sm">https://www.ietf.org/mailman/listinfo/l3sm</a>
</pre>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
David Ball
<a class="moz-txt-link-rfc2396E" href="mailto:daviball@cisco.com">&lt;daviball@cisco.com&gt;</a></pre>
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--_000_B8F9A780D330094D99AF023C5877DABA9AAE6ED6nkgeml513mbxchi_--


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From: "Ogaki, Kenichi" <ke-oogaki@kddi.com>
To: "'Qin Wu'" <bill.wu@huawei.com>, "'daviball'" <daviball@cisco.com>
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Subject: Re: [L3sm] =?utf-8?b?562U5aSNOiAgIE5ldyBWZXJzaW9uIE5vdGlmaWNhdGlv?= =?utf-8?q?n_for_draft-wu-l3sm-rfc8049bis-02=2Etxt?=
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Hi David,

See comments inline, please.
Thanks,
Kenichi

-----Original Message-----
From: L3sm [mailto:l3sm-bounces@ietf.org] On Behalf Of Qin Wu
Sent: Wednesday, August 30, 2017 9:40 PM
To: ke-oogaki; daviball
Cc: l3sm; stephane.litkowski; jlindbla@cisco.com; adrian
Subject: [L3sm] =E7=AD=94=E5=A4=8D: New Version Notification for =
draft-wu-l3sm-rfc8049bis-02.txt




Sent from HUAWEI AnyOffice
=E5=8F=91=E4=BB=B6=E4=BA=BA=EF=BC=9A daviball
=E6=94=B6=E4=BB=B6=E4=BA=BA=EF=BC=9A ke-oogaki;
=E6=8A=84=E9=80=81=EF=BC=9A Qin Wu; l3sm; stephane.litkowski; adrian; =
Jan Lindblad (jlindbla);
=E4=B8=BB=E9=A2=98=EF=BC=9A Re: [L3sm] New Version Notification for =
draft-wu-l3sm-rfc8049bis-02.txt
=E6=97=B6=E9=97=B4=EF=BC=9A 2017-08-30 19:19:28



Hi Kenichi,



On 25/08/2017 13:59, ke-oogaki@kddi.com <mailto:ke-oogaki@kddi.com>  =
wrote:



		Hi Qin,
	=09
		Looking back at Jan's comments, I think his point was not that the=20
		leaves should all be mandatory, but that they should either be=20
		mandatory, or they should have descriptions that explain the meaning =
if=20
		they are not present.  So I think we are basically in agreement (I =
said:=20
		"Also this use case needs to be mentioned in the description for those =

		leaves.") - but I've copied Jan in case I have mis-interpretted what =
he=20
		said.
	=09
		I disagree that the connection subnet is always requested by the=20
		customer - a very common scenario where this is not the case is for=20
		residential internet access.  In that case, the addresses used behind=20
		the CE are typically from private address space, so the customer can =
be=20
		confident that they won't conflict with whatever the provider has =
chosen=20
		to use (and allocate with DHCP) on the PE/CE link.  Another common =
case=20
		is where it is a provider-managed CE, so the connection addressing=20
		applies to the downstream link from the CE to the customer, not to the =

		PE/CE link.  In this case the customer may not have any of their own=20
		subnets (i.e. everything is directly connected (at L3) to the CE), so=20
		there is no chance of a conflict.

	[KO] As an VPN service provider, our customer really specifies the =
addresses for provider-customer boundary links in our commercial =
service. I believe the other service providers also do so.


[DB] That's fine, we are not trying to preclude that case.  However, =
making the leaves mandatory means that it must always be done this way, =
i.e. that there are never cases where the provider chooses the =
addressing.  I don't believe that is the case.

[KO2] I agree. We shouldn't preclude any potential/future use cases. =
Then, it's appropriate that these leaves are optional.

	As the abstract says, this model is limited to BGP PE-based VPN =
service. Your scenario for a residential internet access is out of =
scope.


[DB] Cloud access, including internet access, is included in the model.
[Qin] just to clarify, we don't model internet access as a site network =
connectivity, similar to public cloud, it is a external service which =
the current l3vpn service can get access to.=20


	As shown in a diagram at Section 6.11, the provider-managed CE case =
considers that customer routers exist under a provider-managed CE. In =
that case, we can easily imagine address conflict between a CE-customer =
router link and subnets under a customer router. Also, even if a site is =
a provider-managed CE site, but if any other site is a customer-managed =
CE site and allocates addresses by themselves, an address conflict must =
happen.


[DB] Yes; but there may be a case where there are no customer routers, =
just customer hosts connected directly to the provider-managed CE or =
connected directly to the PE (as described in section 6.11.2).  In this =
case there is no possibility of conflict.

[Qin] talking with l3sm design team,we believe In case of two site =
network accesses belonging to the same Von service, address conflict =
between two site network accesses should be avoided.
    David





			 -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
			 =E5=8F=91=E4=BB=B6=E4=BA=BA: David Ball [mailto:daviball@cisco.com]
			 =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2017=E5=B9=B48=E6=9C=8823=E6=97=A5 19:48
			 =E6=94=B6=E4=BB=B6=E4=BA=BA: Ogaki, Kenichi; Qin Wu; l3sm@ietf.org
			 =E6=8A=84=E9=80=81: 'Stephane Litkowski'; adrian@olddog.co.uk
			 =E4=B8=BB=E9=A2=98: Re: [L3sm] New Version Notification for =
draft-wu-l3sm-rfc8049bis-02.txt
		=09
			 On 22/08/2017 11:13, Ogaki, Kenichi wrote:
		=09

				 Hi Qin,
			=09

					        2. For the connection addresses, the provider's IP =
address/mask:

				 As for dhcp related provider-addresses and the masks, these are not =
what SP provides, but the subnet which the customer requests to specify =
the leased address subnet. Then, these must be configurable.

			 So you're saying even when DHCP is used, the customer can request =
that addresses will be allocated from a specific subnet?  That's not =
something I've heard of, but ok. :)  These leaves should definitely be =
optional in that case, as the more normal case is that the customer does =
not request a specific subnet.  Also this use case needs to be mentioned =
in the description for those leaves.
		=09
			 [Qin]: Early on in the YANG Doctor review from Jan, one suggestion =
was to make provider-address and customer-address mandatory parameter.
			 https://www.ietf.org/mail-archive/web/l3sm/current/msg00677.html
			 We think his point is valid and have implemented his comment.
			 Talking with L3SM design team members recently, it has been agreed =
that all these parameters (irrespective of DHCP case or static case )are =
basically specified/requested by a customer.
			 Otherwise, address conflict occurs between provider-allocated =
subnets (PE-CE links) and customer-allocated subnets (under CE).
			 So for consistency, I think we should make all these parameters as =
mandatory parameters.
		=09
			       David
		=09

				 Thanks,
				 Kenichi
			=09
				 -----Original Message-----
				 From: L3sm [mailto:l3sm-bounces@ietf.org] On Behalf Of Qin Wu
				 Sent: Monday, August 21, 2017 5:39 PM
				 To: David Ball; l3sm@ietf.org
				 Cc: Stephane Litkowski; Kenichi Ogaki; adrian@olddog.co.uk
				 Subject: Re: [L3sm] New Version Notification for
				 draft-wu-l3sm-rfc8049bis-02.txt
			=09

					 11. In accordance with the clarified scope, parts of the model =
that correspond
					         with information provided by the SP need to be marked with =
"config false".
					         I've identified the following, but there might be more.
					        1. The list of profiles of various types (i.e. =
l3vpn-service/vpn-profiles)
					        2. For the connection addresses, the provider's IP =
address/mask:
					       =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv4/provider-dhcp/provider-address
					       =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv4/provider-dhcp/mask
					       =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv4/dhcp-relay/provider-address
					       =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv4/dhcp-relay/mask
					       =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv4/addresses/provider-address
					       =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv4/addresses/mask
					       =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv6/provider-dhcp/provider-address
					       =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv6/provider-dhcp/mask
					       =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv6/dhcp-relay/provider-address
					       =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv6/dhcp-relay/mask
					       =E2=80=A2 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip-con=
nection/ipv6/addresses/provider-address
					       =E2=80=A2
					 =
l3vpn-service/sites/site/site-network-accesses/site-network-access/ip
					 -connection/ipv6/addresses/mask

				   =20
			=09
				 That sounds reasonable.
			=09
				 [Qin]: One more comment, we can not put =E2=80=98config =
false=E2=80=99 for
				 l3vpn-service/vpn-profiles, since Config true leafrefs MUST NOT =
refer
				 to config false data
			=09
				 This issue was discussed before, see discussion available at:
			=09
				 https://www.ietf.org/mail-archive/web/l3sm/current/msg00683.html
			=09
			=09
			=09

			 --
			 David Ball
			 <daviball@cisco.com> <mailto:daviball@cisco.com>=20
		=09

		--=20
		David Ball
		<daviball@cisco.com> <mailto:daviball@cisco.com>=20
	=09
	=09

=09


--=20
David Ball
<daviball@cisco.com> <mailto:daviball@cisco.com>=20


