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From: Erik Kline <ek.ietf@gmail.com>
Date: Sun, 6 Feb 2022 22:14:54 -0800
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To: Pascal Thubert <pthubert@cisco.com>
Cc: int-dir@ietf.org, draft-ietf-ipwave-vehicular-networking.all@ietf.org,  its@ietf.org
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Subject: Re: [ipwave] Intdir last call review of draft-ietf-ipwave-vehicular-networking-20
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Pascal, thank you for the detailed review.

Paul, thank you for working through the feedback.

On Fri, Jun 18, 2021 at 12:42 AM Pascal Thubert via Datatracker <
noreply@ietf.org> wrote:

> Reviewer: Pascal Thubert
> Review result: Not Ready
>
> Dear authors
>
> In summary:
>
> I read a number of very good drafts collated in one, from the use cases
> that
> very complete and ready to publish, to the architecture and protocol
> solution
> in section 4 that would require more work for completeness.
>
> There are multiple instances in the use cases where protocols are listed
> coming
> out of the blue, e.g., the references to OMNI that seem artificially spre=
ad
> regardless of the context of the section. OMNI is used throughout, both a=
s
> an
> open ended toolbox, and as a carpet under which all problems can be hidde=
n.
>
> Reading this doc, OMNI shows as an interface to a software mobile router,
> with
> multiple of the device physical interfaces connected to the mobile router=
.
> This
> makes the stack very simple as the complexity moves to the router. But no=
w
> you
> have to implement the router. Presented as that, the OMNI router deserves
> its
> name, it=E2=80=99s indeed very rich; it seems to cover all forms of MANET=
 (many to
> choose from) and NEMO (and all the MIP protocol family across address
> families), all the possible radio interfaces on which the ND problems go
> away
> by magic, and whatever else you want to put in there. Is that the
> intention?
>
> Instead of referring to OMNI for virtually anything, the doc should refer
> to
> MANET for MANET things (like BYOD), NEMO for NEMO things (like MNP),
> draft-nordmark-intarea-ippl for split subnets, and
> draft-thubert-6man-ipv6-over-wireless for P2MP/NBMA link and subnet
> models. And
> then you can say that all those components can be plugged in the OMNI
> router,
> and you can discuss which MANET and which MIP you want, including using
> OMNI=E2=80=99s
> built in mobility.
>
> Note that my objections are not against the OMNI design, it might be the
> perfect thing and I am already aware of use cases that could be served by=
 a
> P2MP interface like OMNI in conjunction with RFC8505 on the P2P
> subinterfaces
> (recycling the high level design we=E2=80=99ve been shipping for IPv4 / f=
rame
> relay for
> the last 30 years). My objection is of the way the draft uses [OMNI] as t=
he
> magic wand that solves all the problems when what you really do is throw
> them
> over the fence. I=E2=80=99d rather you focus on problems and use cases, f=
or which
> there=E2=80=99s excellent text, and indicate what needs to be done withou=
t making
> assumption on how the needful things will be solved.
>
> In agreement with a discussion on the 6MAN list, I=E2=80=99d suggest to s=
plit,
> keep all
> that=E2=80=99s use case and problem description and ship it, remove refer=
ences to
> protocols envisioned in the solution, and start the work on architecture
> of the
> solution and the protocol applicability statements separately. An alterna=
te
> would be to centralize the discussion on protocols to annex, and explain
> that
> protocol A or B could be envisioned in solution space because to over thi=
s
> gap
> or implement that function.
>
> In any fashion, the current text is not ready for publication as
> applicability
> statement, architecture and or/solution, so the related work should be
> removed
> from the main text. But I find it mostly ready for use case and problem
> statement, more below.
>
> Review:
>
> Abstract
>
>    This document discusses the problem statement and use cases of
>    IPv6-based vehicular networking for Intelligent Transportation
>    Systems (ITS).
>
> >>> The document goes beyond that; there was actually a thread at 6MAN
> where
> Bob Hinden said =E2=80=9C This document says it is a problem statement, b=
ut then
> becomes a solution document.   Might be better to cut it down to only the
> problem statement part. =E2=80=9C >>> Would you consider doing this? If n=
ot, why?
> Note:
> you may want to respond on 6MAN as well. >>> >>>I would have thought that
> the
> traditional steps of problem statement and applicability statement of
> existing
> work could be expected from IPWAVE too. >>> Please clarify the steps that
> you
> intend to follow next with this work.
>
> <snip>
>
> 1.  Introduction
>
> >>> Very readable and informative section, many thanks!
>
>    Along with these WAVE standards and C-V2X standards, regardless of a
>    wireless access technology under the IP stack of a vehicle, vehicular
>    networks can operate IP mobility with IPv6 [RFC8200] and Mobile IPv6
>    protocols (e.g., Mobile IPv6 (MIPv6) [RFC6275], Proxy MIPv6 (PMIPv6)
>    [RFC5213], Distributed Mobility Management (DMM) [RFC7333], Locator/
>    ID Separation Protocol (LISP) [RFC6830BIS], and Asymmetric Extended
>    Route Optimization (AERO) [RFC6706BIS]).
>
> >>> NEMO (RFC 3963) is not cited. Any reason why the vehicle would not
> transport a network?
>
> <snip>
>
>    This document describes use cases and a problem statement about
>    IPv6-based vehicular networking for ITS, which is named IPv6 Wireless
>    Access in Vehicular Environments (IPWAVE).  First, it introduces the
>    use cases for using V2V, V2I, and V2X networking in ITS.  Next, for
>    IPv6-based vehicular networks, it makes a gap analysis of current
>    IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mobility Management,
>    and Security & Privacy), and then enumerates requirements for the
>    extensions of those IPv6 protocols, which are tailored to IPv6-based
>    vehicular networking.  Thus, this document is intended to motivate
>    development of key protocols for IPWAVE.
>
> >>>
>
> <snip>
>
> 2.  Terminology
>
> >>>
>
> <snip>
>
>    o  IP-OBU: "Internet Protocol On-Board Unit": An IP-OBU denotes a
>       computer situated in a vehicle (e.g., car, bicycle, autobike,
>       motor cycle, and a similar one) and a device (e.g., smartphone and
>       IoT device).  It has at least one IP interface that runs in IEEE
>       802.11-OCB and has an "OBU" transceiver.  Also, it may have an IP
>       interface that runs in Cellular V2X (C-V2X) [TS-23.285-3GPP]
>       [TR-22.886-3GPP][TS-23.287-3GPP].  See the definition of the term
>       "OBU" in [RFC8691].
>
> >>> Can that be a router connecting multiple computers?
>
> <snip>
>
> 3.  Use Cases
>
> >>> This is another great read and an enlightening section. Maybe mention
> in
> the abstract that the doc also covers use cases?
>
> <snip>
>
>    Although a Layer-2 solution can provide a support for multihop
>    communications in vehicular networks, the scalability issue related
>    to multihop forwarding still remains when vehicles need to
>    disseminate or forward packets toward multihop-away destinations.  In
>    addition, the IPv6-based approach for V2V as a network layer protocol
>    can accommodate multiple radio technologies as MAC protocols, such as
>    5G V2X and DSRC.  Therefore, the existing IPv6 protocol can be
>    augmented through the addition of an Overlay Multilink Network (OMNI)
>    Interface [OMNI] and/or protocol changes in order to support both
>    wireless single-hop/multihop V2V communications and multiple radio
>    technologies in vehicular networks.  In such a way, vehicles can
>    communicate with each other by V2V communications to share either an
>    emergency situation or road hazard in a highway having multiple kinds
>    of radio technologies, such as 5G V2X and DSRC.
>
> >>> This text appears in the middle of high level use case, with a crude
> list
> of protocols; this is not a place for it
>
> >>> On a 6MAN Thread, Brian Carpenter said that the above:
> =E2=80=9C
> is of concern regardless of the mention of OMNI. Does it mean "can be" or
> "needs to be"? This paragraph seems like a very short summary of a big
> problem
> area. At the end of page 13 there is some related discussion, which
> mentions
> RPL as part of the solution (good choice, IMHO) but again seems to depend
> on
> OMNI. I don't think the fix of simply removing references to OMNI works,
> because it would leave a gap. In an informational document, that is not a
> formal problem but as far as this draft describes architecture, I don't
> think
> that big a gap is reasonable. "OMNI" is mentioned more than 20 times in t=
he
> document. There are also several references to AERO, which is strongly
> associated with OMNI. =E2=80=9C >>> I agree with Brian. Here the document=
 seems to
> be
> mixing solution with problem and putting the cart before the horse. My
> recommendation is to stick to what needs to be done that IPv6 does not do
> yet
> -the reqs and gaps-; but the doc should not step in the how things will b=
e
> done
> unless the group already decided to do it. The logical next steps to a PS
> are
> an applicability statement of existing work, and if the gaps cannot be
> filled,
> there may be one or more WG chartered to fill those gaps.
>
> >>> I=E2=80=99d still be happy to see an annex with leads on where the so=
lution
> might
> come from like RFC 8691 does.
>
> <snip>
>
>    The existing IPv6 protocol must be augmented through the addition of
>    an OMNI interface and/or protocol changes in order to support
>    wireless multihop V2I communications in a highway where RSUs are
>    sparsely deployed, so a vehicle can reach the wireless coverage of an
>    RSU through the multihop data forwarding of intermediate vehicles.
>    Thus, IPv6 needs to be extended for multihop V2I communications.
>
> >>> Note that I have no clue on how well OMNI applies in that space, mayb=
e
> it
> does very well; but here it comes out of the blue with no justification.
> If you
> mention OMNI you need to detail what it is and which of the V2V  problems
> you
> expect it to solve. But then, that=E2=80=99s beyond the scope of a PS.
>
> <snip>
>
>    The existing IPv6 protocol must be augmented through the addition of
>    an OMNI interface and/or protocol changes in order to support
>    wireless multihop V2X (or V2I2X) communications in an urban road
>    network where RSUs are deployed at intersections, so a vehicle (or a
>    pedestrian's smartphone) can reach the wireless coverage of an RSU
>    through the multihop data forwarding of intermediate vehicles (or
>    pedestrians' smartphones).  Thus, IPv6 needs to be extended for
>    multihop V2X (or V2I2X) communications.
>
> >>> Please be more specific on what the missing functions are and whether
> they
> are missing from the stack development standpoint or if there=E2=80=99s w=
ork needed
> from the IETF. 1)      If something is really missing in our specs, the
> text to
> prove from the use case above is missing 2)      how OMNI serves the use
> case
> could be elaborated in an applicability statement of OMNI for V2xyz, but
> it is
> a bit blunt to present it as panacea when the problems to be solved are n=
ot
> listed. 3)      If you look at it, OMNI seems like a software mobile rout=
er
> within a bump in the stack. Can that become too big?
>
> >>> my view is that the text above and the similar occasions should be
> replaced
> by something like :
>
>    The existing IPv6 protocol must be augmented to provide the following
>    functions: 1) =E2=80=A6
>
> >>> and / or something like:
>
>    In addition to the IPv6 node requirements [RFC 8504], the IPv6 protoco=
l
>    stack for use in a vehicle must support 1) RFC blah, 2) =E2=80=A6
>
> <snip>
>
>    To support applications of these V2X use cases, the functions of IPv6
>    such as VND, VMM, and VSP are prerequisites for IPv6-based packet
>    exchange, transport-layer session continuity, and secure, safe
>    communication between a vehicle and a pedestrian either directly or
>    indirectly via an IP-RSU.
>
> >>> =E2=80=9Cthe functions of IPv6 such as VND, VMM, and VSP=E2=80=9D doe=
s not parse.
> There=E2=80=99s
> no IPv6 reference that provides those functions. If the intention is to s=
ay
> that there=E2=80=99s stuff to add to IPv6 to support, like, say,  VND, th=
en this
> document fails to define how an IPv6 VND should behave, though it=E2=80=
=99s
> precisely
> what I=E2=80=99d expect from a problem statement.
>
> <snip>
>
> 4.  Vehicular Networks
>
> >>> What is the purpose of section 4 as a whole, problem statement or
> applicability statement of the listed protocols? In the former case what=
=E2=80=99s
> the
> problem? In the latter case it is incomplete and needs to be exported to =
an
> applicability statement doc with all the possible technologies evaluated.
>
>    This section describes an example vehicular network architecture
>    supporting V2V, V2I, and V2X communications in vehicular networks.
>
> >>> I read this as presenting a context to explain what the problems are
> instead of presenting the IPVAWE =E2=80=9Carchitecture=E2=80=9D. Maybe us=
ing the term
> =E2=80=9CArchitecture=E2=80=9D here is misleading and led to Bob=E2=80=99=
s comment.
>
> <snip>
>
> 4.1.  Vehicular Network Architecture
>
>    Figure 1 shows an example vehicular network architecture for V2I and
>    V2V in a road network [OMNI].
>
> a.      Is using OMNI a decision that the WG made for the future work ?
> what
> does it do and what does it not do? b.      Is there work left to be done=
?
> Who
> will do that work? Or is it the expectation that OMNI has it all defined
> already?
>
> <snip>
>
>    An existing network architecture (e.g., an IP-based aeronautical
>    network architecture [OMNI][UAM-ITS], a network architecture of
>    PMIPv6 [RFC5213], and a low-power and lossy network architecture
>    [RFC6550]) can be extended to a vehicular network architecture for
>    multihop V2V, V2I, and V2X, as shown in Figure 1.  In a highway
>    scenario, a vehicle may not access an RSU directly because of the
>    distance of the DSRC coverage (up to 1 km).  For example, the OMNI
>    interface and/or RPL (IPv6 Routing Protocol for Low-Power and Lossy
>    Networks) [RFC6550] can be extended to support a multihop V2I since a
>    vehicle can take advantage of other vehicles as relay nodes to reach
>    the RSU.  Also, RPL can be extended to support both multihop V2V and
>    V2X in the similar way.
>
> >>> all this could fit well in annex; anyway you need to explain what you
> expect the protocols to do and which extension is needed. In the case of
> RPL at
> least you indicate that it would do routing, but not why you cannot use i=
t
> of
> the shelf; for OMNI, what you expect is less clear, though there=E2=80=99=
s text
> elsewhere about the many radio interfaces that could be used for the
> purpose,
> and the text in the UAM below that is enlightening.
>
> <snip>
>
>                                   To support not only the mobility
>    management of the UAM end systems, but also the multihop and
>    multilink communications of the UAM interfaces, the UAM end systems
>    can employ an Overlay Multilink Network (OMNI) interface [OMNI] as a
>    virtual Non-Broadcast Multiple Access (NBMA) connection to a serving
>    ground domain infrastructure.
>
> >>> Again, what is the expectation for OMNI? As an overlay it requires an
> underlay; when connecting to a MANET it needs support for that MANET. The
> text
> above seems to imply that is solves everything in V2xyz like magic;
> reminds me
> of the IPv6 multicast abstraction that was supposed to solve the broadcas=
t
> problem and ended up worsening it.
>
> <snip>
>
>                             This infrastructure can be configured
>    over the underlying data links.  The OMNI interface and its link
>    model provide a means of multilink, multihop and mobility
>    coordination to the legacy IPv6 ND messaging [RFC4861] according to
>    the NBMA principle.  Thus, the OMNI link model can support efficient
>    UAM internetworking services without additional mobility messaging,
>    and without any modification to the IPv6 ND messaging services or
>    link model.
>
> >>> Again, what is the expectation for OMNI? As an overlay it requires an
> underlay; the text above seems to imply that is solves everything in V2xy=
z
> like
> magic; that would be a stretch, that reminds me of IPv6 multicast that wa=
s
> supposed to solve the broadcast problem and ended up worsening it.
>
> <snip>
>
>    Multiple vehicles under the coverage of an RSU share a prefix just as
>    mobile nodes share a prefix of a Wi-Fi access point in a wireless
>    LAN.  This is a natural characteristic in infrastructure-based
>    wireless networks.  For example, in Figure 1, two vehicles (i.e.,
>    Vehicle2, and Vehicle5) can use Prefix 1 to configure their IPv6
>    global addresses for V2I communication.  Alternatively, mobile nodes
>    can employ an OMNI interface and use their own IPv6 Unique Local
>    Addresses (ULAs) [RFC4193] over the wireless network without
>    requiring the messaging of IPv6 Stateless Address Autoconfiguration
>   (SLAAC) [RFC4862], which uses an on-link prefix provided by the
>    (visited) wireless LAN; this technique is known as "Bring-Your-Own-
>    Addresses".
>
> >>>  Is OMNI the only way to "Bring-Your-Own-Addresses=E2=80=9D? Else the=
 text
> could be
> more generic, at least use e.g., like the ref to AERO later. >>> What are
> the
> implications / limitations of doing that =E2=80=93 like they can do line =
of sight
> V2V
> but not reach the internet, or the need of  a local MANET / RPL that will
> accept to route those addresses, or the security / address ownership
> validation
> issues ?
>
> <snip>
>
>    A single subnet prefix announced by an RSU can span multiple vehicles
>    in VANET.  For example, in Figure 1, for Prefix 1, three vehicles
>    (i.e., Vehicle1, Vehicle2, and Vehicle5) can construct a connected
>    VANET.  Also, for Prefix 2, two vehicles (i.e., Vehicle3 and
>    Vehicle6) can construct another connected VANET, and for Prefix 3,
>    two vehicles (i.e., Vehicle4 and Vehicle7) can construct another
>    connected VANET.  Alternatively, each vehicle could employ an OMNI
>    interface with their own ULAs such that no topologically-oriented
>    subnet prefixes need be announced by the RSU.
>
> >>>  same as above. This seems to restate the same thing, derive an addre=
ss
> from a topologically correct prefix or use your own with limitations to b=
e
> described.
>
> <snip>
>
>    For IPv6 packets transported over IEEE 802.11-OCB, [RFC8691]
>    specifies several details, including Maximum Transmission Unit (MTU),
>    frame format, link-local address, address mapping for unicast and
>    multicast, stateless autoconfiguration, and subnet structure.  An
>    Ethernet Adaptation (EA) layer is in charge of transforming some
>    parameters between the IEEE 802.11 MAC layer and the IPv6 network
>    layer, which is located between the IEEE 802.11-OCB's logical link
>    control layer and the IPv6 network layer.  This IPv6 over 802.11-OCB
>    can be used for both V2V and V2I in IPv6-based vehicular networks.
>
> >>>  solution space.
>
> <snip>
>
>    An IPv6 mobility solution is needed for the guarantee of
>    communication continuity in vehicular networks so that a vehicle's
>    TCP session can be continued, or UDP packets can be delivered to a
>    vehicle as a destination without loss while it moves from an IP-RSU's
>    wireless coverage to another IP-RSU's wireless coverage.  In
>    Figure 1, assuming that Vehicle2 has a TCP session (or a UDP session)
>    with a corresponding node in the vehicular cloud, Vehicle2 can move
>    from IP-RSU1's wireless coverage to IP-RSU2's wireless coverage.  In
>    this case, a handover for Vehicle2 needs to be performed by either a
>    host-based mobility management scheme (e.g., MIPv6 [RFC6275]) or a
>    network-based mobility management scheme (e.g., PMIPv6 [RFC5213] and
>    AERO [RFC6706BIS]).
>
>    In the host-based mobility scheme (e.g., MIPv6), an IP-RSU plays a
>    role of a home agent.  On the other hand, in the network-based
>    mobility scheme (e.g., PMIPv6, an MA plays a role of a mobility
>    management controller such as a Local Mobility Anchor (LMA) in
>    PMIPv6, which also serves vehicles as a home agent, and an IP-RSU
>    plays a role of an access router such as a Mobile Access Gateway
>    (MAG) in PMIPv6 [RFC5213].  The host-based mobility scheme needs
>    client functionality in IPv6 stack of a vehicle as a mobile node for
>    mobility signaling message exchange between the vehicle and home
>    agent.  On the other hand, the network-based mobility scheme does not
>    need such a client functionality for a vehicle because the network
>    infrastructure node (e.g., MAG in PMIPv6) as a proxy mobility agent
>    handles the mobility signaling message exchange with the home agent
>    (e.g., LMA in PMIPv6) for the sake of the vehicle.
>
>    There are a scalability issue and a route optimization issue in the
>    network-based mobility scheme (e.g., PMIPv6) when an MA covers a
>    large vehicular network governing many IP-RSUs.  In this case, a
>    distributed mobility scheme (e.g., DMM [RFC7429]) can mitigate the
>    scalability issue by distributing multiple MAs in the vehicular
>    network such that they are positioned closer to vehicles for route
>    optimization and bottleneck mitigation in a central MA in the
>    network-based mobility scheme.  All these mobility approaches (i.e.,
>    a host-based mobility scheme, network-based mobility scheme, and
>    distributed mobility scheme) and a hybrid approach of a combination
>    of them need to provide an efficient mobility service to vehicles
>    moving fast and moving along with the relatively predictable
>    trajectories along the roadways.
>
>    In vehicular networks, the control plane can be separated from the
>    data plane for efficient mobility management and data forwarding by
>    using the concept of Software-Defined Networking (SDN)
>    [RFC7149][DMM-FPC].  Note that Forwarding Policy Configuration (FPC)
>    in [DMM-FPC], which is a flexible mobility management system, can
>    manage the separation of data-plane and control-plane in DMM.  In
>    SDN, the control plane and data plane are separated for the efficient
>    management of forwarding elements (e.g., switches and routers) where
>    an SDN controller configures the forwarding elements in a centralized
>    way and they perform packet forwarding according to their forwarding
>    tables that are configured by the SDN controller.  An MA as an SDN
>    controller needs to efficiently configure and monitor its IP-RSUs and
>    vehicles for mobility management, location management, and security
>    services.
>
>    The mobility information of a GPS receiver mounted in its vehicle
>    (e.g., position, speed, and direction) can be used to accommodate
>    mobility-aware proactive handover schemes, which can perform the
>    handover of a vehicle according to its mobility and the wireless
>    signal strength of a vehicle and an IP-RSU in a proactive way.
>
>    Vehicles can use the TCC as their Home Network having a home agent
>    for mobility management as in MIPv6 [RFC6275] and PMIPv6 [RFC5213],
>    so the TCC (or an MA inside the TCC) maintains the mobility
>    information of vehicles for location management.  IP tunneling over
>    the wireless link should be avoided for performance efficiency.
>    Also, in vehicular networks, asymmetric links sometimes exist and
>    must be considered for wireless communications such as V2V and V2I.
>
> >>>  This is all very informative text but does not state a problem. Is
> there a
> problem is left to be solved or are we assessing the applicability of
> protocols? Could it for instance, forward point to issues discussed in
> section
> 5?
>
> <snip>
>
>    As shown in Figure 3, as internal networks, a vehicle's moving
>    network and an EN's fixed network are self-contained networks having
>    multiple subnets and having an edge router (e.g., IP-OBU and IP-RSU)
>    for the communication with another vehicle or another EN.  The
>    internetworking between two internal networks via V2I communication
>    requires the exchange of the network parameters and the network
>    prefixes of the internal networks.  For the efficiency, the network
>    prefixes of the internal networks (as a moving network) in a vehicle
>    need to be delegated and configured automatically.  Note that a
>    moving network's network prefix can be called a Mobile Network Prefix
>    (MNP) [OMNI].
>
> >>> Then again you=E2=80=99re overselling OMNI. MNP is originally defined=
 here
> https://datatracker.ietf.org/doc/html/rfc3963#section-2 and that=E2=80=99=
s a
> reference
> you can use normatively.
>
> <snip>
>
>    As shown in Figure 3, the addresses used for IPv6 transmissions over
>    the wireless link interfaces for IP-OBU and IP-RSU can be either
>    global IPv6 addresses, or IPv6 ULAs as long as IPv6 packets can be
>    routed within vehicular networks [OMNI].
>
> >>> Then again you=E2=80=99re overselling OMNI. There needs to  be a rout=
ing
> protocol
> like a MANET that will accept to carry the
>  MNPs, and that must be implemented by the infra and both cars. The OMNI
> spec
>  is clear on that. This is why at first glance I see OMNI as a full mobil=
e
>  router in a bump in the stack. Now what is the problem behind this? No
> such
>  protocol at IETF? Too many to choose from? No deployment?
> <snip>
>
> When global IPv6 addresses
>    are used, wireless interface configuration and control overhead for
>    Duplicate Address Detection (DAD) [RFC4862] and Multicast Listener
>    Discovery (MLD) [RFC2710][RFC3810] should be minimized to support V2I
>    and V2X communications for vehicles moving fast along roadways; when
>    ULAs and the OMNI interface are used, no DAD nor MLD messaging is
>    needed.
>
> >>> Then again you=E2=80=99re overselling OMNI. Isn=E2=80=99t it the no d=
ad needed a
> property
> of injecting a BYOA in the fabric for an GUA MIP Home Address which is
> known to
> be unique at home? >>> OTOH, autoconf=E2=80=99ing a random ULA =E2=80=9CF=
D=E2=80=A6=E2=80=9Dprefix has
> lesser
> DAD properties than autoconf=E2=80=99ing a random 64bit IID in a classica=
l subnet.
> So
> who says DAD isn=E2=80=99t required for OMNI ULA? >>> note that IMHO DAD =
on
> wireless is
> a lot more harm than good, and I agree that with a good pseudo random
> generator
> the ULA has no chance to collision in the real world, as OMNI claims. It=
=E2=80=99s
> just
> that your argument here plays the other way, because there are less rando=
m
> bits
> (56)  in the ULA prefix than in the IID (62), and if one starts using mor=
e
> prefix bits to be non-random, there will be a time when DAD on prefix is
> needed.
>
> <snip>
>
>    Let us consider the upload/download time of a vehicle when it passes
>    through the wireless communication coverage of an IP-RSU.  For a
>    given typical setting where 1km is the maximum DSRC communication
>    range [DSRC] and 100km/h is the speed limit in highway, the dwelling
>    time can be calculated to be 72 seconds by dividing the diameter of
>    the 2km (i.e., two times of DSRC communication range where an IP-RSU
>    is located in the center of the circle of wireless communication) by
>    the speed limit of 100km/h (i.e., about 28m/s).  For the 72 seconds,
>    a vehicle passing through the coverage of an IP-RSU can upload and
>    download data packets to/from the IP-RSU.
>
> <snip>
>
> 4.3.  V2V-based Internetworking
>
> >>> In this section it looks like the cars are in a stable line of sight
> relationship. Which is probably fine for a platoon, but when you drive
> along
> with friends in different cars, you realize that the line of sight
> assumption
> does not stand over time. Soon enough, other cars meddle in, and possibly
> one
> of the cars drives faster and too far ahead so you need the infra to rela=
y,
> possibly over multiple infra hops.
>
> >>> so in this section, I=E2=80=99d expect to see a Vehicle communicating=
 with
> another
> one and using either line of sight or V2V relaying but also using relay
> via V2I
> (multihop I2I not just hub and spoke V2I2V ), alternatively to together f=
or
> redundancy. Is that part of the problem?
>
> >>> reading deeper section 5 I found excellent text on routing via V and
> via I.
> This tells that section 4 does not play a good role at justifying section
> 5.
> Maybe keep section 4 for another doc?
>
> >>> What kind or reliability is required in a V2V use case? Do you think
> ND can
> handle it? Or MANET? What would be the assumption on L2 (roaming time,
> unicast
> vs P2MP) and on L3 (reliability ala DetNet/RAW). Should we have some L3
> redundancy?
>
> <snip>
>
> 5.  Problem Statement
>
> <snip>
>
>    In order to specify protocols using the architecture mentioned in
>    Section 4.1, IPv6 core protocols have to be adapted to overcome
>    certain challenging aspects of vehicular networking.  Since the
>    vehicles are likely to be moving at great speed, protocol exchanges
>    need to be completed in a time relatively short compared to the
>    lifetime of a link between a vehicle and an IP-RSU, or between two
>    vehicles.
>
> >>> Any order of magnitude?
> >>> Can you indicate whether this already rules out certain procedures,
> e.g.
> DAD ?
>
>    The lifetime of a session varies depending on the session's type such
>    as a web surfing, voice call over IP, and DNS query.  Regardless of a
>    session's type, to guide all the IPv6 packets to their destination
>    host, IP mobility should be supported for the session.
>
> >>> this seems to be for unicast when you know who to talk to. Is there a
> need
> some multicast groups like anybody around interested in topic blah like I
> could
> be multicasting the speed of vehicles coming the other way that I crossed
> recently, for use of vehicles that I=E2=80=99m crossing now, so they can =
see a
> slowdown
> on advance
>
>    Thus, the time constraint of a wireless link has a major impact on
>    IPv6 Neighbor Discovery (ND).  Mobility Management (MM) is also
>    vulnerable to disconnections that occur before the completion of
>    identity verification and tunnel management.  This is especially true
>    given the unreliable nature of wireless communication.  This section
>    presents key topics such as neighbor discovery and mobility
>    management.
>
> >>> Only ND? What about the MANET?
> >>> how fast should ND be to be suitable?
> >>> is there also a bandwidth check? You can make things much faster if y=
ou
> dedicate a lot of spectrum to it. But that can also be a waste.
>
> 5.1.  Neighbor Discovery
>
> <snip>
>
>    The requirements for IPv6 ND for vehicular networks are efficient DAD
>    and NUD operations.
>
> >>> Not lookup? Is it the intention to use IP unicast over MAC broadcast,
> which
> is a good idea in my book?
>
>  <snip>
>
>       This merging and partitioning should be considered for the
>    IPv6 ND such as IPv6 Stateless Address Autoconfiguration (SLAAC)
>    [RFC4862].
>
> >>> Not lookup? Is it the intention to use IP unicast over MAC broadcast,
> which
> is a good idea in my book?
>
>  <snip>
>
>    Also, the partitioning of a VANET may make vehicles with the same
>    prefix be physically unreachable.  Also, SLAAC needs to prevent IPv6
>    address duplication due to the merging of VANETs.  According to the
>    merging and partitioning, a destination vehicle (as an IPv6 host)
>    needs to be distinguished as either an on-link host or an off-link
>    host even though the source vehicle uses the same prefix as the
>    destination vehicle.
>
> >>> should reference to draft-nordmark-intarea-ippl
>
>    To efficiently prevent IPv6 address duplication due to the VANET
>    partitioning and merging from happening in vehicular networks, the
>    vehicular networks need to support a vehicular-network-wide DAD by
>    defining a scope that is compatible with the legacy DAD.  In this
>    case, two vehicles can communicate with each other when there exists
>    a communication path over VANET or a combination of VANETs and IP-
>    RSUs, as shown in Figure 1.  By using the vehicular-network-wide DAD,
>    vehicles can assure that their IPv6 addresses are unique in the
>    vehicular network whenever they are connected to the vehicular
>    infrastructure or become disconnected from it in the form of VANET.
>
> >>> Excellent
>
>    ND time-related parameters such as router lifetime and Neighbor
>    Advertisement (NA) interval need to be adjusted for vehicle speed and
>    vehicle density.  For example, the NA interval needs to be
>    dynamically adjusted according to a vehicle's speed so that the
>    vehicle can maintain its neighboring vehicles in a stable way,
>    considering the collision probability with the NA messages sent by
>    other vehicles.
>
> >>> Is that a problem or just an operational setting that needs to be
> found?
> >>> Do we need to reconsider the concepts of those timers?
>
> <snip>
>
>    Thus, in IPv6-based vehicular networking, IPv6 ND should have minimum
>    changes for the interoperability with the legacy IPv6 ND used in the
>    Internet, including the DAD and NUD operations.
>
> >>> I do not find the logical link with the text before, why is this a
> =E2=80=9Cthus=E2=80=9D?
> >>> why should the ND inside the VANET be constrained to be interoperable=
?
> This
> may place constraints on the solution.
>
> 5.1.1.  Link Model
>
>    A prefix model for a vehicular network needs to facilitate the
>
> >>> Do you mean a =E2=80=9Csubnet model=E2=80=9D as opposed to =E2=80=9Cp=
refix model=E2=80=9D.
> >>> it would make this piece and the next should refer to
> draft-thubert-6man-ipv6-over-wireless for IPv6 over P2MP /NBMA, for both
> link
> and subnet issues. The general ideas are the same, but the gory details
> here
> are slightly incorrect, like this notion of prefix model than comes out o=
f
> the
> blue. The model is really the subnet model for the subnet associated to
> P2MP.
>
>    communication between two vehicles with the same prefix regardless of
>    the vehicular network topology as long as there exist bidirectional
>    E2E paths between them in the vehicular network including VANETs and
>    IP-RSUs.  This prefix model allows vehicles with the same prefix to
>    communicate with each other via a combination of multihop V2V and
>    multihop V2I with VANETs and IP-RSUs.  Note that the OMNI interface
>    supports an NBMA link model where multihop V2V and V2I communications
>    use each mobile node's ULAs without need for any DAD or MLD
>    messaging.
>
> >>> again overselling OMNI.
> >>> I kinda agree about the OMNI interface model, nothing against that.
> But you
> must see that there needs a lot more than what the OMNI interface to get
> packets across V and I hops to the destination. Like routing ala MANET,
> redundancy handling ala DetNet because it will be very lossy, path
> management
> ala RAW to optimize delivery vs. spectrum=E2=80=A6 And OMNI ignores ND so=
 it does
> not
> solve the ND problems above.
>
>    IPv6 protocols work under certain assumptions that do not necessarily
>    hold for vehicular wireless access link types other than OMNI/NBMA
>    [VIP-WAVE][RFC5889]; the rest of this section discusses implications
>    for those link types that do not apply when the OMNI/NBMA link model
>
> >>> again overselling OMNI.
> >>> The keyword here is P2MP / NBMA, and OMNI is one interface that accep=
ts
> that. There are others. IBM=E2=80=99s IPv4 over Frame relay was already P=
2MP /
> NBMA,
> using routing to complete the partial mesh in P2MP. The text seems to imp=
ly
> that OMNI is the only way to do that and that=E2=80=99s wrong. Also OMNI =
is loaded
> with
> other stuff than a plain P2MP capable interface. And ND over P2MP is not
> done
> by OMNI, OMNI only makes classical ND worse and only works in a full mesh=
.
> OTOH
> RFC 8505, which is designed to do ND for P2MP /NBMA would indeed work ver=
y
> well
> within an OMNI interface and solve those problems. >>> My point is that y=
ou
> need to tell the full story or refrain from entering solution space in
> this doc
>
> <snip>
>
>    There is a relationship between a link and a prefix, besides the
>    different scopes that are expected from the link-local and global
>    types of IPv6 addresses.  In an IPv6 link, it is assumed that all
>    interfaces which are configured with the same subnet prefix and with
>    on-link bit set can communicate with each other on an IPv6 link.
>
> >>> not assumed; that=E2=80=99s what the onlink but set tells. The conclu=
sion
> should be
> that the VANET cannot set the O bit.
>
>    However, the vehicular link model needs to define the relationship
>    between a link and a prefix, considering the dynamics of wireless
>    links and the characteristics of VANET.
>
> <snip>
>
>    From the previous observation, a vehicular link model should consider
>    the frequent partitioning and merging of VANETs due to vehicle
>    mobility.  Therefore, the vehicular link model needs to use an on-
>    link prefix and off-link prefix according to the network topology of
>    vehicles such as a one-hop reachable network and a multihop reachable
>
> >>> No, the once a node saw a O bit set that sticks even if it sees other
> advertisements of the PIO with the O bit not set. >>> This is a global an=
d
> intrinsic property of the prefix (and an attack vector that could be
> mentioned
> in the sec section). >>> the VANET prefix must never come with the O bit
> set.
>
> <snip>
>
>    network (or partitioned networks).  If the vehicles with the same
>    prefix are reachable from each other in one hop, the prefix should be
>    on-link.
>
> >>>> No, see above; but the router may redirect though it is really risky
> unless this is a stable situation like a parking place.
>
>    Thus, in IPv6-based vehicular networking, the vehicular link model
>    should have minimum changes for interoperability with standard IPv6
>    links in an efficient fashion to support IPv6 DAD, MLD and NUD
>    operations.  When the OMNI NBMA link model is used, there are no link
>    model changes nor DAD/MLD messaging required.
>
> >>>> again overselling OMNI.
> >>>> You need a good P2MP subnet model with routing support when the mesh
> is
> partial. My company alone has been shipping million of nodes that build
> subnets
> of thousands, and that was done using IETF standards.
>
> <snip>
>
>    For vehicular networks with high mobility and density, the DAD needs
>    to be performed efficiently with minimum overhead so that the
>    vehicles can exchange a driving safety message (e.g., collision
>    avoidance and accident notification) with each other with a short
>    interval (e.g., 0.5 second) by a technical report from NHTSA
>    (National Highway Traffic Safety Administration) [NHTSA-ACAS-Report].
>    Such a driving safety message may include a vehicle's mobility
>    information (i.e., position, speed, direction, and acceleration/
>    deceleration).  The exchange interval of this message is 0.5 second,
>    which is required to allow a driver to avoid a rear-end crash from
>    another vehicle.
>
> >>> IPv6 over broadcast MAC (used to be called internet 0, 10+ years ago)
> solves that MAC issue since there is no MAC.
>
> 5.1.3.  Routing
>
>    For multihop V2V communications in either a VANET or VANETs via IP-
>    RSUs, a vehicular Mobile Ad Hoc Networks (MANET) routing protocol may
>    be required to support both unicast and multicast in the links of the
>    subnet with the same IPv6 prefix.  However, it will be costly to run
>    both vehicular ND and a vehicular ad hoc routing protocol in terms of
>    control traffic overhead [ID-Multicast-Problems].
>
> >>> we do that with IETF standards on battery operated devices already.
> Using
> RFC 8505 for the UNI and RPL for the NNI. It is scalable (we=E2=80=99ve s=
een 30
> hops in
> meshes of thousands in the real world though it=E2=80=99s not the normal
> operational
> model, but can happen to maintain connectivity during the reboot of a
> root) and
> does not use broadcast. RPL was initially designed as a V2V2V protocol bu=
t
> found its market on the IoT. I=E2=80=99m sure the protocol would gladly c=
ome back
> to
> its roots.
>
>    A routing protocol for a VANET may cause redundant wireless frames in
>    the air to check the neighborhood of each vehicle and compute the
>    routing information in a VANET with a dynamic network topology
>    because the IPv6 ND is used to check the neighborhood of each
>    vehicle.  Thus, the vehicular routing needs to take advantage of the
>    IPv6 ND to minimize its control overhead.
>
> >>> A clean description of the interaction of RPL and RFC 8505 in our IoT
> networks. Note that the speed of the PHY in VANET balanced the instabilit=
y
> of
> the topology, and RPL still applies. Note also that RPL uses DV with a
> routing
> stretch in order to minimize the topology awareness that=E2=80=99s needed=
 in each
> node,
> which results in minimal signaling.
>
> 5.2.  Mobility Management
>
> <snip>
>
>    For a mobility management scheme in a shared link, where the wireless
>    subnets of multiple IP-RSUs share the same prefix, an efficient
>    vehicular-network-wide DAD is required.  If DHCPv6 is used to assign
>    a unique IPv6 address to each vehicle in this shared link,
>
> >>> I would not use the term link, or shared. Maybe shared link -> domain=
?
> <snip>
>
> the DAD is
>    not required.  On the other hand, for a mobility management scheme
>    with a unique prefix per mobile node (e.g., PMIPv6 [RFC5213] and OMNI
>    [OMNI]), DAD is not required because the IPv6 address of a vehicle's
>    external wireless interface is guaranteed to be unique.
>
> >>> again overselling OMNI
> >>> As I said earlier, this is wring there are (64*) more chances of a
> collision in OMNI prefixes than in IPv6 IIDs. >>> OMNI prefixes can
> collision,
> home addresses that are unique on a home network cannot. >>> Now if both
> the
> OMNI prefix and the IID are good randoms, then obviously, the chances of
> collisions round up to 0. >>> Collision is certainly not my worst fear.
>
>   There is a
>    tradeoff between the prefix usage efficiency and DAD overhead.  Thus,
>    the IPv6 address autoconfiguration for vehicular networks needs to
>    consider this tradeoff to support efficient mobility management.
>
> >>> This is way too superficial and hides the reality of things.
> - Using a VANET Infra prefix allows direct routability to the internet
> which
> BYOA does not since the BYOA is not topologically correct. Yes, it costs =
a
> DAD
> with classic ND, but it does not with RCF8505 and the draft fails to
> mention
> that. - A BYOA needs a tunnel home, and the node needs to know who is
> reachable
> inside the VANET and what is not to decide to tunnel or not; this is a
> difficult problem (vs. control place overhead) that is not discussed here=
.
>
> <snip>
>
>    For the case of a multihomed network, a vehicle can follow the first-
>    hop router selection rule described in [RFC8028].  That is, the
>    vehicle should select its default router for each prefix by
>    preferring the router that advertised the prefix.
>
> >>> Still router discovery (in and out) must be very fast. Thing of the R=
A
> intervale in MIPv6. Is that sufficient? Too expensive?
>
> <snip>
>
> 6.  Security Considerations
> >>> Any discussion on the security of classical ND and other operational
> issues
> (rfc6583) ?
>
> <snip>
>
>    Security and privacy are paramount in V2I, V2V, and V2X networking.
>    Vehicles and infrastructure must be authenticated in order to
>    participate in vehicular networking.  Also, in-vehicle devices (e.g.,
>    ECU) and a driver/passenger's mobile devices (e.g., smartphone and
>    tablet PC) in a vehicle need to communicate with other in-vehicle
>    devices and another driver/passenger's mobile devices in another
>    vehicle, or other servers behind an IP-RSU in a secure way.  Even
>    though a vehicle is perfectly authenticated and legitimate, it may be
>    hacked for running malicious applications to track and collect its
>    and other vehicles' information.  In this case, an attack mitigation
>    process may be required to reduce the aftermath of malicious
>    behaviors.
>
> >>> The section should mention that both with classical ND and BYOA,
> addresses
> can be impersonated, and RFC 8928 protects against that in both cases whi=
le
> maintaining privacy.
>
>    Even though vehicles can be authenticated with valid certificates by
>    an authentication server in the vehicular cloud, the authenticated
>
> >>> Is PKI feasible (deploying it in every car?). Is it fast enough? Is i=
t
> really what IPWAVE thinks vehicle should use????? >>> e.g. why would one
> need
> to authenticate to a V2I network? >>> from the text earlier in the doc, i=
t
> seemed that what you really want is access that is fast to join, capable =
of
> offering the reachability you want, anonymous, and innocuous (cars can no=
t
> harm
> one another).
>
>    vehicles may harm other vehicles, so their communication activities
>    need to be logged in either a central way through a logging server
>    (e.g., TCC) in the vehicular cloud or a distributed way (e.g.,
>    blockchain [Bitcoin]) along with other vehicles or infrastructure.
>    For the non-repudiation of the harmful activities of malicious nodes,
>    a blockchain technology can be used [Bitcoin].  Each message from a
>    vehicle can be treated as a transaction and the neighboring vehicles
>    can play the role of peers in a consensus method of a blockchain
>    [Bitcoin][Vehicular-BlockChain].  For a blockchain's efficient
>    consensus in vehicular networks having fast moving vehicles, a new
>    consensus algorithm needs to be developed or an existing consensus
>    algorithm needs to be enhanced.
>
> >>> solution space; better express the  security needs since this is a PS=
.
>
> <snip>
>
>    To identify malicious vehicles among vehicles, an authentication
>    method is required.
>
> >>> No. As said earlier a vehicle can be infected. You need
> innocuousness.which
> can come from things like isolation, zerotrust, and protocols that are
> difficult to hack around. Classical IPv6 ND is open bar. RFC 8505/8928 is
> protected by construction, anonymous, and fast.
>
> <snip>
>
>    For the setup of a secure channel over IPsec or TLS, the multihop V2I
>    communications over DSRC is required in a highway for the
>    authentication by involving multiple intermediate vehicles as relay
>    nodes toward an IP-RSU connected to an authentication server in the
>    vehicular cloud.  The V2I communications over 5G V2X (or LTE V2X) is
>    required to allow a vehicle to communicate directly with a gNodeB (or
>    eNodeB) connected to an authentication server in the vehicular cloud.
>
> >>> solution space. Instead, you could mention that setting up secured
> channels
> between cars that cross one another might not complete in time to
> establish the
> communication channel, and that the innocuousness must come from zerotrus=
t
> in
> the transactions between the cars.
>    For the IPv6 ND, the DAD is required to ensure the uniqueness of the
>    IPv6 address of a vehicle's wireless interface.
>
> >>> for classical ND (SLAAC) that=E2=80=99s true. That is not with RFC 85=
05, since
> the
> infra maintains a table of all addresses in use in the prefix and blocks
> duplicates without the RFC 4862 DAD method. The stateful autoconf address
> grant
> is immediate.
>
>                                This DAD can be used
>    as a flooding attack that uses the DAD-related ND packets
>    disseminated over the VANET or vehicular networks.
>
> >>> also for DOS attacks. You can block a owner from using an address. A
> reference to rfc6959 is much needed here.
>
> <snip>
>
>  This possibility
>    indicates that the vehicles and IP-RSUs need to filter out suspicious
>    ND traffic in advance.  Based on the SEND [RFC3971] mechanism, the
>    authentication for routers (i.e., IP-RSUs) can be conducted by only
>    selecting an IP-RSU that has a certification path toward trusted
>    parties.  For authenticating other vehicles, the cryptographically
>    generated address (CGA) can be used to verify the true owner of a
>    received ND message, which requires to use the CGA ND option in the
>    ND protocols.  For a general protection of the ND mechanism, the RSA
>    Signature ND option can also be used to protect the integrity of the
>    messages by public key signatures.  For a more advanced
>    authentication mechanism, a distributed blockchain-based mechanism
>    [Vehicular-BlockChain] can be used.
>
> >>> solution space. Again, the draft should focus on problems and needs.
> The
> problem here is that SEND is complex, and not implemented in the major
> stack.
> It relies on PKI for trusting the router. The V2I need is a zerotrust mod=
el
> where one V, the other local Vs, and the I, can help each other
> anonymously and
> harmlessly. <snip>
>
> 8.  Informative References
>
> >>> no normative reference?
>
> >>> no normative reference?
>
> <snip>
>
> Voila!
>
> Keep safe;
>
> Pascal
>
>
>
>

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<div dir=3D"ltr">Pascal, thank=C2=A0you for the detailed review.<div><br></=
div><div>Paul, thank you for working through the feedback.</div></div><br><=
div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, Jun=
 18, 2021 at 12:42 AM Pascal Thubert via Datatracker &lt;<a href=3D"mailto:=
noreply@ietf.org">noreply@ietf.org</a>&gt; wrote:<br></div><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid r=
gb(204,204,204);padding-left:1ex">Reviewer: Pascal Thubert<br>
Review result: Not Ready<br>
<br>
Dear authors<br>
<br>
In summary:<br>
<br>
I read a number of very good drafts collated in one, from the use cases tha=
t<br>
very complete and ready to publish, to the architecture and protocol soluti=
on<br>
in section 4 that would require more work for completeness.<br>
<br>
There are multiple instances in the use cases where protocols are listed co=
ming<br>
out of the blue, e.g., the references to OMNI that seem artificially spread=
<br>
regardless of the context of the section. OMNI is used throughout, both as =
an<br>
open ended toolbox, and as a carpet under which all problems can be hidden.=
<br>
<br>
Reading this doc, OMNI shows as an interface to a software mobile router, w=
ith<br>
multiple of the device physical interfaces connected to the mobile router. =
This<br>
makes the stack very simple as the complexity moves to the router. But now =
you<br>
have to implement the router. Presented as that, the OMNI router deserves i=
ts<br>
name, it=E2=80=99s indeed very rich; it seems to cover all forms of MANET (=
many to<br>
choose from) and NEMO (and all the MIP protocol family across address<br>
families), all the possible radio interfaces on which the ND problems go aw=
ay<br>
by magic, and whatever else you want to put in there. Is that the intention=
?<br>
<br>
Instead of referring to OMNI for virtually anything, the doc should refer t=
o<br>
MANET for MANET things (like BYOD), NEMO for NEMO things (like MNP),<br>
draft-nordmark-intarea-ippl for split subnets, and<br>
draft-thubert-6man-ipv6-over-wireless for P2MP/NBMA link and subnet models.=
 And<br>
then you can say that all those components can be plugged in the OMNI route=
r,<br>
and you can discuss which MANET and which MIP you want, including using OMN=
I=E2=80=99s<br>
built in mobility.<br>
<br>
Note that my objections are not against the OMNI design, it might be the<br=
>
perfect thing and I am already aware of use cases that could be served by a=
<br>
P2MP interface like OMNI in conjunction with RFC8505 on the P2P subinterfac=
es<br>
(recycling the high level design we=E2=80=99ve been shipping for IPv4 / fra=
me relay for<br>
the last 30 years). My objection is of the way the draft uses [OMNI] as the=
<br>
magic wand that solves all the problems when what you really do is throw th=
em<br>
over the fence. I=E2=80=99d rather you focus on problems and use cases, for=
 which<br>
there=E2=80=99s excellent text, and indicate what needs to be done without =
making<br>
assumption on how the needful things will be solved.<br>
<br>
In agreement with a discussion on the 6MAN list, I=E2=80=99d suggest to spl=
it, keep all<br>
that=E2=80=99s use case and problem description and ship it, remove referen=
ces to<br>
protocols envisioned in the solution, and start the work on architecture of=
 the<br>
solution and the protocol applicability statements separately. An alternate=
<br>
would be to centralize the discussion on protocols to annex, and explain th=
at<br>
protocol A or B could be envisioned in solution space because to over this =
gap<br>
or implement that function.<br>
<br>
In any fashion, the current text is not ready for publication as applicabil=
ity<br>
statement, architecture and or/solution, so the related work should be remo=
ved<br>
from the main text. But I find it mostly ready for use case and problem<br>
statement, more below.<br>
<br>
Review:<br>
<br>
Abstract<br>
<br>
=C2=A0 =C2=A0This document discusses the problem statement and use cases of=
<br>
=C2=A0 =C2=A0IPv6-based vehicular networking for Intelligent Transportation=
<br>
=C2=A0 =C2=A0Systems (ITS).<br>
<br>
&gt;&gt;&gt; The document goes beyond that; there was actually a thread at =
6MAN where<br>
Bob Hinden said =E2=80=9C This document says it is a problem statement, but=
 then<br>
becomes a solution document.=C2=A0 =C2=A0Might be better to cut it down to =
only the<br>
problem statement part. =E2=80=9C &gt;&gt;&gt; Would you consider doing thi=
s? If not, why? Note:<br>
you may want to respond on 6MAN as well. &gt;&gt;&gt; &gt;&gt;&gt;I would h=
ave thought that the<br>
traditional steps of problem statement and applicability statement of exist=
ing<br>
work could be expected from IPWAVE too. &gt;&gt;&gt; Please clarify the ste=
ps that you<br>
intend to follow next with this work.<br>
<br>
&lt;snip&gt;<br>
<br>
1.=C2=A0 Introduction<br>
<br>
&gt;&gt;&gt; Very readable and informative section, many thanks!<br>
<br>
=C2=A0 =C2=A0Along with these WAVE standards and C-V2X standards, regardles=
s of a<br>
=C2=A0 =C2=A0wireless access technology under the IP stack of a vehicle, ve=
hicular<br>
=C2=A0 =C2=A0networks can operate IP mobility with IPv6 [RFC8200] and Mobil=
e IPv6<br>
=C2=A0 =C2=A0protocols (e.g., Mobile IPv6 (MIPv6) [RFC6275], Proxy MIPv6 (P=
MIPv6)<br>
=C2=A0 =C2=A0[RFC5213], Distributed Mobility Management (DMM) [RFC7333], Lo=
cator/<br>
=C2=A0 =C2=A0ID Separation Protocol (LISP) [RFC6830BIS], and Asymmetric Ext=
ended<br>
=C2=A0 =C2=A0Route Optimization (AERO) [RFC6706BIS]).<br>
<br>
&gt;&gt;&gt; NEMO (RFC 3963) is not cited. Any reason why the vehicle would=
 not<br>
transport a network?<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0This document describes use cases and a problem statement abou=
t<br>
=C2=A0 =C2=A0IPv6-based vehicular networking for ITS, which is named IPv6 W=
ireless<br>
=C2=A0 =C2=A0Access in Vehicular Environments (IPWAVE).=C2=A0 First, it int=
roduces the<br>
=C2=A0 =C2=A0use cases for using V2V, V2I, and V2X networking in ITS.=C2=A0=
 Next, for<br>
=C2=A0 =C2=A0IPv6-based vehicular networks, it makes a gap analysis of curr=
ent<br>
=C2=A0 =C2=A0IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mobility Manage=
ment,<br>
=C2=A0 =C2=A0and Security &amp; Privacy), and then enumerates requirements =
for the<br>
=C2=A0 =C2=A0extensions of those IPv6 protocols, which are tailored to IPv6=
-based<br>
=C2=A0 =C2=A0vehicular networking.=C2=A0 Thus, this document is intended to=
 motivate<br>
=C2=A0 =C2=A0development of key protocols for IPWAVE.<br>
<br>
&gt;&gt;&gt;<br>
<br>
&lt;snip&gt;<br>
<br>
2.=C2=A0 Terminology<br>
<br>
&gt;&gt;&gt;<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0o=C2=A0 IP-OBU: &quot;Internet Protocol On-Board Unit&quot;: A=
n IP-OBU denotes a<br>
=C2=A0 =C2=A0 =C2=A0 computer situated in a vehicle (e.g., car, bicycle, au=
tobike,<br>
=C2=A0 =C2=A0 =C2=A0 motor cycle, and a similar one) and a device (e.g., sm=
artphone and<br>
=C2=A0 =C2=A0 =C2=A0 IoT device).=C2=A0 It has at least one IP interface th=
at runs in IEEE<br>
=C2=A0 =C2=A0 =C2=A0 802.11-OCB and has an &quot;OBU&quot; transceiver.=C2=
=A0 Also, it may have an IP<br>
=C2=A0 =C2=A0 =C2=A0 interface that runs in Cellular V2X (C-V2X) [TS-23.285=
-3GPP]<br>
=C2=A0 =C2=A0 =C2=A0 [TR-22.886-3GPP][TS-23.287-3GPP].=C2=A0 See the defini=
tion of the term<br>
=C2=A0 =C2=A0 =C2=A0 &quot;OBU&quot; in [RFC8691].<br>
<br>
&gt;&gt;&gt; Can that be a router connecting multiple computers?<br>
<br>
&lt;snip&gt;<br>
<br>
3.=C2=A0 Use Cases<br>
<br>
&gt;&gt;&gt; This is another great read and an enlightening section. Maybe =
mention in<br>
the abstract that the doc also covers use cases?<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0Although a Layer-2 solution can provide a support for multihop=
<br>
=C2=A0 =C2=A0communications in vehicular networks, the scalability issue re=
lated<br>
=C2=A0 =C2=A0to multihop forwarding still remains when vehicles need to<br>
=C2=A0 =C2=A0disseminate or forward packets toward multihop-away destinatio=
ns.=C2=A0 In<br>
=C2=A0 =C2=A0addition, the IPv6-based approach for V2V as a network layer p=
rotocol<br>
=C2=A0 =C2=A0can accommodate multiple radio technologies as MAC protocols, =
such as<br>
=C2=A0 =C2=A05G V2X and DSRC.=C2=A0 Therefore, the existing IPv6 protocol c=
an be<br>
=C2=A0 =C2=A0augmented through the addition of an Overlay Multilink Network=
 (OMNI)<br>
=C2=A0 =C2=A0Interface [OMNI] and/or protocol changes in order to support b=
oth<br>
=C2=A0 =C2=A0wireless single-hop/multihop V2V communications and multiple r=
adio<br>
=C2=A0 =C2=A0technologies in vehicular networks.=C2=A0 In such a way, vehic=
les can<br>
=C2=A0 =C2=A0communicate with each other by V2V communications to share eit=
her an<br>
=C2=A0 =C2=A0emergency situation or road hazard in a highway having multipl=
e kinds<br>
=C2=A0 =C2=A0of radio technologies, such as 5G V2X and DSRC.<br>
<br>
&gt;&gt;&gt; This text appears in the middle of high level use case, with a=
 crude list<br>
of protocols; this is not a place for it<br>
<br>
&gt;&gt;&gt; On a 6MAN Thread, Brian Carpenter said that the above:<br>
=E2=80=9C<br>
is of concern regardless of the mention of OMNI. Does it mean &quot;can be&=
quot; or<br>
&quot;needs to be&quot;? This paragraph seems like a very short summary of =
a big problem<br>
area. At the end of page 13 there is some related discussion, which mention=
s<br>
RPL as part of the solution (good choice, IMHO) but again seems to depend o=
n<br>
OMNI. I don&#39;t think the fix of simply removing references to OMNI works=
,<br>
because it would leave a gap. In an informational document, that is not a<b=
r>
formal problem but as far as this draft describes architecture, I don&#39;t=
 think<br>
that big a gap is reasonable. &quot;OMNI&quot; is mentioned more than 20 ti=
mes in the<br>
document. There are also several references to AERO, which is strongly<br>
associated with OMNI. =E2=80=9C &gt;&gt;&gt; I agree with Brian. Here the d=
ocument seems to be<br>
mixing solution with problem and putting the cart before the horse. My<br>
recommendation is to stick to what needs to be done that IPv6 does not do y=
et<br>
-the reqs and gaps-; but the doc should not step in the how things will be =
done<br>
unless the group already decided to do it. The logical next steps to a PS a=
re<br>
an applicability statement of existing work, and if the gaps cannot be fill=
ed,<br>
there may be one or more WG chartered to fill those gaps.<br>
<br>
&gt;&gt;&gt; I=E2=80=99d still be happy to see an annex with leads on where=
 the solution might<br>
come from like RFC 8691 does.<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0The existing IPv6 protocol must be augmented through the addit=
ion of<br>
=C2=A0 =C2=A0an OMNI interface and/or protocol changes in order to support<=
br>
=C2=A0 =C2=A0wireless multihop V2I communications in a highway where RSUs a=
re<br>
=C2=A0 =C2=A0sparsely deployed, so a vehicle can reach the wireless coverag=
e of an<br>
=C2=A0 =C2=A0RSU through the multihop data forwarding of intermediate vehic=
les.<br>
=C2=A0 =C2=A0Thus, IPv6 needs to be extended for multihop V2I communication=
s.<br>
<br>
&gt;&gt;&gt; Note that I have no clue on how well OMNI applies in that spac=
e, maybe it<br>
does very well; but here it comes out of the blue with no justification. If=
 you<br>
mention OMNI you need to detail what it is and which of the V2V=C2=A0 probl=
ems you<br>
expect it to solve. But then, that=E2=80=99s beyond the scope of a PS.<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0The existing IPv6 protocol must be augmented through the addit=
ion of<br>
=C2=A0 =C2=A0an OMNI interface and/or protocol changes in order to support<=
br>
=C2=A0 =C2=A0wireless multihop V2X (or V2I2X) communications in an urban ro=
ad<br>
=C2=A0 =C2=A0network where RSUs are deployed at intersections, so a vehicle=
 (or a<br>
=C2=A0 =C2=A0pedestrian&#39;s smartphone) can reach the wireless coverage o=
f an RSU<br>
=C2=A0 =C2=A0through the multihop data forwarding of intermediate vehicles =
(or<br>
=C2=A0 =C2=A0pedestrians&#39; smartphones).=C2=A0 Thus, IPv6 needs to be ex=
tended for<br>
=C2=A0 =C2=A0multihop V2X (or V2I2X) communications.<br>
<br>
&gt;&gt;&gt; Please be more specific on what the missing functions are and =
whether they<br>
are missing from the stack development standpoint or if there=E2=80=99s wor=
k needed<br>
from the IETF. 1)=C2=A0 =C2=A0 =C2=A0 If something is really missing in our=
 specs, the text to<br>
prove from the use case above is missing 2)=C2=A0 =C2=A0 =C2=A0 how OMNI se=
rves the use case<br>
could be elaborated in an applicability statement of OMNI for V2xyz, but it=
 is<br>
a bit blunt to present it as panacea when the problems to be solved are not=
<br>
listed. 3)=C2=A0 =C2=A0 =C2=A0 If you look at it, OMNI seems like a softwar=
e mobile router<br>
within a bump in the stack. Can that become too big?<br>
<br>
&gt;&gt;&gt; my view is that the text above and the similar occasions shoul=
d be replaced<br>
by something like :<br>
<br>
=C2=A0 =C2=A0The existing IPv6 protocol must be augmented to provide the fo=
llowing<br>
=C2=A0 =C2=A0functions: 1) =E2=80=A6<br>
<br>
&gt;&gt;&gt; and / or something like:<br>
<br>
=C2=A0 =C2=A0In addition to the IPv6 node requirements [RFC 8504], the IPv6=
 protocol<br>
=C2=A0 =C2=A0stack for use in a vehicle must support 1) RFC blah, 2) =E2=80=
=A6<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0To support applications of these V2X use cases, the functions =
of IPv6<br>
=C2=A0 =C2=A0such as VND, VMM, and VSP are prerequisites for IPv6-based pac=
ket<br>
=C2=A0 =C2=A0exchange, transport-layer session continuity, and secure, safe=
<br>
=C2=A0 =C2=A0communication between a vehicle and a pedestrian either direct=
ly or<br>
=C2=A0 =C2=A0indirectly via an IP-RSU.<br>
<br>
&gt;&gt;&gt; =E2=80=9Cthe functions of IPv6 such as VND, VMM, and VSP=E2=80=
=9D does not parse. There=E2=80=99s<br>
no IPv6 reference that provides those functions. If the intention is to say=
<br>
that there=E2=80=99s stuff to add to IPv6 to support, like, say,=C2=A0 VND,=
 then this<br>
document fails to define how an IPv6 VND should behave, though it=E2=80=99s=
 precisely<br>
what I=E2=80=99d expect from a problem statement.<br>
<br>
&lt;snip&gt;<br>
<br>
4.=C2=A0 Vehicular Networks<br>
<br>
&gt;&gt;&gt; What is the purpose of section 4 as a whole, problem statement=
 or<br>
applicability statement of the listed protocols? In the former case what=E2=
=80=99s the<br>
problem? In the latter case it is incomplete and needs to be exported to an=
<br>
applicability statement doc with all the possible technologies evaluated.<b=
r>
<br>
=C2=A0 =C2=A0This section describes an example vehicular network architectu=
re<br>
=C2=A0 =C2=A0supporting V2V, V2I, and V2X communications in vehicular netwo=
rks.<br>
<br>
&gt;&gt;&gt; I read this as presenting a context to explain what the proble=
ms are<br>
instead of presenting the IPVAWE =E2=80=9Carchitecture=E2=80=9D. Maybe usin=
g the term<br>
=E2=80=9CArchitecture=E2=80=9D here is misleading and led to Bob=E2=80=99s =
comment.<br>
<br>
&lt;snip&gt;<br>
<br>
4.1.=C2=A0 Vehicular Network Architecture<br>
<br>
=C2=A0 =C2=A0Figure 1 shows an example vehicular network architecture for V=
2I and<br>
=C2=A0 =C2=A0V2V in a road network [OMNI].<br>
<br>
a.=C2=A0 =C2=A0 =C2=A0 Is using OMNI a decision that the WG made for the fu=
ture work ? what<br>
does it do and what does it not do? b.=C2=A0 =C2=A0 =C2=A0 Is there work le=
ft to be done? Who<br>
will do that work? Or is it the expectation that OMNI has it all defined<br=
>
already?<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0An existing network architecture (e.g., an IP-based aeronautic=
al<br>
=C2=A0 =C2=A0network architecture [OMNI][UAM-ITS], a network architecture o=
f<br>
=C2=A0 =C2=A0PMIPv6 [RFC5213], and a low-power and lossy network architectu=
re<br>
=C2=A0 =C2=A0[RFC6550]) can be extended to a vehicular network architecture=
 for<br>
=C2=A0 =C2=A0multihop V2V, V2I, and V2X, as shown in Figure 1.=C2=A0 In a h=
ighway<br>
=C2=A0 =C2=A0scenario, a vehicle may not access an RSU directly because of =
the<br>
=C2=A0 =C2=A0distance of the DSRC coverage (up to 1 km).=C2=A0 For example,=
 the OMNI<br>
=C2=A0 =C2=A0interface and/or RPL (IPv6 Routing Protocol for Low-Power and =
Lossy<br>
=C2=A0 =C2=A0Networks) [RFC6550] can be extended to support a multihop V2I =
since a<br>
=C2=A0 =C2=A0vehicle can take advantage of other vehicles as relay nodes to=
 reach<br>
=C2=A0 =C2=A0the RSU.=C2=A0 Also, RPL can be extended to support both multi=
hop V2V and<br>
=C2=A0 =C2=A0V2X in the similar way.<br>
<br>
&gt;&gt;&gt; all this could fit well in annex; anyway you need to explain w=
hat you<br>
expect the protocols to do and which extension is needed. In the case of RP=
L at<br>
least you indicate that it would do routing, but not why you cannot use it =
of<br>
the shelf; for OMNI, what you expect is less clear, though there=E2=80=99s =
text<br>
elsewhere about the many radio interfaces that could be used for the purpos=
e,<br>
and the text in the UAM below that is enlightening.<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 To support not only the mobil=
ity<br>
=C2=A0 =C2=A0management of the UAM end systems, but also the multihop and<b=
r>
=C2=A0 =C2=A0multilink communications of the UAM interfaces, the UAM end sy=
stems<br>
=C2=A0 =C2=A0can employ an Overlay Multilink Network (OMNI) interface [OMNI=
] as a<br>
=C2=A0 =C2=A0virtual Non-Broadcast Multiple Access (NBMA) connection to a s=
erving<br>
=C2=A0 =C2=A0ground domain infrastructure.<br>
<br>
&gt;&gt;&gt; Again, what is the expectation for OMNI? As an overlay it requ=
ires an<br>
underlay; when connecting to a MANET it needs support for that MANET. The t=
ext<br>
above seems to imply that is solves everything in V2xyz like magic; reminds=
 me<br>
of the IPv6 multicast abstraction that was supposed to solve the broadcast<=
br>
problem and ended up worsening it.<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 This infrastructure can be configured<br>
=C2=A0 =C2=A0over the underlying data links.=C2=A0 The OMNI interface and i=
ts link<br>
=C2=A0 =C2=A0model provide a means of multilink, multihop and mobility<br>
=C2=A0 =C2=A0coordination to the legacy IPv6 ND messaging [RFC4861] accordi=
ng to<br>
=C2=A0 =C2=A0the NBMA principle.=C2=A0 Thus, the OMNI link model can suppor=
t efficient<br>
=C2=A0 =C2=A0UAM internetworking services without additional mobility messa=
ging,<br>
=C2=A0 =C2=A0and without any modification to the IPv6 ND messaging services=
 or<br>
=C2=A0 =C2=A0link model.<br>
<br>
&gt;&gt;&gt; Again, what is the expectation for OMNI? As an overlay it requ=
ires an<br>
underlay; the text above seems to imply that is solves everything in V2xyz =
like<br>
magic; that would be a stretch, that reminds me of IPv6 multicast that was<=
br>
supposed to solve the broadcast problem and ended up worsening it.<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0Multiple vehicles under the coverage of an RSU share a prefix =
just as<br>
=C2=A0 =C2=A0mobile nodes share a prefix of a Wi-Fi access point in a wirel=
ess<br>
=C2=A0 =C2=A0LAN.=C2=A0 This is a natural characteristic in infrastructure-=
based<br>
=C2=A0 =C2=A0wireless networks.=C2=A0 For example, in Figure 1, two vehicle=
s (i.e.,<br>
=C2=A0 =C2=A0Vehicle2, and Vehicle5) can use Prefix 1 to configure their IP=
v6<br>
=C2=A0 =C2=A0global addresses for V2I communication.=C2=A0 Alternatively, m=
obile nodes<br>
=C2=A0 =C2=A0can employ an OMNI interface and use their own IPv6 Unique Loc=
al<br>
=C2=A0 =C2=A0Addresses (ULAs) [RFC4193] over the wireless network without<b=
r>
=C2=A0 =C2=A0requiring the messaging of IPv6 Stateless Address Autoconfigur=
ation<br>
=C2=A0 (SLAAC) [RFC4862], which uses an on-link prefix provided by the<br>
=C2=A0 =C2=A0(visited) wireless LAN; this technique is known as &quot;Bring=
-Your-Own-<br>
=C2=A0 =C2=A0Addresses&quot;.<br>
<br>
&gt;&gt;&gt;=C2=A0 Is OMNI the only way to &quot;Bring-Your-Own-Addresses=
=E2=80=9D? Else the text could be<br>
more generic, at least use e.g., like the ref to AERO later. &gt;&gt;&gt; W=
hat are the<br>
implications / limitations of doing that =E2=80=93 like they can do line of=
 sight V2V<br>
but not reach the internet, or the need of=C2=A0 a local MANET / RPL that w=
ill<br>
accept to route those addresses, or the security / address ownership valida=
tion<br>
issues ?<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0A single subnet prefix announced by an RSU can span multiple v=
ehicles<br>
=C2=A0 =C2=A0in VANET.=C2=A0 For example, in Figure 1, for Prefix 1, three =
vehicles<br>
=C2=A0 =C2=A0(i.e., Vehicle1, Vehicle2, and Vehicle5) can construct a conne=
cted<br>
=C2=A0 =C2=A0VANET.=C2=A0 Also, for Prefix 2, two vehicles (i.e., Vehicle3 =
and<br>
=C2=A0 =C2=A0Vehicle6) can construct another connected VANET, and for Prefi=
x 3,<br>
=C2=A0 =C2=A0two vehicles (i.e., Vehicle4 and Vehicle7) can construct anoth=
er<br>
=C2=A0 =C2=A0connected VANET.=C2=A0 Alternatively, each vehicle could emplo=
y an OMNI<br>
=C2=A0 =C2=A0interface with their own ULAs such that no topologically-orien=
ted<br>
=C2=A0 =C2=A0subnet prefixes need be announced by the RSU.<br>
<br>
&gt;&gt;&gt;=C2=A0 same as above. This seems to restate the same thing, der=
ive an address<br>
from a topologically correct prefix or use your own with limitations to be<=
br>
described.<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0For IPv6 packets transported over IEEE 802.11-OCB, [RFC8691]<b=
r>
=C2=A0 =C2=A0specifies several details, including Maximum Transmission Unit=
 (MTU),<br>
=C2=A0 =C2=A0frame format, link-local address, address mapping for unicast =
and<br>
=C2=A0 =C2=A0multicast, stateless autoconfiguration, and subnet structure.=
=C2=A0 An<br>
=C2=A0 =C2=A0Ethernet Adaptation (EA) layer is in charge of transforming so=
me<br>
=C2=A0 =C2=A0parameters between the IEEE 802.11 MAC layer and the IPv6 netw=
ork<br>
=C2=A0 =C2=A0layer, which is located between the IEEE 802.11-OCB&#39;s logi=
cal link<br>
=C2=A0 =C2=A0control layer and the IPv6 network layer.=C2=A0 This IPv6 over=
 802.11-OCB<br>
=C2=A0 =C2=A0can be used for both V2V and V2I in IPv6-based vehicular netwo=
rks.<br>
<br>
&gt;&gt;&gt;=C2=A0 solution space.<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0An IPv6 mobility solution is needed for the guarantee of<br>
=C2=A0 =C2=A0communication continuity in vehicular networks so that a vehic=
le&#39;s<br>
=C2=A0 =C2=A0TCP session can be continued, or UDP packets can be delivered =
to a<br>
=C2=A0 =C2=A0vehicle as a destination without loss while it moves from an I=
P-RSU&#39;s<br>
=C2=A0 =C2=A0wireless coverage to another IP-RSU&#39;s wireless coverage.=
=C2=A0 In<br>
=C2=A0 =C2=A0Figure 1, assuming that Vehicle2 has a TCP session (or a UDP s=
ession)<br>
=C2=A0 =C2=A0with a corresponding node in the vehicular cloud, Vehicle2 can=
 move<br>
=C2=A0 =C2=A0from IP-RSU1&#39;s wireless coverage to IP-RSU2&#39;s wireless=
 coverage.=C2=A0 In<br>
=C2=A0 =C2=A0this case, a handover for Vehicle2 needs to be performed by ei=
ther a<br>
=C2=A0 =C2=A0host-based mobility management scheme (e.g., MIPv6 [RFC6275]) =
or a<br>
=C2=A0 =C2=A0network-based mobility management scheme (e.g., PMIPv6 [RFC521=
3] and<br>
=C2=A0 =C2=A0AERO [RFC6706BIS]).<br>
<br>
=C2=A0 =C2=A0In the host-based mobility scheme (e.g., MIPv6), an IP-RSU pla=
ys a<br>
=C2=A0 =C2=A0role of a home agent.=C2=A0 On the other hand, in the network-=
based<br>
=C2=A0 =C2=A0mobility scheme (e.g., PMIPv6, an MA plays a role of a mobilit=
y<br>
=C2=A0 =C2=A0management controller such as a Local Mobility Anchor (LMA) in=
<br>
=C2=A0 =C2=A0PMIPv6, which also serves vehicles as a home agent, and an IP-=
RSU<br>
=C2=A0 =C2=A0plays a role of an access router such as a Mobile Access Gatew=
ay<br>
=C2=A0 =C2=A0(MAG) in PMIPv6 [RFC5213].=C2=A0 The host-based mobility schem=
e needs<br>
=C2=A0 =C2=A0client functionality in IPv6 stack of a vehicle as a mobile no=
de for<br>
=C2=A0 =C2=A0mobility signaling message exchange between the vehicle and ho=
me<br>
=C2=A0 =C2=A0agent.=C2=A0 On the other hand, the network-based mobility sch=
eme does not<br>
=C2=A0 =C2=A0need such a client functionality for a vehicle because the net=
work<br>
=C2=A0 =C2=A0infrastructure node (e.g., MAG in PMIPv6) as a proxy mobility =
agent<br>
=C2=A0 =C2=A0handles the mobility signaling message exchange with the home =
agent<br>
=C2=A0 =C2=A0(e.g., LMA in PMIPv6) for the sake of the vehicle.<br>
<br>
=C2=A0 =C2=A0There are a scalability issue and a route optimization issue i=
n the<br>
=C2=A0 =C2=A0network-based mobility scheme (e.g., PMIPv6) when an MA covers=
 a<br>
=C2=A0 =C2=A0large vehicular network governing many IP-RSUs.=C2=A0 In this =
case, a<br>
=C2=A0 =C2=A0distributed mobility scheme (e.g., DMM [RFC7429]) can mitigate=
 the<br>
=C2=A0 =C2=A0scalability issue by distributing multiple MAs in the vehicula=
r<br>
=C2=A0 =C2=A0network such that they are positioned closer to vehicles for r=
oute<br>
=C2=A0 =C2=A0optimization and bottleneck mitigation in a central MA in the<=
br>
=C2=A0 =C2=A0network-based mobility scheme.=C2=A0 All these mobility approa=
ches (i.e.,<br>
=C2=A0 =C2=A0a host-based mobility scheme, network-based mobility scheme, a=
nd<br>
=C2=A0 =C2=A0distributed mobility scheme) and a hybrid approach of a combin=
ation<br>
=C2=A0 =C2=A0of them need to provide an efficient mobility service to vehic=
les<br>
=C2=A0 =C2=A0moving fast and moving along with the relatively predictable<b=
r>
=C2=A0 =C2=A0trajectories along the roadways.<br>
<br>
=C2=A0 =C2=A0In vehicular networks, the control plane can be separated from=
 the<br>
=C2=A0 =C2=A0data plane for efficient mobility management and data forwardi=
ng by<br>
=C2=A0 =C2=A0using the concept of Software-Defined Networking (SDN)<br>
=C2=A0 =C2=A0[RFC7149][DMM-FPC].=C2=A0 Note that Forwarding Policy Configur=
ation (FPC)<br>
=C2=A0 =C2=A0in [DMM-FPC], which is a flexible mobility management system, =
can<br>
=C2=A0 =C2=A0manage the separation of data-plane and control-plane in DMM.=
=C2=A0 In<br>
=C2=A0 =C2=A0SDN, the control plane and data plane are separated for the ef=
ficient<br>
=C2=A0 =C2=A0management of forwarding elements (e.g., switches and routers)=
 where<br>
=C2=A0 =C2=A0an SDN controller configures the forwarding elements in a cent=
ralized<br>
=C2=A0 =C2=A0way and they perform packet forwarding according to their forw=
arding<br>
=C2=A0 =C2=A0tables that are configured by the SDN controller.=C2=A0 An MA =
as an SDN<br>
=C2=A0 =C2=A0controller needs to efficiently configure and monitor its IP-R=
SUs and<br>
=C2=A0 =C2=A0vehicles for mobility management, location management, and sec=
urity<br>
=C2=A0 =C2=A0services.<br>
<br>
=C2=A0 =C2=A0The mobility information of a GPS receiver mounted in its vehi=
cle<br>
=C2=A0 =C2=A0(e.g., position, speed, and direction) can be used to accommod=
ate<br>
=C2=A0 =C2=A0mobility-aware proactive handover schemes, which can perform t=
he<br>
=C2=A0 =C2=A0handover of a vehicle according to its mobility and the wirele=
ss<br>
=C2=A0 =C2=A0signal strength of a vehicle and an IP-RSU in a proactive way.=
<br>
<br>
=C2=A0 =C2=A0Vehicles can use the TCC as their Home Network having a home a=
gent<br>
=C2=A0 =C2=A0for mobility management as in MIPv6 [RFC6275] and PMIPv6 [RFC5=
213],<br>
=C2=A0 =C2=A0so the TCC (or an MA inside the TCC) maintains the mobility<br=
>
=C2=A0 =C2=A0information of vehicles for location management.=C2=A0 IP tunn=
eling over<br>
=C2=A0 =C2=A0the wireless link should be avoided for performance efficiency=
.<br>
=C2=A0 =C2=A0Also, in vehicular networks, asymmetric links sometimes exist =
and<br>
=C2=A0 =C2=A0must be considered for wireless communications such as V2V and=
 V2I.<br>
<br>
&gt;&gt;&gt;=C2=A0 This is all very informative text but does not state a p=
roblem. Is there a<br>
problem is left to be solved or are we assessing the applicability of<br>
protocols? Could it for instance, forward point to issues discussed in sect=
ion<br>
5?<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0As shown in Figure 3, as internal networks, a vehicle&#39;s mo=
ving<br>
=C2=A0 =C2=A0network and an EN&#39;s fixed network are self-contained netwo=
rks having<br>
=C2=A0 =C2=A0multiple subnets and having an edge router (e.g., IP-OBU and I=
P-RSU)<br>
=C2=A0 =C2=A0for the communication with another vehicle or another EN.=C2=
=A0 The<br>
=C2=A0 =C2=A0internetworking between two internal networks via V2I communic=
ation<br>
=C2=A0 =C2=A0requires the exchange of the network parameters and the networ=
k<br>
=C2=A0 =C2=A0prefixes of the internal networks.=C2=A0 For the efficiency, t=
he network<br>
=C2=A0 =C2=A0prefixes of the internal networks (as a moving network) in a v=
ehicle<br>
=C2=A0 =C2=A0need to be delegated and configured automatically.=C2=A0 Note =
that a<br>
=C2=A0 =C2=A0moving network&#39;s network prefix can be called a Mobile Net=
work Prefix<br>
=C2=A0 =C2=A0(MNP) [OMNI].<br>
<br>
&gt;&gt;&gt; Then again you=E2=80=99re overselling OMNI. MNP is originally =
defined here<br>
<a href=3D"https://datatracker.ietf.org/doc/html/rfc3963#section-2" rel=3D"=
noreferrer" target=3D"_blank">https://datatracker.ietf.org/doc/html/rfc3963=
#section-2</a> and that=E2=80=99s a reference<br>
you can use normatively.<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0As shown in Figure 3, the addresses used for IPv6 transmission=
s over<br>
=C2=A0 =C2=A0the wireless link interfaces for IP-OBU and IP-RSU can be eith=
er<br>
=C2=A0 =C2=A0global IPv6 addresses, or IPv6 ULAs as long as IPv6 packets ca=
n be<br>
=C2=A0 =C2=A0routed within vehicular networks [OMNI].<br>
<br>
&gt;&gt;&gt; Then again you=E2=80=99re overselling OMNI. There needs to=C2=
=A0 be a routing protocol<br>
like a MANET that will accept to carry the<br>
=C2=A0MNPs, and that must be implemented by the infra and both cars. The OM=
NI spec<br>
=C2=A0is clear on that. This is why at first glance I see OMNI as a full mo=
bile<br>
=C2=A0router in a bump in the stack. Now what is the problem behind this? N=
o such<br>
=C2=A0protocol at IETF? Too many to choose from? No deployment?<br>
&lt;snip&gt;<br>
<br>
When global IPv6 addresses<br>
=C2=A0 =C2=A0are used, wireless interface configuration and control overhea=
d for<br>
=C2=A0 =C2=A0Duplicate Address Detection (DAD) [RFC4862] and Multicast List=
ener<br>
=C2=A0 =C2=A0Discovery (MLD) [RFC2710][RFC3810] should be minimized to supp=
ort V2I<br>
=C2=A0 =C2=A0and V2X communications for vehicles moving fast along roadways=
; when<br>
=C2=A0 =C2=A0ULAs and the OMNI interface are used, no DAD nor MLD messaging=
 is<br>
=C2=A0 =C2=A0needed.<br>
<br>
&gt;&gt;&gt; Then again you=E2=80=99re overselling OMNI. Isn=E2=80=99t it t=
he no dad needed a property<br>
of injecting a BYOA in the fabric for an GUA MIP Home Address which is know=
n to<br>
be unique at home? &gt;&gt;&gt; OTOH, autoconf=E2=80=99ing a random ULA =E2=
=80=9CFD=E2=80=A6=E2=80=9Dprefix has lesser<br>
DAD properties than autoconf=E2=80=99ing a random 64bit IID in a classical =
subnet. So<br>
who says DAD isn=E2=80=99t required for OMNI ULA? &gt;&gt;&gt; note that IM=
HO DAD on wireless is<br>
a lot more harm than good, and I agree that with a good pseudo random gener=
ator<br>
the ULA has no chance to collision in the real world, as OMNI claims. It=E2=
=80=99s just<br>
that your argument here plays the other way, because there are less random =
bits<br>
(56)=C2=A0 in the ULA prefix than in the IID (62), and if one starts using =
more<br>
prefix bits to be non-random, there will be a time when DAD on prefix is ne=
eded.<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0Let us consider the upload/download time of a vehicle when it =
passes<br>
=C2=A0 =C2=A0through the wireless communication coverage of an IP-RSU.=C2=
=A0 For a<br>
=C2=A0 =C2=A0given typical setting where 1km is the maximum DSRC communicat=
ion<br>
=C2=A0 =C2=A0range [DSRC] and 100km/h is the speed limit in highway, the dw=
elling<br>
=C2=A0 =C2=A0time can be calculated to be 72 seconds by dividing the diamet=
er of<br>
=C2=A0 =C2=A0the 2km (i.e., two times of DSRC communication range where an =
IP-RSU<br>
=C2=A0 =C2=A0is located in the center of the circle of wireless communicati=
on) by<br>
=C2=A0 =C2=A0the speed limit of 100km/h (i.e., about 28m/s).=C2=A0 For the =
72 seconds,<br>
=C2=A0 =C2=A0a vehicle passing through the coverage of an IP-RSU can upload=
 and<br>
=C2=A0 =C2=A0download data packets to/from the IP-RSU.<br>
<br>
&lt;snip&gt;<br>
<br>
4.3.=C2=A0 V2V-based Internetworking<br>
<br>
&gt;&gt;&gt; In this section it looks like the cars are in a stable line of=
 sight<br>
relationship. Which is probably fine for a platoon, but when you drive alon=
g<br>
with friends in different cars, you realize that the line of sight assumpti=
on<br>
does not stand over time. Soon enough, other cars meddle in, and possibly o=
ne<br>
of the cars drives faster and too far ahead so you need the infra to relay,=
<br>
possibly over multiple infra hops.<br>
<br>
&gt;&gt;&gt; so in this section, I=E2=80=99d expect to see a Vehicle commun=
icating with another<br>
one and using either line of sight or V2V relaying but also using relay via=
 V2I<br>
(multihop I2I not just hub and spoke V2I2V ), alternatively to together for=
<br>
redundancy. Is that part of the problem?<br>
<br>
&gt;&gt;&gt; reading deeper section 5 I found excellent text on routing via=
 V and via I.<br>
This tells that section 4 does not play a good role at justifying section 5=
.<br>
Maybe keep section 4 for another doc?<br>
<br>
&gt;&gt;&gt; What kind or reliability is required in a V2V use case? Do you=
 think ND can<br>
handle it? Or MANET? What would be the assumption on L2 (roaming time, unic=
ast<br>
vs P2MP) and on L3 (reliability ala DetNet/RAW). Should we have some L3 <br=
>
redundancy?<br>
<br>
&lt;snip&gt;<br>
<br>
5.=C2=A0 Problem Statement<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0In order to specify protocols using the architecture mentioned=
 in<br>
=C2=A0 =C2=A0Section 4.1, IPv6 core protocols have to be adapted to overcom=
e<br>
=C2=A0 =C2=A0certain challenging aspects of vehicular networking.=C2=A0 Sin=
ce the<br>
=C2=A0 =C2=A0vehicles are likely to be moving at great speed, protocol exch=
anges<br>
=C2=A0 =C2=A0need to be completed in a time relatively short compared to th=
e<br>
=C2=A0 =C2=A0lifetime of a link between a vehicle and an IP-RSU, or between=
 two<br>
=C2=A0 =C2=A0vehicles.<br>
<br>
&gt;&gt;&gt; Any order of magnitude?<br>
&gt;&gt;&gt; Can you indicate whether this already rules out certain proced=
ures, e.g.<br>
DAD ?<br>
<br>
=C2=A0 =C2=A0The lifetime of a session varies depending on the session&#39;=
s type such<br>
=C2=A0 =C2=A0as a web surfing, voice call over IP, and DNS query.=C2=A0 Reg=
ardless of a<br>
=C2=A0 =C2=A0session&#39;s type, to guide all the IPv6 packets to their des=
tination<br>
=C2=A0 =C2=A0host, IP mobility should be supported for the session.<br>
<br>
&gt;&gt;&gt; this seems to be for unicast when you know who to talk to. Is =
there a need<br>
some multicast groups like anybody around interested in topic blah like I c=
ould<br>
be multicasting the speed of vehicles coming the other way that I crossed<b=
r>
recently, for use of vehicles that I=E2=80=99m crossing now, so they can se=
e a slowdown<br>
on advance<br>
<br>
=C2=A0 =C2=A0Thus, the time constraint of a wireless link has a major impac=
t on<br>
=C2=A0 =C2=A0IPv6 Neighbor Discovery (ND).=C2=A0 Mobility Management (MM) i=
s also<br>
=C2=A0 =C2=A0vulnerable to disconnections that occur before the completion =
of<br>
=C2=A0 =C2=A0identity verification and tunnel management.=C2=A0 This is esp=
ecially true<br>
=C2=A0 =C2=A0given the unreliable nature of wireless communication.=C2=A0 T=
his section<br>
=C2=A0 =C2=A0presents key topics such as neighbor discovery and mobility<br=
>
=C2=A0 =C2=A0management.<br>
<br>
&gt;&gt;&gt; Only ND? What about the MANET?<br>
&gt;&gt;&gt; how fast should ND be to be suitable?<br>
&gt;&gt;&gt; is there also a bandwidth check? You can make things much fast=
er if you<br>
dedicate a lot of spectrum to it. But that can also be a waste.<br>
<br>
5.1.=C2=A0 Neighbor Discovery<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0The requirements for IPv6 ND for vehicular networks are effici=
ent DAD<br>
=C2=A0 =C2=A0and NUD operations.<br>
<br>
&gt;&gt;&gt; Not lookup? Is it the intention to use IP unicast over MAC bro=
adcast, which<br>
is a good idea in my book?<br>
<br>
=C2=A0&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0 =C2=A0 This merging and partitioning should be considered for=
 the<br>
=C2=A0 =C2=A0IPv6 ND such as IPv6 Stateless Address Autoconfiguration (SLAA=
C)<br>
=C2=A0 =C2=A0[RFC4862].<br>
<br>
&gt;&gt;&gt; Not lookup? Is it the intention to use IP unicast over MAC bro=
adcast, which<br>
is a good idea in my book?<br>
<br>
=C2=A0&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0Also, the partitioning of a VANET may make vehicles with the s=
ame<br>
=C2=A0 =C2=A0prefix be physically unreachable.=C2=A0 Also, SLAAC needs to p=
revent IPv6<br>
=C2=A0 =C2=A0address duplication due to the merging of VANETs.=C2=A0 Accord=
ing to the<br>
=C2=A0 =C2=A0merging and partitioning, a destination vehicle (as an IPv6 ho=
st)<br>
=C2=A0 =C2=A0needs to be distinguished as either an on-link host or an off-=
link<br>
=C2=A0 =C2=A0host even though the source vehicle uses the same prefix as th=
e<br>
=C2=A0 =C2=A0destination vehicle.<br>
<br>
&gt;&gt;&gt; should reference to draft-nordmark-intarea-ippl<br>
<br>
=C2=A0 =C2=A0To efficiently prevent IPv6 address duplication due to the VAN=
ET<br>
=C2=A0 =C2=A0partitioning and merging from happening in vehicular networks,=
 the<br>
=C2=A0 =C2=A0vehicular networks need to support a vehicular-network-wide DA=
D by<br>
=C2=A0 =C2=A0defining a scope that is compatible with the legacy DAD.=C2=A0=
 In this<br>
=C2=A0 =C2=A0case, two vehicles can communicate with each other when there =
exists<br>
=C2=A0 =C2=A0a communication path over VANET or a combination of VANETs and=
 IP-<br>
=C2=A0 =C2=A0RSUs, as shown in Figure 1.=C2=A0 By using the vehicular-netwo=
rk-wide DAD,<br>
=C2=A0 =C2=A0vehicles can assure that their IPv6 addresses are unique in th=
e<br>
=C2=A0 =C2=A0vehicular network whenever they are connected to the vehicular=
<br>
=C2=A0 =C2=A0infrastructure or become disconnected from it in the form of V=
ANET.<br>
<br>
&gt;&gt;&gt; Excellent<br>
<br>
=C2=A0 =C2=A0ND time-related parameters such as router lifetime and Neighbo=
r<br>
=C2=A0 =C2=A0Advertisement (NA) interval need to be adjusted for vehicle sp=
eed and<br>
=C2=A0 =C2=A0vehicle density.=C2=A0 For example, the NA interval needs to b=
e<br>
=C2=A0 =C2=A0dynamically adjusted according to a vehicle&#39;s speed so tha=
t the<br>
=C2=A0 =C2=A0vehicle can maintain its neighboring vehicles in a stable way,=
<br>
=C2=A0 =C2=A0considering the collision probability with the NA messages sen=
t by<br>
=C2=A0 =C2=A0other vehicles.<br>
<br>
&gt;&gt;&gt; Is that a problem or just an operational setting that needs to=
 be found?<br>
&gt;&gt;&gt; Do we need to reconsider the concepts of those timers?<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0Thus, in IPv6-based vehicular networking, IPv6 ND should have =
minimum<br>
=C2=A0 =C2=A0changes for the interoperability with the legacy IPv6 ND used =
in the<br>
=C2=A0 =C2=A0Internet, including the DAD and NUD operations.<br>
<br>
&gt;&gt;&gt; I do not find the logical link with the text before, why is th=
is a =E2=80=9Cthus=E2=80=9D?<br>
&gt;&gt;&gt; why should the ND inside the VANET be constrained to be intero=
perable? This<br>
may place constraints on the solution.<br>
<br>
5.1.1.=C2=A0 Link Model<br>
<br>
=C2=A0 =C2=A0A prefix model for a vehicular network needs to facilitate the=
<br>
<br>
&gt;&gt;&gt; Do you mean a =E2=80=9Csubnet model=E2=80=9D as opposed to =E2=
=80=9Cprefix model=E2=80=9D.<br>
&gt;&gt;&gt; it would make this piece and the next should refer to<br>
draft-thubert-6man-ipv6-over-wireless for IPv6 over P2MP /NBMA, for both li=
nk<br>
and subnet issues. The general ideas are the same, but the gory details her=
e<br>
are slightly incorrect, like this notion of prefix model than comes out of =
the<br>
blue. The model is really the subnet model for the subnet associated to P2M=
P.<br>
<br>
=C2=A0 =C2=A0communication between two vehicles with the same prefix regard=
less of<br>
=C2=A0 =C2=A0the vehicular network topology as long as there exist bidirect=
ional<br>
=C2=A0 =C2=A0E2E paths between them in the vehicular network including VANE=
Ts and<br>
=C2=A0 =C2=A0IP-RSUs.=C2=A0 This prefix model allows vehicles with the same=
 prefix to<br>
=C2=A0 =C2=A0communicate with each other via a combination of multihop V2V =
and<br>
=C2=A0 =C2=A0multihop V2I with VANETs and IP-RSUs.=C2=A0 Note that the OMNI=
 interface<br>
=C2=A0 =C2=A0supports an NBMA link model where multihop V2V and V2I communi=
cations<br>
=C2=A0 =C2=A0use each mobile node&#39;s ULAs without need for any DAD or ML=
D<br>
=C2=A0 =C2=A0messaging.<br>
<br>
&gt;&gt;&gt; again overselling OMNI.<br>
&gt;&gt;&gt; I kinda agree about the OMNI interface model, nothing against =
that. But you<br>
must see that there needs a lot more than what the OMNI interface to get<br=
>
packets across V and I hops to the destination. Like routing ala MANET,<br>
redundancy handling ala DetNet because it will be very lossy, path manageme=
nt<br>
ala RAW to optimize delivery vs. spectrum=E2=80=A6 And OMNI ignores ND so i=
t does not<br>
solve the ND problems above.<br>
<br>
=C2=A0 =C2=A0IPv6 protocols work under certain assumptions that do not nece=
ssarily<br>
=C2=A0 =C2=A0hold for vehicular wireless access link types other than OMNI/=
NBMA<br>
=C2=A0 =C2=A0[VIP-WAVE][RFC5889]; the rest of this section discusses implic=
ations<br>
=C2=A0 =C2=A0for those link types that do not apply when the OMNI/NBMA link=
 model<br>
<br>
&gt;&gt;&gt; again overselling OMNI.<br>
&gt;&gt;&gt; The keyword here is P2MP / NBMA, and OMNI is one interface tha=
t accepts<br>
that. There are others. IBM=E2=80=99s IPv4 over Frame relay was already P2M=
P / NBMA,<br>
using routing to complete the partial mesh in P2MP. The text seems to imply=
<br>
that OMNI is the only way to do that and that=E2=80=99s wrong. Also OMNI is=
 loaded with<br>
other stuff than a plain P2MP capable interface. And ND over P2MP is not do=
ne<br>
by OMNI, OMNI only makes classical ND worse and only works in a full mesh. =
OTOH<br>
RFC 8505, which is designed to do ND for P2MP /NBMA would indeed work very =
well<br>
within an OMNI interface and solve those problems. &gt;&gt;&gt; My point is=
 that you<br>
need to tell the full story or refrain from entering solution space in this=
 doc<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0There is a relationship between a link and a prefix, besides t=
he<br>
=C2=A0 =C2=A0different scopes that are expected from the link-local and glo=
bal<br>
=C2=A0 =C2=A0types of IPv6 addresses.=C2=A0 In an IPv6 link, it is assumed =
that all<br>
=C2=A0 =C2=A0interfaces which are configured with the same subnet prefix an=
d with<br>
=C2=A0 =C2=A0on-link bit set can communicate with each other on an IPv6 lin=
k.<br>
<br>
&gt;&gt;&gt; not assumed; that=E2=80=99s what the onlink but set tells. The=
 conclusion should be<br>
that the VANET cannot set the O bit.<br>
<br>
=C2=A0 =C2=A0However, the vehicular link model needs to define the relation=
ship<br>
=C2=A0 =C2=A0between a link and a prefix, considering the dynamics of wirel=
ess<br>
=C2=A0 =C2=A0links and the characteristics of VANET.<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0From the previous observation, a vehicular link model should c=
onsider<br>
=C2=A0 =C2=A0the frequent partitioning and merging of VANETs due to vehicle=
<br>
=C2=A0 =C2=A0mobility.=C2=A0 Therefore, the vehicular link model needs to u=
se an on-<br>
=C2=A0 =C2=A0link prefix and off-link prefix according to the network topol=
ogy of<br>
=C2=A0 =C2=A0vehicles such as a one-hop reachable network and a multihop re=
achable<br>
<br>
&gt;&gt;&gt; No, the once a node saw a O bit set that sticks even if it see=
s other<br>
advertisements of the PIO with the O bit not set. &gt;&gt;&gt; This is a gl=
obal and<br>
intrinsic property of the prefix (and an attack vector that could be mentio=
ned<br>
in the sec section). &gt;&gt;&gt; the VANET prefix must never come with the=
 O bit set.<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0network (or partitioned networks).=C2=A0 If the vehicles with =
the same<br>
=C2=A0 =C2=A0prefix are reachable from each other in one hop, the prefix sh=
ould be<br>
=C2=A0 =C2=A0on-link.<br>
<br>
&gt;&gt;&gt;&gt; No, see above; but the router may redirect though it is re=
ally risky<br>
unless this is a stable situation like a parking place.<br>
<br>
=C2=A0 =C2=A0Thus, in IPv6-based vehicular networking, the vehicular link m=
odel<br>
=C2=A0 =C2=A0should have minimum changes for interoperability with standard=
 IPv6<br>
=C2=A0 =C2=A0links in an efficient fashion to support IPv6 DAD, MLD and NUD=
<br>
=C2=A0 =C2=A0operations.=C2=A0 When the OMNI NBMA link model is used, there=
 are no link<br>
=C2=A0 =C2=A0model changes nor DAD/MLD messaging required.<br>
<br>
&gt;&gt;&gt;&gt; again overselling OMNI.<br>
&gt;&gt;&gt;&gt; You need a good P2MP subnet model with routing support whe=
n the mesh is<br>
partial. My company alone has been shipping million of nodes that build sub=
nets<br>
of thousands, and that was done using IETF standards.<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0For vehicular networks with high mobility and density, the DAD=
 needs<br>
=C2=A0 =C2=A0to be performed efficiently with minimum overhead so that the<=
br>
=C2=A0 =C2=A0vehicles can exchange a driving safety message (e.g., collisio=
n<br>
=C2=A0 =C2=A0avoidance and accident notification) with each other with a sh=
ort<br>
=C2=A0 =C2=A0interval (e.g., 0.5 second) by a technical report from NHTSA<b=
r>
=C2=A0 =C2=A0(National Highway Traffic Safety Administration) [NHTSA-ACAS-R=
eport].<br>
=C2=A0 =C2=A0Such a driving safety message may include a vehicle&#39;s mobi=
lity<br>
=C2=A0 =C2=A0information (i.e., position, speed, direction, and acceleratio=
n/<br>
=C2=A0 =C2=A0deceleration).=C2=A0 The exchange interval of this message is =
0.5 second,<br>
=C2=A0 =C2=A0which is required to allow a driver to avoid a rear-end crash =
from<br>
=C2=A0 =C2=A0another vehicle.<br>
<br>
&gt;&gt;&gt; IPv6 over broadcast MAC (used to be called internet 0, 10+ yea=
rs ago)<br>
solves that MAC issue since there is no MAC.<br>
<br>
5.1.3.=C2=A0 Routing<br>
<br>
=C2=A0 =C2=A0For multihop V2V communications in either a VANET or VANETs vi=
a IP-<br>
=C2=A0 =C2=A0RSUs, a vehicular Mobile Ad Hoc Networks (MANET) routing proto=
col may<br>
=C2=A0 =C2=A0be required to support both unicast and multicast in the links=
 of the<br>
=C2=A0 =C2=A0subnet with the same IPv6 prefix.=C2=A0 However, it will be co=
stly to run<br>
=C2=A0 =C2=A0both vehicular ND and a vehicular ad hoc routing protocol in t=
erms of<br>
=C2=A0 =C2=A0control traffic overhead [ID-Multicast-Problems].<br>
<br>
&gt;&gt;&gt; we do that with IETF standards on battery operated devices alr=
eady. Using<br>
RFC 8505 for the UNI and RPL for the NNI. It is scalable (we=E2=80=99ve see=
n 30 hops in<br>
meshes of thousands in the real world though it=E2=80=99s not the normal op=
erational<br>
model, but can happen to maintain connectivity during the reboot of a root)=
 and<br>
does not use broadcast. RPL was initially designed as a V2V2V protocol but<=
br>
found its market on the IoT. I=E2=80=99m sure the protocol would gladly com=
e back to<br>
its roots.<br>
<br>
=C2=A0 =C2=A0A routing protocol for a VANET may cause redundant wireless fr=
ames in<br>
=C2=A0 =C2=A0the air to check the neighborhood of each vehicle and compute =
the<br>
=C2=A0 =C2=A0routing information in a VANET with a dynamic network topology=
<br>
=C2=A0 =C2=A0because the IPv6 ND is used to check the neighborhood of each<=
br>
=C2=A0 =C2=A0vehicle.=C2=A0 Thus, the vehicular routing needs to take advan=
tage of the<br>
=C2=A0 =C2=A0IPv6 ND to minimize its control overhead.<br>
<br>
&gt;&gt;&gt; A clean description of the interaction of RPL and RFC 8505 in =
our IoT<br>
networks. Note that the speed of the PHY in VANET balanced the instability =
of<br>
the topology, and RPL still applies. Note also that RPL uses DV with a rout=
ing<br>
stretch in order to minimize the topology awareness that=E2=80=99s needed i=
n each node,<br>
which results in minimal signaling.<br>
<br>
5.2.=C2=A0 Mobility Management<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0For a mobility management scheme in a shared link, where the w=
ireless<br>
=C2=A0 =C2=A0subnets of multiple IP-RSUs share the same prefix, an efficien=
t<br>
=C2=A0 =C2=A0vehicular-network-wide DAD is required.=C2=A0 If DHCPv6 is use=
d to assign<br>
=C2=A0 =C2=A0a unique IPv6 address to each vehicle in this shared link,<br>
<br>
&gt;&gt;&gt; I would not use the term link, or shared. Maybe shared link -&=
gt; domain?<br>
&lt;snip&gt;<br>
<br>
the DAD is<br>
=C2=A0 =C2=A0not required.=C2=A0 On the other hand, for a mobility manageme=
nt scheme<br>
=C2=A0 =C2=A0with a unique prefix per mobile node (e.g., PMIPv6 [RFC5213] a=
nd OMNI<br>
=C2=A0 =C2=A0[OMNI]), DAD is not required because the IPv6 address of a veh=
icle&#39;s<br>
=C2=A0 =C2=A0external wireless interface is guaranteed to be unique.<br>
<br>
&gt;&gt;&gt; again overselling OMNI<br>
&gt;&gt;&gt; As I said earlier, this is wring there are (64*) more chances =
of a<br>
collision in OMNI prefixes than in IPv6 IIDs. &gt;&gt;&gt; OMNI prefixes ca=
n collision,<br>
home addresses that are unique on a home network cannot. &gt;&gt;&gt; Now i=
f both the<br>
OMNI prefix and the IID are good randoms, then obviously, the chances of<br=
>
collisions round up to 0. &gt;&gt;&gt; Collision is certainly not my worst =
fear.<br>
<br>
=C2=A0 There is a<br>
=C2=A0 =C2=A0tradeoff between the prefix usage efficiency and DAD overhead.=
=C2=A0 Thus,<br>
=C2=A0 =C2=A0the IPv6 address autoconfiguration for vehicular networks need=
s to<br>
=C2=A0 =C2=A0consider this tradeoff to support efficient mobility managemen=
t.<br>
<br>
&gt;&gt;&gt; This is way too superficial and hides the reality of things.<b=
r>
- Using a VANET Infra prefix allows direct routability to the internet whic=
h<br>
BYOA does not since the BYOA is not topologically correct. Yes, it costs a =
DAD<br>
with classic ND, but it does not with RCF8505 and the draft fails to mentio=
n<br>
that. - A BYOA needs a tunnel home, and the node needs to know who is reach=
able<br>
inside the VANET and what is not to decide to tunnel or not; this is a<br>
difficult problem (vs. control place overhead) that is not discussed here.<=
br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0For the case of a multihomed network, a vehicle can follow the=
 first-<br>
=C2=A0 =C2=A0hop router selection rule described in [RFC8028].=C2=A0 That i=
s, the<br>
=C2=A0 =C2=A0vehicle should select its default router for each prefix by<br=
>
=C2=A0 =C2=A0preferring the router that advertised the prefix.<br>
<br>
&gt;&gt;&gt; Still router discovery (in and out) must be very fast. Thing o=
f the RA<br>
intervale in MIPv6. Is that sufficient? Too expensive?<br>
<br>
&lt;snip&gt;<br>
<br>
6.=C2=A0 Security Considerations<br>
&gt;&gt;&gt; Any discussion on the security of classical ND and other opera=
tional issues<br>
(rfc6583) ?<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0Security and privacy are paramount in V2I, V2V, and V2X networ=
king.<br>
=C2=A0 =C2=A0Vehicles and infrastructure must be authenticated in order to<=
br>
=C2=A0 =C2=A0participate in vehicular networking.=C2=A0 Also, in-vehicle de=
vices (e.g.,<br>
=C2=A0 =C2=A0ECU) and a driver/passenger&#39;s mobile devices (e.g., smartp=
hone and<br>
=C2=A0 =C2=A0tablet PC) in a vehicle need to communicate with other in-vehi=
cle<br>
=C2=A0 =C2=A0devices and another driver/passenger&#39;s mobile devices in a=
nother<br>
=C2=A0 =C2=A0vehicle, or other servers behind an IP-RSU in a secure way.=C2=
=A0 Even<br>
=C2=A0 =C2=A0though a vehicle is perfectly authenticated and legitimate, it=
 may be<br>
=C2=A0 =C2=A0hacked for running malicious applications to track and collect=
 its<br>
=C2=A0 =C2=A0and other vehicles&#39; information.=C2=A0 In this case, an at=
tack mitigation<br>
=C2=A0 =C2=A0process may be required to reduce the aftermath of malicious<b=
r>
=C2=A0 =C2=A0behaviors.<br>
<br>
&gt;&gt;&gt; The section should mention that both with classical ND and BYO=
A, addresses<br>
can be impersonated, and RFC 8928 protects against that in both cases while=
<br>
maintaining privacy.<br>
<br>
=C2=A0 =C2=A0Even though vehicles can be authenticated with valid certifica=
tes by<br>
=C2=A0 =C2=A0an authentication server in the vehicular cloud, the authentic=
ated<br>
<br>
&gt;&gt;&gt; Is PKI feasible (deploying it in every car?). Is it fast enoug=
h? Is it<br>
really what IPWAVE thinks vehicle should use????? &gt;&gt;&gt; e.g. why wou=
ld one need<br>
to authenticate to a V2I network? &gt;&gt;&gt; from the text earlier in the=
 doc, it<br>
seemed that what you really want is access that is fast to join, capable of=
<br>
offering the reachability you want, anonymous, and innocuous (cars can not =
harm<br>
one another).<br>
<br>
=C2=A0 =C2=A0vehicles may harm other vehicles, so their communication activ=
ities<br>
=C2=A0 =C2=A0need to be logged in either a central way through a logging se=
rver<br>
=C2=A0 =C2=A0(e.g., TCC) in the vehicular cloud or a distributed way (e.g.,=
<br>
=C2=A0 =C2=A0blockchain [Bitcoin]) along with other vehicles or infrastruct=
ure.<br>
=C2=A0 =C2=A0For the non-repudiation of the harmful activities of malicious=
 nodes,<br>
=C2=A0 =C2=A0a blockchain technology can be used [Bitcoin].=C2=A0 Each mess=
age from a<br>
=C2=A0 =C2=A0vehicle can be treated as a transaction and the neighboring ve=
hicles<br>
=C2=A0 =C2=A0can play the role of peers in a consensus method of a blockcha=
in<br>
=C2=A0 =C2=A0[Bitcoin][Vehicular-BlockChain].=C2=A0 For a blockchain&#39;s =
efficient<br>
=C2=A0 =C2=A0consensus in vehicular networks having fast moving vehicles, a=
 new<br>
=C2=A0 =C2=A0consensus algorithm needs to be developed or an existing conse=
nsus<br>
=C2=A0 =C2=A0algorithm needs to be enhanced.<br>
<br>
&gt;&gt;&gt; solution space; better express the=C2=A0 security needs since =
this is a PS.<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0To identify malicious vehicles among vehicles, an authenticati=
on<br>
=C2=A0 =C2=A0method is required.<br>
<br>
&gt;&gt;&gt; No. As said earlier a vehicle can be infected. You need innocu=
ousness.which<br>
can come from things like isolation, zerotrust, and protocols that are<br>
difficult to hack around. Classical IPv6 ND is open bar. RFC 8505/8928 is<b=
r>
protected by construction, anonymous, and fast.<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0 =C2=A0For the setup of a secure channel over IPsec or TLS, the multi=
hop V2I<br>
=C2=A0 =C2=A0communications over DSRC is required in a highway for the<br>
=C2=A0 =C2=A0authentication by involving multiple intermediate vehicles as =
relay<br>
=C2=A0 =C2=A0nodes toward an IP-RSU connected to an authentication server i=
n the<br>
=C2=A0 =C2=A0vehicular cloud.=C2=A0 The V2I communications over 5G V2X (or =
LTE V2X) is<br>
=C2=A0 =C2=A0required to allow a vehicle to communicate directly with a gNo=
deB (or<br>
=C2=A0 =C2=A0eNodeB) connected to an authentication server in the vehicular=
 cloud.<br>
<br>
&gt;&gt;&gt; solution space. Instead, you could mention that setting up sec=
ured channels<br>
between cars that cross one another might not complete in time to establish=
 the<br>
communication channel, and that the innocuousness must come from zerotrust =
in<br>
the transactions between the cars.<br>
=C2=A0 =C2=A0For the IPv6 ND, the DAD is required to ensure the uniqueness =
of the<br>
=C2=A0 =C2=A0IPv6 address of a vehicle&#39;s wireless interface.<br>
<br>
&gt;&gt;&gt; for classical ND (SLAAC) that=E2=80=99s true. That is not with=
 RFC 8505, since the<br>
infra maintains a table of all addresses in use in the prefix and blocks<br=
>
duplicates without the RFC 4862 DAD method. The stateful autoconf address g=
rant<br>
is immediate.<br>
<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0This DAD can be used<br>
=C2=A0 =C2=A0as a flooding attack that uses the DAD-related ND packets<br>
=C2=A0 =C2=A0disseminated over the VANET or vehicular networks.<br>
<br>
&gt;&gt;&gt; also for DOS attacks. You can block a owner from using an addr=
ess. A<br>
reference to rfc6959 is much needed here.<br>
<br>
&lt;snip&gt;<br>
<br>
=C2=A0This possibility<br>
=C2=A0 =C2=A0indicates that the vehicles and IP-RSUs need to filter out sus=
picious<br>
=C2=A0 =C2=A0ND traffic in advance.=C2=A0 Based on the SEND [RFC3971] mecha=
nism, the<br>
=C2=A0 =C2=A0authentication for routers (i.e., IP-RSUs) can be conducted by=
 only<br>
=C2=A0 =C2=A0selecting an IP-RSU that has a certification path toward trust=
ed<br>
=C2=A0 =C2=A0parties.=C2=A0 For authenticating other vehicles, the cryptogr=
aphically<br>
=C2=A0 =C2=A0generated address (CGA) can be used to verify the true owner o=
f a<br>
=C2=A0 =C2=A0received ND message, which requires to use the CGA ND option i=
n the<br>
=C2=A0 =C2=A0ND protocols.=C2=A0 For a general protection of the ND mechani=
sm, the RSA<br>
=C2=A0 =C2=A0Signature ND option can also be used to protect the integrity =
of the<br>
=C2=A0 =C2=A0messages by public key signatures.=C2=A0 For a more advanced<b=
r>
=C2=A0 =C2=A0authentication mechanism, a distributed blockchain-based mecha=
nism<br>
=C2=A0 =C2=A0[Vehicular-BlockChain] can be used.<br>
<br>
&gt;&gt;&gt; solution space. Again, the draft should focus on problems and =
needs. The<br>
problem here is that SEND is complex, and not implemented in the major stac=
k.<br>
It relies on PKI for trusting the router. The V2I need is a zerotrust model=
<br>
where one V, the other local Vs, and the I, can help each other anonymously=
 and<br>
harmlessly. &lt;snip&gt;<br>
<br>
8.=C2=A0 Informative References<br>
<br>
&gt;&gt;&gt; no normative reference?<br>
<br>
&gt;&gt;&gt; no normative reference?<br>
<br>
&lt;snip&gt;<br>
<br>
Voila!<br>
<br>
Keep safe;<br>
<br>
Pascal<br>
<br>
<br>
<br>
</blockquote></div>

--0000000000008f7dfc05d7678502--


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From nobody Sun Feb 13 23:16:17 2022
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Subject: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-25.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IP Wireless Access in Vehicular Environments WG of the IETF.

        Title           : IPv6 Wireless Access in Vehicular Environments (IPWAVE): Problem Statement and Use Cases
        Author          : Jaehoon (Paul) Jeong (editor)
	Filename        : draft-ietf-ipwave-vehicular-networking-25.txt
	Pages           : 49
	Date            : 2022-02-13

Abstract:
   This document discusses the problem statement and use cases of
   IPv6-based vehicular networking for Intelligent Transportation
   Systems (ITS).  The main scenarios of vehicular communications are
   vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and
   vehicle-to-everything (V2X) communications.  First, this document
   explains use cases using V2V, V2I, and V2X networking.  Next, for
   IPv6-based vehicular networks, it makes a gap analysis of current
   IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mobility Management,
   and Security & Privacy), and then enumerates requirements for the
   extensions of those IPv6 protocols for IPv6-based vehicular
   networking.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-ipwave-vehicular-networking/

There is also an htmlized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-networking-25

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-ipwave-vehicular-networking-25


Internet-Drafts are also available by rsync at rsync.ietf.org::internet-drafts



From nobody Sun Feb 20 21:00:00 2022
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IP Wireless Access in Vehicular Environments WG of the IETF.

        Title           : IPv6 Wireless Access in Vehicular Environments (IPWAVE): Problem Statement and Use Cases
        Author          : Jaehoon (Paul) Jeong
	Filename        : draft-ietf-ipwave-vehicular-networking-26.txt
	Pages           : 49
	Date            : 2022-02-20

Abstract:
   This document discusses the problem statement and use cases of
   IPv6-based vehicular networking for Intelligent Transportation
   Systems (ITS).  The main scenarios of vehicular communications are
   vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and
   vehicle-to-everything (V2X) communications.  First, this document
   explains use cases using V2V, V2I, and V2X networking.  Next, for
   IPv6-based vehicular networks, it makes a gap analysis of current
   IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mobility Management,
   and Security & Privacy), and then enumerates requirements for the
   extensions of those IPv6 protocols for IPv6-based vehicular
   networking.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-ipwave-vehicular-networking/

There is also an htmlized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-networking-26

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-ipwave-vehicular-networking-26


Internet-Drafts are also available by rsync at rsync.ietf.org::internet-drafts



From nobody Mon Feb 21 07:28:20 2022
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Hi, it looks like a lot of what was in the draft regarding AERO/OMNI has be=
en cut out
so that means I am going to have to re-review it. I will get to this a soon=
 as possible;
hopefully in the next couple of days.

Fred

> -----Original Message-----
> From: its [mailto:its-bounces@ietf.org] On Behalf Of internet-drafts@ietf=
.org
> Sent: Sunday, February 20, 2022 9:00 PM
> To: i-d-announce@ietf.org
> Cc: its@ietf.org
> Subject: [EXTERNAL] [ipwave] I-D Action: draft-ietf-ipwave-vehicular-netw=
orking-26.txt
>=20
> EXT email: be mindful of links/attachments.
>=20
>=20
>=20
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts direct=
ories.
> This draft is a work item of the IP Wireless Access in Vehicular Environm=
ents WG of the IETF.
>=20
>         Title           : IPv6 Wireless Access in Vehicular Environments =
(IPWAVE): Problem Statement and Use Cases
>         Author          : Jaehoon (Paul) Jeong
> 	Filename        : draft-ietf-ipwave-vehicular-networking-26.txt
> 	Pages           : 49
> 	Date            : 2022-02-20
>=20
> Abstract:
>    This document discusses the problem statement and use cases of
>    IPv6-based vehicular networking for Intelligent Transportation
>    Systems (ITS).  The main scenarios of vehicular communications are
>    vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and
>    vehicle-to-everything (V2X) communications.  First, this document
>    explains use cases using V2V, V2I, and V2X networking.  Next, for
>    IPv6-based vehicular networks, it makes a gap analysis of current
>    IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mobility Management,
>    and Security & Privacy), and then enumerates requirements for the
>    extensions of those IPv6 protocols for IPv6-based vehicular
>    networking.
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-ipwave-vehicular-networking/
>=20
> There is also an htmlized version available at:
> https://datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-network=
ing-26
>=20
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwave-vehicular-networkin=
g-26
>=20
>=20
> Internet-Drafts are also available by rsync at rsync.ietf.org::internet-d=
rafts
>=20
>=20
> _______________________________________________
> its mailing list
> its@ietf.org
> https://www.ietf.org/mailman/listinfo/its


From nobody Mon Feb 21 11:56:28 2022
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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: "its@ietf.org" <its@ietf.org>, "i-d-announce@ietf.org" <i-d-announce@ietf.org>
Thread-Topic: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Hi, I started reviewing this and found that it has been completely overhaul=
ed since I put my
comments in many months ago. It has in fact been completely rewritten to fa=
vor the shared
IPv6 multilink subnet model over multihop networks, to favor RPL/6LowPan ov=
er standard
MANET routing protocols, to favor IPv6 ND changes over standard IPv6 ND, an=
d to favor
multilink DAD. None of that is necessary with AERO/OMNI and the NBMA-based =
virtual link
created by the OMNI Adaptation. So, I stopped midway through marking up the=
 document
with my comments because it has taken a complete left turn and started down=
 a wrong path.

What is mainly at the heart of the divergence is that the document now embr=
aces the
multilink IPv6 subnet model vs the AERO/OMNI NBMA link model that was there=
 the last
time I looked. But, there is no need for such complication when there is a =
much simpler
alternative at hand. I notice also that in the appendices the AERO/OMNI "6M=
's of Mobile
Internetworking" was removed - at the very least that needs to be restored.

In its current form, this document has been diverted to go down the wrong p=
ath. It
needs to be either re-balanced or re-written.

Thanks - Fred

> -----Original Message-----
> From: its [mailto:its-bounces@ietf.org] On Behalf Of Templin (US), Fred L
> Sent: Monday, February 21, 2022 7:28 AM
> To: its@ietf.org; i-d-announce@ietf.org
> Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-=
26.txt
>=20
> Hi, it looks like a lot of what was in the draft regarding AERO/OMNI has =
been cut out
> so that means I am going to have to re-review it. I will get to this a so=
on as possible;
> hopefully in the next couple of days.
>=20
> Fred
>=20
> > -----Original Message-----
> > From: its [mailto:its-bounces@ietf.org] On Behalf Of internet-drafts@ie=
tf.org
> > Sent: Sunday, February 20, 2022 9:00 PM
> > To: i-d-announce@ietf.org
> > Cc: its@ietf.org
> > Subject: [EXTERNAL] [ipwave] I-D Action: draft-ietf-ipwave-vehicular-ne=
tworking-26.txt
> >
> > EXT email: be mindful of links/attachments.
> >
> >
> >
> >
> > A New Internet-Draft is available from the on-line Internet-Drafts dire=
ctories.
> > This draft is a work item of the IP Wireless Access in Vehicular Enviro=
nments WG of the IETF.
> >
> >         Title           : IPv6 Wireless Access in Vehicular Environment=
s (IPWAVE): Problem Statement and Use Cases
> >         Author          : Jaehoon (Paul) Jeong
> > 	Filename        : draft-ietf-ipwave-vehicular-networking-26.txt
> > 	Pages           : 49
> > 	Date            : 2022-02-20
> >
> > Abstract:
> >    This document discusses the problem statement and use cases of
> >    IPv6-based vehicular networking for Intelligent Transportation
> >    Systems (ITS).  The main scenarios of vehicular communications are
> >    vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and
> >    vehicle-to-everything (V2X) communications.  First, this document
> >    explains use cases using V2V, V2I, and V2X networking.  Next, for
> >    IPv6-based vehicular networks, it makes a gap analysis of current
> >    IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mobility Management,
> >    and Security & Privacy), and then enumerates requirements for the
> >    extensions of those IPv6 protocols for IPv6-based vehicular
> >    networking.
> >
> >
> > The IETF datatracker status page for this draft is:
> > https://datatracker.ietf.org/doc/draft-ietf-ipwave-vehicular-networking=
/
> >
> > There is also an htmlized version available at:
> > https://datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-netwo=
rking-26
> >
> > A diff from the previous version is available at:
> > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwave-vehicular-network=
ing-26
> >
> >
> > Internet-Drafts are also available by rsync at rsync.ietf.org::internet=
-drafts
> >
> >
> > _______________________________________________
> > its mailing list
> > its@ietf.org
> > https://www.ietf.org/mailman/listinfo/its
>=20
> _______________________________________________
> its mailing list
> its@ietf.org
> https://www.ietf.org/mailman/listinfo/its


From nobody Mon Feb 21 12:26:56 2022
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From: Russ Housley <housley@vigilsec.com>
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To: "Mr. Jaehoon Paul Jeong" <jaehoon.paul@gmail.com>, "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Paul and Fred:

I think the update is more aligned with the documents that are advancing =
one the IETF stream.  That said, I would not be apposed to the inclusion =
of the 6M's, but not in a way that claims that there is only one =
approach way to address these things.  What do you think about that was =
a way forward?

Russ


> On Feb 21, 2022, at 2:56 PM, Templin (US), Fred L =
<Fred.L.Templin@boeing.com> wrote:
>=20
> Hi, I started reviewing this and found that it has been completely =
overhauled since I put my
> comments in many months ago. It has in fact been completely rewritten =
to favor the shared
> IPv6 multilink subnet model over multihop networks, to favor =
RPL/6LowPan over standard
> MANET routing protocols, to favor IPv6 ND changes over standard IPv6 =
ND, and to favor
> multilink DAD. None of that is necessary with AERO/OMNI and the =
NBMA-based virtual link
> created by the OMNI Adaptation. So, I stopped midway through marking =
up the document
> with my comments because it has taken a complete left turn and started =
down a wrong path.
>=20
> What is mainly at the heart of the divergence is that the document now =
embraces the
> multilink IPv6 subnet model vs the AERO/OMNI NBMA link model that was =
there the last
> time I looked. But, there is no need for such complication when there =
is a much simpler
> alternative at hand. I notice also that in the appendices the =
AERO/OMNI "6M's of Mobile
> Internetworking" was removed - at the very least that needs to be =
restored.
>=20
> In its current form, this document has been diverted to go down the =
wrong path. It
> needs to be either re-balanced or re-written.
>=20
> Thanks - Fred
>=20
>> -----Original Message-----
>> From: its [mailto:its-bounces@ietf.org] On Behalf Of Templin (US), =
Fred L
>> Sent: Monday, February 21, 2022 7:28 AM
>> To: its@ietf.org; i-d-announce@ietf.org
>> Subject: Re: [ipwave] I-D Action: =
draft-ietf-ipwave-vehicular-networking-26.txt
>>=20
>> Hi, it looks like a lot of what was in the draft regarding AERO/OMNI =
has been cut out
>> so that means I am going to have to re-review it. I will get to this =
a soon as possible;
>> hopefully in the next couple of days.
>>=20
>> Fred
>>=20
>>> -----Original Message-----
>>> From: its [mailto:its-bounces@ietf.org] On Behalf Of =
internet-drafts@ietf.org
>>> Sent: Sunday, February 20, 2022 9:00 PM
>>> To: i-d-announce@ietf.org
>>> Cc: its@ietf.org
>>> Subject: [EXTERNAL] [ipwave] I-D Action: =
draft-ietf-ipwave-vehicular-networking-26.txt
>>>=20
>>> EXT email: be mindful of links/attachments.
>>>=20
>>>=20
>>>=20
>>>=20
>>> A New Internet-Draft is available from the on-line Internet-Drafts =
directories.
>>> This draft is a work item of the IP Wireless Access in Vehicular =
Environments WG of the IETF.
>>>=20
>>>        Title           : IPv6 Wireless Access in Vehicular =
Environments (IPWAVE): Problem Statement and Use Cases
>>>        Author          : Jaehoon (Paul) Jeong
>>> 	Filename        : draft-ietf-ipwave-vehicular-networking-26.txt
>>> 	Pages           : 49
>>> 	Date            : 2022-02-20
>>>=20
>>> Abstract:
>>>   This document discusses the problem statement and use cases of
>>>   IPv6-based vehicular networking for Intelligent Transportation
>>>   Systems (ITS).  The main scenarios of vehicular communications are
>>>   vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and
>>>   vehicle-to-everything (V2X) communications.  First, this document
>>>   explains use cases using V2V, V2I, and V2X networking.  Next, for
>>>   IPv6-based vehicular networks, it makes a gap analysis of current
>>>   IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mobility =
Management,
>>>   and Security & Privacy), and then enumerates requirements for the
>>>   extensions of those IPv6 protocols for IPv6-based vehicular
>>>   networking.
>>>=20
>>>=20
>>> The IETF datatracker status page for this draft is:
>>> =
https://datatracker.ietf.org/doc/draft-ietf-ipwave-vehicular-networking/
>>>=20
>>> There is also an htmlized version available at:
>>> =
https://datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-networki=
ng-26
>>>=20
>>> A diff from the previous version is available at:
>>> =
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwave-vehicular-networking=
-26
>>>=20
>>>=20
>>> Internet-Drafts are also available by rsync at =
rsync.ietf.org::internet-drafts
>>>=20
>>>=20
>>> _______________________________________________
>>> its mailing list
>>> its@ietf.org
>>> https://www.ietf.org/mailman/listinfo/its
>>=20
>> _______________________________________________
>> its mailing list
>> its@ietf.org
>> https://www.ietf.org/mailman/listinfo/its
>=20
> _______________________________________________
> its mailing list
> its@ietf.org
> https://www.ietf.org/mailman/listinfo/its


From nobody Mon Feb 21 12:52:49 2022
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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: Russ Housley <housley@vigilsec.com>, "Mr. Jaehoon Paul Jeong" <jaehoon.paul@gmail.com>
CC: "its@ietf.org" <its@ietf.org>
Thread-Topic: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Date: Mon, 21 Feb 2022 20:52:26 +0000
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Russ, it seems that we have two competing world views - the multilink subne=
t model
and the NBMA link model - and I could agree to a document that does its bes=
t to balance
the two alternatives. But, what the document has now is heavily weighted in=
 one direction.
I think what needs to happen is to have the document brought back into bala=
nce.

Fred

> -----Original Message-----
> From: Russ Housley [mailto:housley@vigilsec.com]
> Sent: Monday, February 21, 2022 12:27 PM
> To: Mr. Jaehoon Paul Jeong <jaehoon.paul@gmail.com>; Templin (US), Fred L=
 <Fred.L.Templin@boeing.com>
> Cc: its@ietf.org
> Subject: [EXTERNAL] Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-=
networking-26.txt
>=20
> EXT email: be mindful of links/attachments.
>=20
>=20
>=20
> Paul and Fred:
>=20
> I think the update is more aligned with the documents that are advancing =
one the IETF stream.  That said, I would not be apposed to the
> inclusion of the 6M's, but not in a way that claims that there is only on=
e approach way to address these things.  What do you think about
> that was a way forward?
>=20
> Russ
>=20
>=20
> > On Feb 21, 2022, at 2:56 PM, Templin (US), Fred L <Fred.L.Templin@boein=
g.com> wrote:
> >
> > Hi, I started reviewing this and found that it has been completely over=
hauled since I put my
> > comments in many months ago. It has in fact been completely rewritten t=
o favor the shared
> > IPv6 multilink subnet model over multihop networks, to favor RPL/6LowPa=
n over standard
> > MANET routing protocols, to favor IPv6 ND changes over standard IPv6 ND=
, and to favor
> > multilink DAD. None of that is necessary with AERO/OMNI and the NBMA-ba=
sed virtual link
> > created by the OMNI Adaptation. So, I stopped midway through marking up=
 the document
> > with my comments because it has taken a complete left turn and started =
down a wrong path.
> >
> > What is mainly at the heart of the divergence is that the document now =
embraces the
> > multilink IPv6 subnet model vs the AERO/OMNI NBMA link model that was t=
here the last
> > time I looked. But, there is no need for such complication when there i=
s a much simpler
> > alternative at hand. I notice also that in the appendices the AERO/OMNI=
 "6M's of Mobile
> > Internetworking" was removed - at the very least that needs to be resto=
red.
> >
> > In its current form, this document has been diverted to go down the wro=
ng path. It
> > needs to be either re-balanced or re-written.
> >
> > Thanks - Fred
> >
> >> -----Original Message-----
> >> From: its [mailto:its-bounces@ietf.org] On Behalf Of Templin (US), Fre=
d L
> >> Sent: Monday, February 21, 2022 7:28 AM
> >> To: its@ietf.org; i-d-announce@ietf.org
> >> Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networki=
ng-26.txt
> >>
> >> Hi, it looks like a lot of what was in the draft regarding AERO/OMNI h=
as been cut out
> >> so that means I am going to have to re-review it. I will get to this a=
 soon as possible;
> >> hopefully in the next couple of days.
> >>
> >> Fred
> >>
> >>> -----Original Message-----
> >>> From: its [mailto:its-bounces@ietf.org] On Behalf Of internet-drafts@=
ietf.org
> >>> Sent: Sunday, February 20, 2022 9:00 PM
> >>> To: i-d-announce@ietf.org
> >>> Cc: its@ietf.org
> >>> Subject: [EXTERNAL] [ipwave] I-D Action: draft-ietf-ipwave-vehicular-=
networking-26.txt
> >>>
> >>> EXT email: be mindful of links/attachments.
> >>>
> >>>
> >>>
> >>>
> >>> A New Internet-Draft is available from the on-line Internet-Drafts di=
rectories.
> >>> This draft is a work item of the IP Wireless Access in Vehicular Envi=
ronments WG of the IETF.
> >>>
> >>>        Title           : IPv6 Wireless Access in Vehicular Environmen=
ts (IPWAVE): Problem Statement and Use Cases
> >>>        Author          : Jaehoon (Paul) Jeong
> >>> 	Filename        : draft-ietf-ipwave-vehicular-networking-26.txt
> >>> 	Pages           : 49
> >>> 	Date            : 2022-02-20
> >>>
> >>> Abstract:
> >>>   This document discusses the problem statement and use cases of
> >>>   IPv6-based vehicular networking for Intelligent Transportation
> >>>   Systems (ITS).  The main scenarios of vehicular communications are
> >>>   vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and
> >>>   vehicle-to-everything (V2X) communications.  First, this document
> >>>   explains use cases using V2V, V2I, and V2X networking.  Next, for
> >>>   IPv6-based vehicular networks, it makes a gap analysis of current
> >>>   IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mobility Management,
> >>>   and Security & Privacy), and then enumerates requirements for the
> >>>   extensions of those IPv6 protocols for IPv6-based vehicular
> >>>   networking.
> >>>
> >>>
> >>> The IETF datatracker status page for this draft is:
> >>> https://datatracker.ietf.org/doc/draft-ietf-ipwave-vehicular-networki=
ng/
> >>>
> >>> There is also an htmlized version available at:
> >>> https://datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-net=
working-26
> >>>
> >>> A diff from the previous version is available at:
> >>> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwave-vehicular-netwo=
rking-26
> >>>
> >>>
> >>> Internet-Drafts are also available by rsync at rsync.ietf.org::intern=
et-drafts
> >>>
> >>>
> >>> _______________________________________________
> >>> its mailing list
> >>> its@ietf.org
> >>> https://www.ietf.org/mailman/listinfo/its
> >>
> >> _______________________________________________
> >> its mailing list
> >> its@ietf.org
> >> https://www.ietf.org/mailman/listinfo/its
> >
> > _______________________________________________
> > its mailing list
> > its@ietf.org
> > https://www.ietf.org/mailman/listinfo/its


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Date: Tue, 22 Feb 2022 12:47:27 +0900
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To: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Hi Fred,
As you find, it is true that the text of AERO/OMNI is reduced to address
the INTDIR reviewer (Pascal Thubert) during the IETF Last Call.
However, I tried to balance the contents and importance of both the
approaches.

Let's listen to the IESG's review and address their comments.

I am sorry for not satisfying your expectations fully.

Best Regards,
Paul

On Tue, Feb 22, 2022 at 4:56 AM Templin (US), Fred L <
Fred.L.Templin@boeing.com> wrote:

> Hi, I started reviewing this and found that it has been completely
> overhauled since I put my
> comments in many months ago. It has in fact been completely rewritten to
> favor the shared
> IPv6 multilink subnet model over multihop networks, to favor RPL/6LowPan
> over standard
> MANET routing protocols, to favor IPv6 ND changes over standard IPv6 ND,
> and to favor
> multilink DAD. None of that is necessary with AERO/OMNI and the NBMA-based
> virtual link
> created by the OMNI Adaptation. So, I stopped midway through marking up
> the document
> with my comments because it has taken a complete left turn and started
> down a wrong path.
>
> What is mainly at the heart of the divergence is that the document now
> embraces the
> multilink IPv6 subnet model vs the AERO/OMNI NBMA link model that was
> there the last
> time I looked. But, there is no need for such complication when there is a
> much simpler
> alternative at hand. I notice also that in the appendices the AERO/OMNI
> "6M's of Mobile
> Internetworking" was removed - at the very least that needs to be restored.
>
> In its current form, this document has been diverted to go down the wrong
> path. It
> needs to be either re-balanced or re-written.
>
> Thanks - Fred
>
> > -----Original Message-----
> > From: its [mailto:its-bounces@ietf.org] On Behalf Of Templin (US), Fred
> L
> > Sent: Monday, February 21, 2022 7:28 AM
> > To: its@ietf.org; i-d-announce@ietf.org
> > Subject: Re: [ipwave] I-D Action:
> draft-ietf-ipwave-vehicular-networking-26.txt
> >
> > Hi, it looks like a lot of what was in the draft regarding AERO/OMNI has
> been cut out
> > so that means I am going to have to re-review it. I will get to this a
> soon as possible;
> > hopefully in the next couple of days.
> >
> > Fred
> >
> > > -----Original Message-----
> > > From: its [mailto:its-bounces@ietf.org] On Behalf Of
> internet-drafts@ietf.org
> > > Sent: Sunday, February 20, 2022 9:00 PM
> > > To: i-d-announce@ietf.org
> > > Cc: its@ietf.org
> > > Subject: [EXTERNAL] [ipwave] I-D Action:
> draft-ietf-ipwave-vehicular-networking-26.txt
> > >
> > > EXT email: be mindful of links/attachments.
> > >
> > >
> > >
> > >
> > > A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> > > This draft is a work item of the IP Wireless Access in Vehicular
> Environments WG of the IETF.
> > >
> > >         Title           : IPv6 Wireless Access in Vehicular
> Environments (IPWAVE): Problem Statement and Use Cases
> > >         Author          : Jaehoon (Paul) Jeong
> > >     Filename        : draft-ietf-ipwave-vehicular-networking-26.txt
> > >     Pages           : 49
> > >     Date            : 2022-02-20
> > >
> > > Abstract:
> > >    This document discusses the problem statement and use cases of
> > >    IPv6-based vehicular networking for Intelligent Transportation
> > >    Systems (ITS).  The main scenarios of vehicular communications are
> > >    vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and
> > >    vehicle-to-everything (V2X) communications.  First, this document
> > >    explains use cases using V2V, V2I, and V2X networking.  Next, for
> > >    IPv6-based vehicular networks, it makes a gap analysis of current
> > >    IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mobility Management,
> > >    and Security & Privacy), and then enumerates requirements for the
> > >    extensions of those IPv6 protocols for IPv6-based vehicular
> > >    networking.
> > >
> > >
> > > The IETF datatracker status page for this draft is:
> > >
> https://datatracker.ietf.org/doc/draft-ietf-ipwave-vehicular-networking/
> > >
> > > There is also an htmlized version available at:
> > >
> https://datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-networking-26
> > >
> > > A diff from the previous version is available at:
> > >
> https://www.ietf.org/rfcdiff?url2=draft-ietf-ipwave-vehicular-networking-26
> > >
> > >
> > > Internet-Drafts are also available by rsync at rsync.ietf.org:
> :internet-drafts
> > >
> > >
> > > _______________________________________________
> > > its mailing list
> > > its@ietf.org
> > > https://www.ietf.org/mailman/listinfo/its
> >
> > _______________________________________________
> > its mailing list
> > its@ietf.org
> > https://www.ietf.org/mailman/listinfo/its
>
> _______________________________________________
> its mailing list
> its@ietf.org
> https://www.ietf.org/mailman/listinfo/its
>

--000000000000a9bb4705d8933768
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<div dir=3D"ltr">Hi Fred,<div>As you find, it is true that the text of AERO=
/OMNI is reduced to address=C2=A0</div><div>the INTDIR reviewer (Pascal Thu=
bert) during the IETF Last Call.</div><div>However, I tried to balance the =
contents and importance of both the approaches.</div><div><br></div><div>Le=
t&#39;s listen to the IESG&#39;s review and address their comments.</div><d=
iv><br></div><div>I am sorry for not satisfying your expectations fully.</d=
iv><div><br></div><div>Best Regards,</div><div>Paul</div></div><br><div cla=
ss=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Feb 22, 20=
22 at 4:56 AM Templin (US), Fred L &lt;<a href=3D"mailto:Fred.L.Templin@boe=
ing.com">Fred.L.Templin@boeing.com</a>&gt; wrote:<br></div><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid r=
gb(204,204,204);padding-left:1ex">Hi, I started reviewing this and found th=
at it has been completely overhauled since I put my<br>
comments in many months ago. It has in fact been completely rewritten to fa=
vor the shared<br>
IPv6 multilink subnet model over multihop networks, to favor RPL/6LowPan ov=
er standard<br>
MANET routing protocols, to favor IPv6 ND changes over standard IPv6 ND, an=
d to favor<br>
multilink DAD. None of that is necessary with AERO/OMNI and the NBMA-based =
virtual link<br>
created by the OMNI Adaptation. So, I stopped midway through marking up the=
 document<br>
with my comments because it has taken a complete left turn and started down=
 a wrong path.<br>
<br>
What is mainly at the heart of the divergence is that the document now embr=
aces the<br>
multilink IPv6 subnet model vs the AERO/OMNI NBMA link model that was there=
 the last<br>
time I looked. But, there is no need for such complication when there is a =
much simpler<br>
alternative at hand. I notice also that in the appendices the AERO/OMNI &qu=
ot;6M&#39;s of Mobile<br>
Internetworking&quot; was removed - at the very least that needs to be rest=
ored.<br>
<br>
In its current form, this document has been diverted to go down the wrong p=
ath. It<br>
needs to be either re-balanced or re-written.<br>
<br>
Thanks - Fred<br>
<br>
&gt; -----Original Message-----<br>
&gt; From: its [mailto:<a href=3D"mailto:its-bounces@ietf.org" target=3D"_b=
lank">its-bounces@ietf.org</a>] On Behalf Of Templin (US), Fred L<br>
&gt; Sent: Monday, February 21, 2022 7:28 AM<br>
&gt; To: <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</a>=
; <a href=3D"mailto:i-d-announce@ietf.org" target=3D"_blank">i-d-announce@i=
etf.org</a><br>
&gt; Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networki=
ng-26.txt<br>
&gt; <br>
&gt; Hi, it looks like a lot of what was in the draft regarding AERO/OMNI h=
as been cut out<br>
&gt; so that means I am going to have to re-review it. I will get to this a=
 soon as possible;<br>
&gt; hopefully in the next couple of days.<br>
&gt; <br>
&gt; Fred<br>
&gt; <br>
&gt; &gt; -----Original Message-----<br>
&gt; &gt; From: its [mailto:<a href=3D"mailto:its-bounces@ietf.org" target=
=3D"_blank">its-bounces@ietf.org</a>] On Behalf Of <a href=3D"mailto:intern=
et-drafts@ietf.org" target=3D"_blank">internet-drafts@ietf.org</a><br>
&gt; &gt; Sent: Sunday, February 20, 2022 9:00 PM<br>
&gt; &gt; To: <a href=3D"mailto:i-d-announce@ietf.org" target=3D"_blank">i-=
d-announce@ietf.org</a><br>
&gt; &gt; Cc: <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.or=
g</a><br>
&gt; &gt; Subject: [EXTERNAL] [ipwave] I-D Action: draft-ietf-ipwave-vehicu=
lar-networking-26.txt<br>
&gt; &gt;<br>
&gt; &gt; EXT email: be mindful of links/attachments.<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; A New Internet-Draft is available from the on-line Internet-Draft=
s directories.<br>
&gt; &gt; This draft is a work item of the IP Wireless Access in Vehicular =
Environments WG of the IETF.<br>
&gt; &gt;<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Title=C2=A0 =C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0: IPv6 Wireless Access in Vehicular Environments (IPWAVE): Pr=
oblem Statement and Use Cases<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Author=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 : Jaehoon (Paul) Jeong<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft-ie=
tf-ipwave-vehicular-networking-26.txt<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=
: 49<br>
&gt; &gt;=C2=A0 =C2=A0 =C2=A0Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
: 2022-02-20<br>
&gt; &gt;<br>
&gt; &gt; Abstract:<br>
&gt; &gt;=C2=A0 =C2=A0 This document discusses the problem statement and us=
e cases of<br>
&gt; &gt;=C2=A0 =C2=A0 IPv6-based vehicular networking for Intelligent Tran=
sportation<br>
&gt; &gt;=C2=A0 =C2=A0 Systems (ITS).=C2=A0 The main scenarios of vehicular=
 communications are<br>
&gt; &gt;=C2=A0 =C2=A0 vehicle-to-vehicle (V2V), vehicle-to-infrastructure =
(V2I), and<br>
&gt; &gt;=C2=A0 =C2=A0 vehicle-to-everything (V2X) communications.=C2=A0 Fi=
rst, this document<br>
&gt; &gt;=C2=A0 =C2=A0 explains use cases using V2V, V2I, and V2X networkin=
g.=C2=A0 Next, for<br>
&gt; &gt;=C2=A0 =C2=A0 IPv6-based vehicular networks, it makes a gap analys=
is of current<br>
&gt; &gt;=C2=A0 =C2=A0 IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mobil=
ity Management,<br>
&gt; &gt;=C2=A0 =C2=A0 and Security &amp; Privacy), and then enumerates req=
uirements for the<br>
&gt; &gt;=C2=A0 =C2=A0 extensions of those IPv6 protocols for IPv6-based ve=
hicular<br>
&gt; &gt;=C2=A0 =C2=A0 networking.<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; The IETF datatracker status page for this draft is:<br>
&gt; &gt; <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-ipwave-veh=
icular-networking/" rel=3D"noreferrer" target=3D"_blank">https://datatracke=
r.ietf.org/doc/draft-ietf-ipwave-vehicular-networking/</a><br>
&gt; &gt;<br>
&gt; &gt; There is also an htmlized version available at:<br>
&gt; &gt; <a href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-ipwav=
e-vehicular-networking-26" rel=3D"noreferrer" target=3D"_blank">https://dat=
atracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-networking-26</a><br=
>
&gt; &gt;<br>
&gt; &gt; A diff from the previous version is available at:<br>
&gt; &gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwave-=
vehicular-networking-26" rel=3D"noreferrer" target=3D"_blank">https://www.i=
etf.org/rfcdiff?url2=3Ddraft-ietf-ipwave-vehicular-networking-26</a><br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; Internet-Drafts are also available by rsync at rsync.ietf.org::in=
ternet-drafts<br>
&gt; &gt;<br>
&gt; &gt;<br>
&gt; &gt; _______________________________________________<br>
&gt; &gt; its mailing list<br>
&gt; &gt; <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</a=
><br>
&gt; &gt; <a href=3D"https://www.ietf.org/mailman/listinfo/its" rel=3D"nore=
ferrer" target=3D"_blank">https://www.ietf.org/mailman/listinfo/its</a><br>
&gt; <br>
&gt; _______________________________________________<br>
&gt; its mailing list<br>
&gt; <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</a><br>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/its" rel=3D"noreferre=
r" target=3D"_blank">https://www.ietf.org/mailman/listinfo/its</a><br>
<br>
_______________________________________________<br>
its mailing list<br>
<a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/its" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/listinfo/its</a><br>
</blockquote></div>

--000000000000a9bb4705d8933768--


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From: "Mr. Jaehoon Paul Jeong" <jaehoon.paul@gmail.com>
Date: Tue, 22 Feb 2022 12:49:36 +0900
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--0000000000005bd8c005d8933f8a
Content-Type: text/plain; charset="UTF-8"

Hi Russ,
I have replied to Fred's email just before.
As the editor, I tried to balance the two approaches even though the text
of AERO/OMNI is reduced.

Fred,
I hope you can understand my position as the editor.

Thanks.

Best Regards,
Paul


On Tue, Feb 22, 2022 at 5:26 AM Russ Housley <housley@vigilsec.com> wrote:

> Paul and Fred:
>
> I think the update is more aligned with the documents that are advancing
> one the IETF stream.  That said, I would not be apposed to the inclusion of
> the 6M's, but not in a way that claims that there is only one approach way
> to address these things.  What do you think about that was a way forward?
>
> Russ
>
>
> > On Feb 21, 2022, at 2:56 PM, Templin (US), Fred L <
> Fred.L.Templin@boeing.com> wrote:
> >
> > Hi, I started reviewing this and found that it has been completely
> overhauled since I put my
> > comments in many months ago. It has in fact been completely rewritten to
> favor the shared
> > IPv6 multilink subnet model over multihop networks, to favor RPL/6LowPan
> over standard
> > MANET routing protocols, to favor IPv6 ND changes over standard IPv6 ND,
> and to favor
> > multilink DAD. None of that is necessary with AERO/OMNI and the
> NBMA-based virtual link
> > created by the OMNI Adaptation. So, I stopped midway through marking up
> the document
> > with my comments because it has taken a complete left turn and started
> down a wrong path.
> >
> > What is mainly at the heart of the divergence is that the document now
> embraces the
> > multilink IPv6 subnet model vs the AERO/OMNI NBMA link model that was
> there the last
> > time I looked. But, there is no need for such complication when there is
> a much simpler
> > alternative at hand. I notice also that in the appendices the AERO/OMNI
> "6M's of Mobile
> > Internetworking" was removed - at the very least that needs to be
> restored.
> >
> > In its current form, this document has been diverted to go down the
> wrong path. It
> > needs to be either re-balanced or re-written.
> >
> > Thanks - Fred
> >
> >> -----Original Message-----
> >> From: its [mailto:its-bounces@ietf.org] On Behalf Of Templin (US),
> Fred L
> >> Sent: Monday, February 21, 2022 7:28 AM
> >> To: its@ietf.org; i-d-announce@ietf.org
> >> Subject: Re: [ipwave] I-D Action:
> draft-ietf-ipwave-vehicular-networking-26.txt
> >>
> >> Hi, it looks like a lot of what was in the draft regarding AERO/OMNI
> has been cut out
> >> so that means I am going to have to re-review it. I will get to this a
> soon as possible;
> >> hopefully in the next couple of days.
> >>
> >> Fred
> >>
> >>> -----Original Message-----
> >>> From: its [mailto:its-bounces@ietf.org] On Behalf Of
> internet-drafts@ietf.org
> >>> Sent: Sunday, February 20, 2022 9:00 PM
> >>> To: i-d-announce@ietf.org
> >>> Cc: its@ietf.org
> >>> Subject: [EXTERNAL] [ipwave] I-D Action:
> draft-ietf-ipwave-vehicular-networking-26.txt
> >>>
> >>> EXT email: be mindful of links/attachments.
> >>>
> >>>
> >>>
> >>>
> >>> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> >>> This draft is a work item of the IP Wireless Access in Vehicular
> Environments WG of the IETF.
> >>>
> >>>        Title           : IPv6 Wireless Access in Vehicular
> Environments (IPWAVE): Problem Statement and Use Cases
> >>>        Author          : Jaehoon (Paul) Jeong
> >>>     Filename        : draft-ietf-ipwave-vehicular-networking-26.txt
> >>>     Pages           : 49
> >>>     Date            : 2022-02-20
> >>>
> >>> Abstract:
> >>>   This document discusses the problem statement and use cases of
> >>>   IPv6-based vehicular networking for Intelligent Transportation
> >>>   Systems (ITS).  The main scenarios of vehicular communications are
> >>>   vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and
> >>>   vehicle-to-everything (V2X) communications.  First, this document
> >>>   explains use cases using V2V, V2I, and V2X networking.  Next, for
> >>>   IPv6-based vehicular networks, it makes a gap analysis of current
> >>>   IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mobility Management,
> >>>   and Security & Privacy), and then enumerates requirements for the
> >>>   extensions of those IPv6 protocols for IPv6-based vehicular
> >>>   networking.
> >>>
> >>>
> >>> The IETF datatracker status page for this draft is:
> >>>
> https://datatracker.ietf.org/doc/draft-ietf-ipwave-vehicular-networking/
> >>>
> >>> There is also an htmlized version available at:
> >>>
> https://datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-networking-26
> >>>
> >>> A diff from the previous version is available at:
> >>>
> https://www.ietf.org/rfcdiff?url2=draft-ietf-ipwave-vehicular-networking-26
> >>>
> >>>
> >>> Internet-Drafts are also available by rsync at rsync.ietf.org:
> :internet-drafts
> >>>
> >>>
> >>> _______________________________________________
> >>> its mailing list
> >>> its@ietf.org
> >>> https://www.ietf.org/mailman/listinfo/its
> >>
> >> _______________________________________________
> >> its mailing list
> >> its@ietf.org
> >> https://www.ietf.org/mailman/listinfo/its
> >
> > _______________________________________________
> > its mailing list
> > its@ietf.org
> > https://www.ietf.org/mailman/listinfo/its
>
>

--0000000000005bd8c005d8933f8a
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi Russ,<div>I have replied to Fred&#39;s email just befor=
e.</div><div>As the editor, I tried to balance the two approaches even thou=
gh the text of AERO/OMNI is reduced.</div><div><br></div><div>Fred,</div><d=
iv>I hope you can understand my position as the editor.</div><div><br></div=
><div>Thanks.</div><div><br></div><div>Best Regards,</div><div>Paul</div><d=
iv><br></div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D=
"gmail_attr">On Tue, Feb 22, 2022 at 5:26 AM Russ Housley &lt;<a href=3D"ma=
ilto:housley@vigilsec.com">housley@vigilsec.com</a>&gt; wrote:<br></div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-lef=
t:1px solid rgb(204,204,204);padding-left:1ex">Paul and Fred:<br>
<br>
I think the update is more aligned with the documents that are advancing on=
e the IETF stream.=C2=A0 That said, I would not be apposed to the inclusion=
 of the 6M&#39;s, but not in a way that claims that there is only one appro=
ach way to address these things.=C2=A0 What do you think about that was a w=
ay forward?<br>
<br>
Russ<br>
<br>
<br>
&gt; On Feb 21, 2022, at 2:56 PM, Templin (US), Fred L &lt;<a href=3D"mailt=
o:Fred.L.Templin@boeing.com" target=3D"_blank">Fred.L.Templin@boeing.com</a=
>&gt; wrote:<br>
&gt; <br>
&gt; Hi, I started reviewing this and found that it has been completely ove=
rhauled since I put my<br>
&gt; comments in many months ago. It has in fact been completely rewritten =
to favor the shared<br>
&gt; IPv6 multilink subnet model over multihop networks, to favor RPL/6LowP=
an over standard<br>
&gt; MANET routing protocols, to favor IPv6 ND changes over standard IPv6 N=
D, and to favor<br>
&gt; multilink DAD. None of that is necessary with AERO/OMNI and the NBMA-b=
ased virtual link<br>
&gt; created by the OMNI Adaptation. So, I stopped midway through marking u=
p the document<br>
&gt; with my comments because it has taken a complete left turn and started=
 down a wrong path.<br>
&gt; <br>
&gt; What is mainly at the heart of the divergence is that the document now=
 embraces the<br>
&gt; multilink IPv6 subnet model vs the AERO/OMNI NBMA link model that was =
there the last<br>
&gt; time I looked. But, there is no need for such complication when there =
is a much simpler<br>
&gt; alternative at hand. I notice also that in the appendices the AERO/OMN=
I &quot;6M&#39;s of Mobile<br>
&gt; Internetworking&quot; was removed - at the very least that needs to be=
 restored.<br>
&gt; <br>
&gt; In its current form, this document has been diverted to go down the wr=
ong path. It<br>
&gt; needs to be either re-balanced or re-written.<br>
&gt; <br>
&gt; Thanks - Fred<br>
&gt; <br>
&gt;&gt; -----Original Message-----<br>
&gt;&gt; From: its [mailto:<a href=3D"mailto:its-bounces@ietf.org" target=
=3D"_blank">its-bounces@ietf.org</a>] On Behalf Of Templin (US), Fred L<br>
&gt;&gt; Sent: Monday, February 21, 2022 7:28 AM<br>
&gt;&gt; To: <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org=
</a>; <a href=3D"mailto:i-d-announce@ietf.org" target=3D"_blank">i-d-announ=
ce@ietf.org</a><br>
&gt;&gt; Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-netw=
orking-26.txt<br>
&gt;&gt; <br>
&gt;&gt; Hi, it looks like a lot of what was in the draft regarding AERO/OM=
NI has been cut out<br>
&gt;&gt; so that means I am going to have to re-review it. I will get to th=
is a soon as possible;<br>
&gt;&gt; hopefully in the next couple of days.<br>
&gt;&gt; <br>
&gt;&gt; Fred<br>
&gt;&gt; <br>
&gt;&gt;&gt; -----Original Message-----<br>
&gt;&gt;&gt; From: its [mailto:<a href=3D"mailto:its-bounces@ietf.org" targ=
et=3D"_blank">its-bounces@ietf.org</a>] On Behalf Of <a href=3D"mailto:inte=
rnet-drafts@ietf.org" target=3D"_blank">internet-drafts@ietf.org</a><br>
&gt;&gt;&gt; Sent: Sunday, February 20, 2022 9:00 PM<br>
&gt;&gt;&gt; To: <a href=3D"mailto:i-d-announce@ietf.org" target=3D"_blank"=
>i-d-announce@ietf.org</a><br>
&gt;&gt;&gt; Cc: <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf=
.org</a><br>
&gt;&gt;&gt; Subject: [EXTERNAL] [ipwave] I-D Action: draft-ietf-ipwave-veh=
icular-networking-26.txt<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; EXT email: be mindful of links/attachments.<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; A New Internet-Draft is available from the on-line Internet-Dr=
afts directories.<br>
&gt;&gt;&gt; This draft is a work item of the IP Wireless Access in Vehicul=
ar Environments WG of the IETF.<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Title=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0: IPv6 Wireless Access in Vehicular Environments (IPWAVE): Pro=
blem Statement and Use Cases<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Author=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 : Jaehoon (Paul) Jeong<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft=
-ietf-ipwave-vehicular-networking-26.txt<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0: 49<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 : 2022-02-20<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; Abstract:<br>
&gt;&gt;&gt;=C2=A0 =C2=A0This document discusses the problem statement and =
use cases of<br>
&gt;&gt;&gt;=C2=A0 =C2=A0IPv6-based vehicular networking for Intelligent Tr=
ansportation<br>
&gt;&gt;&gt;=C2=A0 =C2=A0Systems (ITS).=C2=A0 The main scenarios of vehicul=
ar communications are<br>
&gt;&gt;&gt;=C2=A0 =C2=A0vehicle-to-vehicle (V2V), vehicle-to-infrastructur=
e (V2I), and<br>
&gt;&gt;&gt;=C2=A0 =C2=A0vehicle-to-everything (V2X) communications.=C2=A0 =
First, this document<br>
&gt;&gt;&gt;=C2=A0 =C2=A0explains use cases using V2V, V2I, and V2X network=
ing.=C2=A0 Next, for<br>
&gt;&gt;&gt;=C2=A0 =C2=A0IPv6-based vehicular networks, it makes a gap anal=
ysis of current<br>
&gt;&gt;&gt;=C2=A0 =C2=A0IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mob=
ility Management,<br>
&gt;&gt;&gt;=C2=A0 =C2=A0and Security &amp; Privacy), and then enumerates r=
equirements for the<br>
&gt;&gt;&gt;=C2=A0 =C2=A0extensions of those IPv6 protocols for IPv6-based =
vehicular<br>
&gt;&gt;&gt;=C2=A0 =C2=A0networking.<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; The IETF datatracker status page for this draft is:<br>
&gt;&gt;&gt; <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-ipwave-=
vehicular-networking/" rel=3D"noreferrer" target=3D"_blank">https://datatra=
cker.ietf.org/doc/draft-ietf-ipwave-vehicular-networking/</a><br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; There is also an htmlized version available at:<br>
&gt;&gt;&gt; <a href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-ip=
wave-vehicular-networking-26" rel=3D"noreferrer" target=3D"_blank">https://=
datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-networking-26</a>=
<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; A diff from the previous version is available at:<br>
&gt;&gt;&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwa=
ve-vehicular-networking-26" rel=3D"noreferrer" target=3D"_blank">https://ww=
w.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwave-vehicular-networking-26</a><br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; Internet-Drafts are also available by rsync at rsync.ietf.org:=
:internet-drafts<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; _______________________________________________<br>
&gt;&gt;&gt; its mailing list<br>
&gt;&gt;&gt; <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org=
</a><br>
&gt;&gt;&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/its" rel=3D"n=
oreferrer" target=3D"_blank">https://www.ietf.org/mailman/listinfo/its</a><=
br>
&gt;&gt; <br>
&gt;&gt; _______________________________________________<br>
&gt;&gt; its mailing list<br>
&gt;&gt; <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</a>=
<br>
&gt;&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/its" rel=3D"noref=
errer" target=3D"_blank">https://www.ietf.org/mailman/listinfo/its</a><br>
&gt; <br>
&gt; _______________________________________________<br>
&gt; its mailing list<br>
&gt; <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</a><br>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/its" rel=3D"noreferre=
r" target=3D"_blank">https://www.ietf.org/mailman/listinfo/its</a><br>
<br>
</blockquote></div>

--0000000000005bd8c005d8933f8a--


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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
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Thread-Topic: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Archived-At: <https://mailarchive.ietf.org/arch/msg/its/7XMzRhwSqDOuiC7J5lvptmNZgLk>
Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: "Dirk.von-Hugo@telekom.de" <Dirk.von-Hugo@telekom.de>, "jaehoon.paul@gmail.com" <jaehoon.paul@gmail.com>, "housley@vigilsec.com" <housley@vigilsec.com>
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Thread-Topic: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Date: Tue, 22 Feb 2022 15:57:07 +0000
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From: "Mr. Jaehoon Paul Jeong" <jaehoon.paul@gmail.com>
Date: Wed, 23 Feb 2022 07:20:14 +0900
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To: Dirk.von-Hugo@telekom.de
Cc: Fred.L.Templin@boeing.com, housley@vigilsec.com, its@ietf.org
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Hi Dirk,
I will address your comments on the revision.

You are right.
AERO uses Automatic instead of Asymmetric in the latest version.

Thanks.

Best Regards,
Paul

2022=EB=85=84 2=EC=9B=94 23=EC=9D=BC (=EC=88=98) =EC=98=A4=EC=A0=84 12:45, =
<Dirk.von-Hugo@telekom.de>=EB=8B=98=EC=9D=B4 =EC=9E=91=EC=84=B1:

> Dear Fred, Paul, Russ and all,
>
> From my point of view - only loosely following this discussion - I do
> agree that Paul has achieved a good balance between different protocols
> included/mentioned. Thanks for that!
>
>
>
> Just a small typo: on page 3 it should also read
>
> =E2=80=98Automatic Extended Route Optimization (AERO)=E2=80=99 instead of=
 =E2=80=98Asymmetric
> Extended Route Optimization (AERO)=E2=80=99
>
> And maybe one could add on p. 14 the sentence
>
> =E2=80=98Refer to Appendix A for the description how OMNI can support use=
 of
> multiple radio technologies in V2X=E2=80=99.
>
>
>
> Would that help? What do you think?
>
> Thanks
>
> Best regards
>
> Dirk
>
>
>
> *Von:* its <its-bounces@ietf.org> *Im Auftrag von *Templin (US), Fred L
> *Gesendet:* Dienstag, 22. Februar 2022 15:35
> *An:* Mr. Jaehoon Paul Jeong <jaehoon.paul@gmail.com>; Russ Housley <
> housley@vigilsec.com>
> *Cc:* its@ietf.org
> *Betreff:* Re: [ipwave] I-D Action:
> draft-ietf-ipwave-vehicular-networking-26.txt
>
>
>
> The way the document is now, it reads as an endorsement for a particular
> approach.
>
> The document was good last time I read it (which is a while ago) but I
> guess someone
>
> got you to make drastic changes without my knowing about it. The document
> cannot
>
> go forward in its current form.
>
>
>
> Fred
>
>
>
> *From:* Mr. Jaehoon Paul Jeong [mailto:jaehoon.paul@gmail.com
> <jaehoon.paul@gmail.com>]
> *Sent:* Monday, February 21, 2022 7:50 PM
> *To:* Russ Housley <housley@vigilsec.com>; Templin (US), Fred L <
> Fred.L.Templin@boeing.com>
> *Cc:* its@ietf.org; Mr. Jaehoon Paul Jeong <jaehoon.paul@gmail.com>
> *Subject:* [EXTERNAL] Re: [ipwave] I-D Action:
> draft-ietf-ipwave-vehicular-networking-26.txt
>
>
>
> EXT email: be mindful of links/attachments.
>
>
>
>
> Hi Russ,
>
> I have replied to Fred's email just before.
>
> As the editor, I tried to balance the two approaches even though the text
> of AERO/OMNI is reduced.
>
>
>
> Fred,
>
> I hope you can understand my position as the editor.
>
>
>
> Thanks.
>
>
>
> Best Regards,
>
> Paul
>
>
>
>
>
> On Tue, Feb 22, 2022 at 5:26 AM Russ Housley <housley@vigilsec.com> wrote=
:
>
> Paul and Fred:
>
> I think the update is more aligned with the documents that are advancing
> one the IETF stream.  That said, I would not be apposed to the inclusion =
of
> the 6M's, but not in a way that claims that there is only one approach wa=
y
> to address these things.  What do you think about that was a way forward?
>
> Russ
>
>
> > On Feb 21, 2022, at 2:56 PM, Templin (US), Fred L <
> Fred.L.Templin@boeing.com> wrote:
> >
> > Hi, I started reviewing this and found that it has been completely
> overhauled since I put my
> > comments in many months ago. It has in fact been completely rewritten t=
o
> favor the shared
> > IPv6 multilink subnet model over multihop networks, to favor RPL/6LowPa=
n
> over standard
> > MANET routing protocols, to favor IPv6 ND changes over standard IPv6 ND=
,
> and to favor
> > multilink DAD. None of that is necessary with AERO/OMNI and the
> NBMA-based virtual link
> > created by the OMNI Adaptation. So, I stopped midway through marking up
> the document
> > with my comments because it has taken a complete left turn and started
> down a wrong path.
> >
> > What is mainly at the heart of the divergence is that the document now
> embraces the
> > multilink IPv6 subnet model vs the AERO/OMNI NBMA link model that was
> there the last
> > time I looked. But, there is no need for such complication when there i=
s
> a much simpler
> > alternative at hand. I notice also that in the appendices the AERO/OMNI
> "6M's of Mobile
> > Internetworking" was removed - at the very least that needs to be
> restored.
> >
> > In its current form, this document has been diverted to go down the
> wrong path. It
> > needs to be either re-balanced or re-written.
> >
> > Thanks - Fred
> >
> >> -----Original Message-----
> >> From: its [mailto:its-bounces@ietf.org] On Behalf Of Templin (US),
> Fred L
> >> Sent: Monday, February 21, 2022 7:28 AM
> >> To: its@ietf.org; i-d-announce@ietf.org
> >> Subject: Re: [ipwave] I-D Action:
> draft-ietf-ipwave-vehicular-networking-26.txt
> >>
> >> Hi, it looks like a lot of what was in the draft regarding AERO/OMNI
> has been cut out
> >> so that means I am going to have to re-review it. I will get to this a
> soon as possible;
> >> hopefully in the next couple of days.
> >>
> >> Fred
> >>
> >>> -----Original Message-----
> >>> From: its [mailto:its-bounces@ietf.org] On Behalf Of
> internet-drafts@ietf.org
> >>> Sent: Sunday, February 20, 2022 9:00 PM
> >>> To: i-d-announce@ietf.org
> >>> Cc: its@ietf.org
> >>> Subject: [EXTERNAL] [ipwave] I-D Action:
> draft-ietf-ipwave-vehicular-networking-26.txt
> >>>
> >>> EXT email: be mindful of links/attachments.
> >>>
> >>>
> >>>
> >>>
> >>> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> >>> This draft is a work item of the IP Wireless Access in Vehicular
> Environments WG of the IETF.
> >>>
> >>>        Title           : IPv6 Wireless Access in Vehicular
> Environments (IPWAVE): Problem Statement and Use Cases
> >>>        Author          : Jaehoon (Paul) Jeong
> >>>     Filename        : draft-ietf-ipwave-vehicular-networking-26.txt
> >>>     Pages           : 49
> >>>     Date            : 2022-02-20
> >>>
> >>> Abstract:
> >>>   This document discusses the problem statement and use cases of
> >>>   IPv6-based vehicular networking for Intelligent Transportation
> >>>   Systems (ITS).  The main scenarios of vehicular communications are
> >>>   vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and
> >>>   vehicle-to-everything (V2X) communications.  First, this document
> >>>   explains use cases using V2V, V2I, and V2X networking.  Next, for
> >>>   IPv6-based vehicular networks, it makes a gap analysis of current
> >>>   IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mobility Management,
> >>>   and Security & Privacy), and then enumerates requirements for the
> >>>   extensions of those IPv6 protocols for IPv6-based vehicular
> >>>   networking.
> >>>
> >>>
> >>> The IETF datatracker status page for this draft is:
> >>>
> https://datatracker.ietf.org/doc/draft-ietf-ipwave-vehicular-networking/
> >>>
> >>> There is also an htmlized version available at:
> >>>
> https://datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-network=
ing-26
> >>>
> >>> A diff from the previous version is available at:
> >>>
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwave-vehicular-networkin=
g-26
> >>>
> >>>
> >>> Internet-Drafts are also available by rsync at rsync.ietf.org:
> :internet-drafts
> >>>
> >>>
> >>> _______________________________________________
> >>> its mailing list
> >>> its@ietf.org
> >>> https://www.ietf.org/mailman/listinfo/its
> >>
> >> _______________________________________________
> >> its mailing list
> >> its@ietf.org
> >> https://www.ietf.org/mailman/listinfo/its
> >
> > _______________________________________________
> > its mailing list
> > its@ietf.org
> > https://www.ietf.org/mailman/listinfo/its
>
> --
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D
Mr. Jaehoon (Paul) Jeong, Ph.D.
Associate Professor
Department Head
Department of Computer Science and Engineering
Sungkyunkwan University
Office: +82-31-299-4957
Email: pauljeong@skku.edu, jaehoon.paul@gmail.com
Personal Homepage: http://iotlab.skku.edu/people-jaehoon-jeong.php
<http://cpslab.skku.edu/people-jaehoon-jeong.php>

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<div><div dir=3D"auto">Hi Dirk,</div><div dir=3D"auto">I will address your =
comments on the revision.</div><div dir=3D"auto"><br></div><div dir=3D"auto=
">You are right.</div><div dir=3D"auto">AERO uses Automatic instead of Asym=
metric in the latest version.</div><div dir=3D"auto"><br></div><div dir=3D"=
auto">Thanks.</div><div dir=3D"auto"><br></div><div dir=3D"auto">Best Regar=
ds,</div><div dir=3D"auto">Paul</div><div><br><div class=3D"gmail_quote"><d=
iv dir=3D"ltr" class=3D"gmail_attr">2022=EB=85=84 2=EC=9B=94 23=EC=9D=BC (=
=EC=88=98) =EC=98=A4=EC=A0=84 12:45, &lt;<a href=3D"mailto:Dirk.von-Hugo@te=
lekom.de" target=3D"_blank">Dirk.von-Hugo@telekom.de</a>&gt;=EB=8B=98=EC=9D=
=B4 =EC=9E=91=EC=84=B1:<br></div></div></div></div><div><div><div class=3D"=
gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px =
0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border=
-left-color:rgb(204,204,204)">





<div lang=3D"DE" link=3D"blue" vlink=3D"purple" style=3D"word-wrap:break-wo=
rd">
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif">Dear Fred, Paul, Russ and all,<u style=3D"font-fam=
ily:Calibri,sans-serif"></u><u style=3D"font-family:Calibri,sans-serif"></u=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif">From my point of view - only loosely following thi=
s discussion - I do agree that Paul has achieved a good balance between dif=
ferent
 protocols included/mentioned. Thanks for that!<u style=3D"font-family:Cali=
bri,sans-serif"></u><u style=3D"font-family:Calibri,sans-serif"></u></span>=
</p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif"><u style=3D"font-family:Calibri,sans-serif"></u>=
=C2=A0<u style=3D"font-family:Calibri,sans-serif"></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif">Just a small typo: on page 3 it should also read
<u style=3D"font-family:Calibri,sans-serif"></u><u style=3D"font-family:Cal=
ibri,sans-serif"></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif">=E2=80=98Automatic Extended Route Optimization (AE=
RO)=E2=80=99 instead of =E2=80=98Asymmetric Extended Route Optimization (AE=
RO)=E2=80=99<u style=3D"font-family:Calibri,sans-serif"></u><u style=3D"fon=
t-family:Calibri,sans-serif"></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif">And maybe one could add on p. 14 the sentence<u st=
yle=3D"font-family:Calibri,sans-serif"></u><u style=3D"font-family:Calibri,=
sans-serif"></u></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span lang=3D"EN-US" st=
yle=3D"font-size:11pt;font-family:Calibri,sans-serif">=E2=80=98Refer to App=
endix A for the description how OMNI can support use of multiple radio tech=
nologies in V2X=E2=80=99.<u style=3D"font-family:Calibri,sans-serif"></u><u=
 style=3D"font-family:Calibri,sans-serif"></u></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span lang=3D"EN-US" st=
yle=3D"font-size:11pt;font-family:Calibri,sans-serif"><u style=3D"font-fami=
ly:Calibri,sans-serif"></u>=C2=A0<u style=3D"font-family:Calibri,sans-serif=
"></u></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span lang=3D"EN-US" st=
yle=3D"font-size:11pt;font-family:Calibri,sans-serif">Would that help? What=
 do you think?<u style=3D"font-family:Calibri,sans-serif"></u><u style=3D"f=
ont-family:Calibri,sans-serif"></u></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span lang=3D"EN-US" st=
yle=3D"font-size:11pt;font-family:Calibri,sans-serif">Thanks<u style=3D"fon=
t-family:Calibri,sans-serif"></u><u style=3D"font-family:Calibri,sans-serif=
"></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">Best regards<u style=3D"font-family:Calibri,sans-serif"></u><u st=
yle=3D"font-family:Calibri,sans-serif"></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">Dirk<u style=3D"font-family:Calibri,sans-serif"></u><u style=3D"f=
ont-family:Calibri,sans-serif"></u></span></p></div></div><div lang=3D"DE" =
link=3D"blue" vlink=3D"purple" style=3D"word-wrap:break-word"><div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif"><u style=3D"font-family:Calibri,sans-serif"></u>=C2=A0<u style=3D=
"font-family:Calibri,sans-serif"></u></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span><span lang=3D"EN-=
US"><u></u><u></u></span></span></p>
<div>
<div style=3D"border-style:solid none none;border-top-width:1pt;padding:3pt=
 0cm 0cm;border-top-color:rgb(225,225,225)">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11pt;font-family:Calibri=
,sans-serif">Von:</span></b><span style=3D"font-size:11pt;font-family:Calib=
ri,sans-serif"> its &lt;<a href=3D"mailto:its-bounces@ietf.org" style=3D"fo=
nt-family:Calibri,sans-serif" target=3D"_blank">its-bounces@ietf.org</a>&gt=
;
<b style=3D"font-family:Calibri,sans-serif">Im Auftrag von </b>Templin (US)=
, Fred L<br>
<b style=3D"font-family:Calibri,sans-serif">Gesendet:</b> Dienstag, 22. Feb=
ruar 2022 15:35<br>
<b style=3D"font-family:Calibri,sans-serif">An:</b> Mr. Jaehoon Paul Jeong =
&lt;<a href=3D"mailto:jaehoon.paul@gmail.com" style=3D"font-family:Calibri,=
sans-serif" target=3D"_blank">jaehoon.paul@gmail.com</a>&gt;; Russ Housley =
&lt;<a href=3D"mailto:housley@vigilsec.com" style=3D"font-family:Calibri,sa=
ns-serif" target=3D"_blank">housley@vigilsec.com</a>&gt;<br>
<b style=3D"font-family:Calibri,sans-serif">Cc:</b> <a href=3D"mailto:its@i=
etf.org" style=3D"font-family:Calibri,sans-serif" target=3D"_blank">its@iet=
f.org</a><br>
<b style=3D"font-family:Calibri,sans-serif">Betreff:</b> Re: [ipwave] I-D A=
ction: draft-ietf-ipwave-vehicular-networking-26.txt<u style=3D"font-family=
:Calibri,sans-serif"></u><u style=3D"font-family:Calibri,sans-serif"></u></=
span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)">The way the document is now, =
it reads as an endorsement for a particular approach.<u style=3D"font-famil=
y:Calibri,sans-serif"></u><u style=3D"font-family:Calibri,sans-serif"></u><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)">The document was good last ti=
me I read it (which is a while ago) but I guess someone<u style=3D"font-fam=
ily:Calibri,sans-serif"></u><u style=3D"font-family:Calibri,sans-serif"></u=
></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)">got you to make drastic chang=
es without my knowing about it. The document cannot<u style=3D"font-family:=
Calibri,sans-serif"></u><u style=3D"font-family:Calibri,sans-serif"></u></s=
pan></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)">go forward in its current for=
m.<u style=3D"font-family:Calibri,sans-serif"></u><u style=3D"font-family:C=
alibri,sans-serif"></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)"><u style=3D"font-family:Calib=
ri,sans-serif"></u>=C2=A0<u style=3D"font-family:Calibri,sans-serif"></u></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)">Fred<u style=3D"font-family:C=
alibri,sans-serif"></u><u style=3D"font-family:Calibri,sans-serif"></u></sp=
an></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif;color:rgb(31,73,125)"><u style=3D"font-family:Calib=
ri,sans-serif"></u>=C2=A0<u style=3D"font-family:Calibri,sans-serif"></u></=
span></p>
<div style=3D"border-style:none none none solid;border-left-width:1.5pt;pad=
ding:0cm 0cm 0cm 4pt;border-left-color:blue">
<div>
<div style=3D"border-style:solid none none;border-top-width:1pt;padding:3pt=
 0cm 0cm;border-top-color:rgb(225,225,225)">
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:11pt;font=
-family:Calibri,sans-serif">From:</span></b><span lang=3D"EN-US" style=3D"f=
ont-size:11pt;font-family:Calibri,sans-serif"> Mr. Jaehoon Paul Jeong [<a h=
ref=3D"mailto:jaehoon.paul@gmail.com" style=3D"font-family:Calibri,sans-ser=
if" target=3D"_blank">mailto:jaehoon.paul@gmail.com</a>]
<br>
<b style=3D"font-family:Calibri,sans-serif">Sent:</b> Monday, February 21, =
2022 7:50 PM<br>
<b style=3D"font-family:Calibri,sans-serif">To:</b> Russ Housley &lt;<a hre=
f=3D"mailto:housley@vigilsec.com" style=3D"font-family:Calibri,sans-serif" =
target=3D"_blank">housley@vigilsec.com</a>&gt;; Templin (US), Fred L &lt;<a=
 href=3D"mailto:Fred.L.Templin@boeing.com" style=3D"font-family:Calibri,san=
s-serif" target=3D"_blank">Fred.L.Templin@boeing.com</a>&gt;<br>
<b style=3D"font-family:Calibri,sans-serif">Cc:</b> <a href=3D"mailto:its@i=
etf.org" style=3D"font-family:Calibri,sans-serif" target=3D"_blank">its@iet=
f.org</a>; Mr. Jaehoon Paul Jeong &lt;<a href=3D"mailto:jaehoon.paul@gmail.=
com" style=3D"font-family:Calibri,sans-serif" target=3D"_blank">jaehoon.pau=
l@gmail.com</a>&gt;<br>
<b style=3D"font-family:Calibri,sans-serif">Subject:</b> [EXTERNAL] Re: [ip=
wave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt<u style=3D"=
font-family:Calibri,sans-serif"></u><u style=3D"font-family:Calibri,sans-se=
rif"></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US"><u></u>=C2=A0<u></u></span></p>
<table border=3D"0" cellspacing=3D"3" cellpadding=3D"0" width=3D"100%" styl=
e=3D"width:100%">
<tbody>
<tr>
<td style=3D"padding:0.75pt;background-color:white">
<table border=3D"0" cellspacing=3D"0" cellpadding=3D"0" align=3D"left" widt=
h=3D"100%" style=3D"width:100%;margin-left:0.75pt;margin-right:0.75pt">
<tbody>
<tr>
<td style=3D"padding:5.25pt 1.5pt;background-color:rgb(145,10,25)"></td>
<td width=3D"100%" style=3D"width:100%;padding:5.25pt 3.75pt 5.25pt 11.25pt=
;background-color:rgb(253,242,244)">
<div>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:Verdana,sans-serif;color:rgb(33,3=
3,33)">EXT email: be mindful of links/attachments.</span><u></u><u></u></p>
</div>
</td>
</tr>
</tbody>
</table>
<pre style=3D"font-family:monospace"><span style=3D"font-family:monospace;c=
olor:black"><br>=C2=A0<u style=3D"font-family:monospace"></u><u style=3D"fo=
nt-family:monospace"></u></span></pre>
</td>
</tr>
</tbody>
</table>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:Calibri,sans-serif">Hi Russ,<u style=3D"font-family:Calibri,sans-serif=
"></u><u style=3D"font-family:Calibri,sans-serif"></u></span></p>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:Calibri,sans-serif">I have replied to Fred&#39;s email just before.<u =
style=3D"font-family:Calibri,sans-serif"></u><u style=3D"font-family:Calibr=
i,sans-serif"></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:Calibri,sans-serif">As the editor, I tried to balance the two approach=
es even though the text of AERO/OMNI is reduced.<u style=3D"font-family:Cal=
ibri,sans-serif"></u><u style=3D"font-family:Calibri,sans-serif"></u></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:Calibri,sans-serif"><u style=3D"font-family:Calibri,sans-serif"></u>=
=C2=A0<u style=3D"font-family:Calibri,sans-serif"></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:Calibri,sans-serif">Fred,<u style=3D"font-family:Calibri,sans-serif"><=
/u><u style=3D"font-family:Calibri,sans-serif"></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:Calibri,sans-serif">I hope you can understand my position as the edito=
r.<u style=3D"font-family:Calibri,sans-serif"></u><u style=3D"font-family:C=
alibri,sans-serif"></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:Calibri,sans-serif"><u style=3D"font-family:Calibri,sans-serif"></u>=
=C2=A0<u style=3D"font-family:Calibri,sans-serif"></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:Calibri,sans-serif">Thanks.<u style=3D"font-family:Calibri,sans-serif"=
></u><u style=3D"font-family:Calibri,sans-serif"></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:Calibri,sans-serif"><u style=3D"font-family:Calibri,sans-serif"></u>=
=C2=A0<u style=3D"font-family:Calibri,sans-serif"></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:Calibri,sans-serif">Best Regards,<u style=3D"font-family:Calibri,sans-=
serif"></u><u style=3D"font-family:Calibri,sans-serif"></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:Calibri,sans-serif">Paul<u style=3D"font-family:Calibri,sans-serif"></=
u><u style=3D"font-family:Calibri,sans-serif"></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:Calibri,sans-serif"><u style=3D"font-family:Calibri,sans-serif"></u>=
=C2=A0<u style=3D"font-family:Calibri,sans-serif"></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:Calibri,sans-serif"><u style=3D"font-family:Calibri,sans-serif"></u>=
=C2=A0<u style=3D"font-family:Calibri,sans-serif"></u></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10pt;font-fa=
mily:Calibri,sans-serif">On Tue, Feb 22, 2022 at 5:26 AM Russ Housley &lt;<=
a href=3D"mailto:housley@vigilsec.com" style=3D"font-family:Calibri,sans-se=
rif" target=3D"_blank">housley@vigilsec.com</a>&gt; wrote:<u style=3D"font-=
family:Calibri,sans-serif"></u><u style=3D"font-family:Calibri,sans-serif">=
</u></span></p>
</div>
<blockquote style=3D"border-style:none none none solid;border-left-width:1p=
t;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt;border-left-color:rgb(20=
4,204,204)">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><span lang=3D"EN-US" st=
yle=3D"font-size:10pt;font-family:Calibri,sans-serif">Paul and Fred:<br>
<br>
I think the update is more aligned with the documents that are advancing on=
e the IETF stream.=C2=A0 That said, I would not be apposed to the inclusion=
 of the 6M&#39;s, but not in a way that claims that there is only one appro=
ach way to address these things.=C2=A0 What do
 you think about that was a way forward?<br>
<br>
Russ<br>
<br>
<br>
&gt; On Feb 21, 2022, at 2:56 PM, Templin (US), Fred L &lt;<a href=3D"mailt=
o:Fred.L.Templin@boeing.com" style=3D"font-family:Calibri,sans-serif" targe=
t=3D"_blank">Fred.L.Templin@boeing.com</a>&gt; wrote:<br>
&gt; <br>
&gt; Hi, I started reviewing this and found that it has been completely ove=
rhauled since I put my<br>
&gt; comments in many months ago. It has in fact been completely rewritten =
to favor the shared<br>
&gt; IPv6 multilink subnet model over multihop networks, to favor RPL/6LowP=
an over standard<br>
&gt; MANET routing protocols, to favor IPv6 ND changes over standard IPv6 N=
D, and to favor<br>
&gt; multilink DAD. None of that is necessary with AERO/OMNI and the NBMA-b=
ased virtual link<br>
&gt; created by the OMNI Adaptation. So, I stopped midway through marking u=
p the document<br>
&gt; with my comments because it has taken a complete left turn and started=
 down a wrong path.<br>
&gt; <br>
&gt; What is mainly at the heart of the divergence is that the document now=
 embraces the<br>
&gt; multilink IPv6 subnet model vs the AERO/OMNI NBMA link model that was =
there the last<br>
&gt; time I looked. But, there is no need for such complication when there =
is a much simpler<br>
&gt; alternative at hand. I notice also that in the appendices the AERO/OMN=
I &quot;6M&#39;s of Mobile<br>
&gt; Internetworking&quot; was removed - at the very least that needs to be=
 restored.<br>
&gt; <br>
&gt; In its current form, this document has been diverted to go down the wr=
ong path. It<br>
&gt; needs to be either re-balanced or re-written.<br>
&gt; <br>
&gt; Thanks - Fred<br>
&gt; <br>
&gt;&gt; -----Original Message-----<br>
&gt;&gt; From: its [mailto:<a href=3D"mailto:its-bounces@ietf.org" style=3D=
"font-family:Calibri,sans-serif" target=3D"_blank">its-bounces@ietf.org</a>=
] On Behalf Of Templin (US), Fred L<br>
&gt;&gt; Sent: Monday, February 21, 2022 7:28 AM<br>
&gt;&gt; To: <a href=3D"mailto:its@ietf.org" style=3D"font-family:Calibri,s=
ans-serif" target=3D"_blank">its@ietf.org</a>; <a href=3D"mailto:i-d-announ=
ce@ietf.org" style=3D"font-family:Calibri,sans-serif" target=3D"_blank">
i-d-announce@ietf.org</a><br>
&gt;&gt; Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-netw=
orking-26.txt<br>
&gt;&gt; <br>
&gt;&gt; Hi, it looks like a lot of what was in the draft regarding AERO/OM=
NI has been cut out<br>
&gt;&gt; so that means I am going to have to re-review it. I will get to th=
is a soon as possible;<br>
&gt;&gt; hopefully in the next couple of days.<br>
&gt;&gt; <br>
&gt;&gt; Fred<br>
&gt;&gt; <br>
&gt;&gt;&gt; -----Original Message-----<br>
&gt;&gt;&gt; From: its [mailto:<a href=3D"mailto:its-bounces@ietf.org" styl=
e=3D"font-family:Calibri,sans-serif" target=3D"_blank">its-bounces@ietf.org=
</a>] On Behalf Of
<a href=3D"mailto:internet-drafts@ietf.org" style=3D"font-family:Calibri,sa=
ns-serif" target=3D"_blank">internet-drafts@ietf.org</a><br>
&gt;&gt;&gt; Sent: Sunday, February 20, 2022 9:00 PM<br>
&gt;&gt;&gt; To: <a href=3D"mailto:i-d-announce@ietf.org" style=3D"font-fam=
ily:Calibri,sans-serif" target=3D"_blank">i-d-announce@ietf.org</a><br>
&gt;&gt;&gt; Cc: <a href=3D"mailto:its@ietf.org" style=3D"font-family:Calib=
ri,sans-serif" target=3D"_blank">its@ietf.org</a><br>
&gt;&gt;&gt; Subject: [EXTERNAL] [ipwave] I-D Action: draft-ietf-ipwave-veh=
icular-networking-26.txt<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; EXT email: be mindful of links/attachments.<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; A New Internet-Draft is available from the on-line Internet-Dr=
afts directories.<br>
&gt;&gt;&gt; This draft is a work item of the IP Wireless Access in Vehicul=
ar Environments WG of the IETF.<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Title=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0: IPv6 Wireless Access in Vehicular Environments (IPWAVE): Pro=
blem Statement and Use Cases<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Author=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 : Jaehoon (Paul) Jeong<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft=
-ietf-ipwave-vehicular-networking-26.txt<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0: 49<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 : 2022-02-20<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; Abstract:<br>
&gt;&gt;&gt;=C2=A0 =C2=A0This document discusses the problem statement and =
use cases of<br>
&gt;&gt;&gt;=C2=A0 =C2=A0IPv6-based vehicular networking for Intelligent Tr=
ansportation<br>
&gt;&gt;&gt;=C2=A0 =C2=A0Systems (ITS).=C2=A0 The main scenarios of vehicul=
ar communications are<br>
&gt;&gt;&gt;=C2=A0 =C2=A0vehicle-to-vehicle (V2V), vehicle-to-infrastructur=
e (V2I), and<br>
&gt;&gt;&gt;=C2=A0 =C2=A0vehicle-to-everything (V2X) communications.=C2=A0 =
First, this document<br>
&gt;&gt;&gt;=C2=A0 =C2=A0explains use cases using V2V, V2I, and V2X network=
ing.=C2=A0 Next, for<br>
&gt;&gt;&gt;=C2=A0 =C2=A0IPv6-based vehicular networks, it makes a gap anal=
ysis of current<br>
&gt;&gt;&gt;=C2=A0 =C2=A0IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mob=
ility Management,<br>
&gt;&gt;&gt;=C2=A0 =C2=A0and Security &amp; Privacy), and then enumerates r=
equirements for the<br>
&gt;&gt;&gt;=C2=A0 =C2=A0extensions of those IPv6 protocols for IPv6-based =
vehicular<br>
&gt;&gt;&gt;=C2=A0 =C2=A0networking.<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; The IETF datatracker status page for this draft is:<br>
&gt;&gt;&gt; <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-ipwave-=
vehicular-networking/" style=3D"font-family:Calibri,sans-serif" target=3D"_=
blank">
https://datatracker.ietf.org/doc/draft-ietf-ipwave-vehicular-networking/</a=
><br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; There is also an htmlized version available at:<br>
&gt;&gt;&gt; <a href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-ip=
wave-vehicular-networking-26" style=3D"font-family:Calibri,sans-serif" targ=
et=3D"_blank">
https://datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-networkin=
g-26</a><br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; A diff from the previous version is available at:<br>
&gt;&gt;&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwa=
ve-vehicular-networking-26" style=3D"font-family:Calibri,sans-serif" target=
=3D"_blank">
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwave-vehicular-networking-=
26</a><br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; Internet-Drafts are also available by rsync at rsync.ietf.org:=
:internet-drafts<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; _______________________________________________<br>
&gt;&gt;&gt; its mailing list<br>
&gt;&gt;&gt; <a href=3D"mailto:its@ietf.org" style=3D"font-family:Calibri,s=
ans-serif" target=3D"_blank">its@ietf.org</a><br>
&gt;&gt;&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/its" style=3D=
"font-family:Calibri,sans-serif" target=3D"_blank">https://www.ietf.org/mai=
lman/listinfo/its</a><br>
&gt;&gt; <br>
&gt;&gt; _______________________________________________<br>
&gt;&gt; its mailing list<br>
&gt;&gt; <a href=3D"mailto:its@ietf.org" style=3D"font-family:Calibri,sans-=
serif" target=3D"_blank">its@ietf.org</a><br>
&gt;&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/its" style=3D"fon=
t-family:Calibri,sans-serif" target=3D"_blank">https://www.ietf.org/mailman=
/listinfo/its</a><br>
&gt; <br>
&gt; _______________________________________________<br>
&gt; its mailing list<br>
&gt; <a href=3D"mailto:its@ietf.org" style=3D"font-family:Calibri,sans-seri=
f" target=3D"_blank">its@ietf.org</a><br>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/its" style=3D"font-fa=
mily:Calibri,sans-serif" target=3D"_blank">https://www.ietf.org/mailman/lis=
tinfo/its</a><u style=3D"font-family:Calibri,sans-serif"></u><u style=3D"fo=
nt-family:Calibri,sans-serif"></u></span></p>
</blockquote>
</div>
</div>
</div>
</div>

</blockquote></div></div>
</div>-- <br><div dir=3D"ltr" class=3D"gmail_signature" data-smartmail=3D"g=
mail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><div><div dir=3D"ltr=
"><div><div dir=3D"ltr">=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>Mr. Jaehoon (Paul) Jeong, Ph.D.<br>Associ=
ate Professor</div><div dir=3D"ltr">Department Head<br>Department of Comput=
er Science and Engineering<br>Sungkyunkwan University<br>Office: +82-31-299=
-4957<br>Email: <a href=3D"mailto:pauljeong@skku.edu" style=3D"font-size:12=
.8px" target=3D"_blank">pauljeong@skku.edu</a>,=C2=A0<a href=3D"mailto:jaeh=
oon.paul@gmail.com" target=3D"_blank">jaehoon.paul@gmail.com</a><br>Persona=
l Homepage: <a href=3D"http://cpslab.skku.edu/people-jaehoon-jeong.php" tar=
get=3D"_blank">http://iotlab.skku.edu/people-jaehoon-jeong.php</a><br></div=
></div></div></div></div></div></div></div>

--0000000000007bf41a05d8a2c11a--


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Subject: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-27.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IP Wireless Access in Vehicular Environments WG of the IETF.

        Title           : IPv6 Wireless Access in Vehicular Environments (IPWAVE): Problem Statement and Use Cases
        Author          : Jaehoon (Paul) Jeong
	Filename        : draft-ietf-ipwave-vehicular-networking-27.txt
	Pages           : 50
	Date            : 2022-02-22

Abstract:
   This document discusses the problem statement and use cases of
   IPv6-based vehicular networking for Intelligent Transportation
   Systems (ITS).  The main scenarios of vehicular communications are
   vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and
   vehicle-to-everything (V2X) communications.  First, this document
   explains use cases using V2V, V2I, and V2X networking.  Next, for
   IPv6-based vehicular networks, it makes a gap analysis of current
   IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mobility Management,
   and Security & Privacy), and then enumerates requirements for the
   extensions of those IPv6 protocols for IPv6-based vehicular
   networking.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-ipwave-vehicular-networking/

There is also an htmlized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-networking-27

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-ipwave-vehicular-networking-27


Internet-Drafts are also available by rsync at rsync.ietf.org::internet-drafts



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Cc: "Dirk.von-Hugo@telekom.de" <Dirk.von-Hugo@telekom.de>,  "jaehoon.paul@gmail.com" <jaehoon.paul@gmail.com>, "housley@vigilsec.com" <housley@vigilsec.com>,  "its@ietf.org" <its@ietf.org>, "Pascal Thubert (pthubert)" <pthubert@cisco.com>
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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The inclusion of the OMNI stuff was highlihgted during the LC, and I agreed
to advance draft 25 to the IESG telechat.

Now I have to re-review draft 27.  I don't know what's changed, but, in
general, please avoid major surgery between IETF LC and IESG telechat.  We
might need to pull draft 27 back for a 2nd LC.

/me goes to have a look and the diff...

On Tue, Feb 22, 2022 at 7:58 AM Templin (US), Fred L <
Fred.L.Templin@boeing.com> wrote:

> Doesn=E2=80=99t work, Dirk. Several months ago, Paul took my edits and th=
e
> document looked
>
> good. Then, someone came in later without my knowing about it and said
> =E2=80=9Ctake out
>
> all of the AERO/OMNI stuff=E2=80=9D, and no one told me about it. This is=
 no
> longer a balanced
>
> document; this is a document that embraces a particular solution
> alternative while
>
> ignoring another.
>
>
>
> You and I had a testy exchange earlier; if your message is a continuation
> of that
>
> exchange I can tell you that I do not appreciate it.
>
>
>
> Fred
>
>
>
> *From:* Dirk.von-Hugo@telekom.de [mailto:Dirk.von-Hugo@telekom.de]
> *Sent:* Tuesday, February 22, 2022 7:46 AM
> *To:* Templin (US), Fred L <Fred.L.Templin@boeing.com>;
> jaehoon.paul@gmail.com; housley@vigilsec.com
> *Cc:* its@ietf.org
> *Subject:* [EXTERNAL] AW: [ipwave] I-D Action:
> draft-ietf-ipwave-vehicular-networking-26.txt
>
>
>
> EXT email: be mindful of links/attachments.
>
>
>
>
> Dear Fred, Paul, Russ and all,
>
> From my point of view - only loosely following this discussion - I do
> agree that Paul has achieved a good balance between different protocols
> included/mentioned. Thanks for that!
>
>
>
> Just a small typo: on page 3 it should also read
>
> =E2=80=98Automatic Extended Route Optimization (AERO)=E2=80=99 instead of=
 =E2=80=98Asymmetric
> Extended Route Optimization (AERO)=E2=80=99
>
> And maybe one could add on p. 14 the sentence
>
> =E2=80=98Refer to Appendix A for the description how OMNI can support use=
 of
> multiple radio technologies in V2X=E2=80=99.
>
>
>
> Would that help? What do you think?
>
> Thanks
>
> Best regards
>
> Dirk
>
>
>
>
>
> *Von:* its <its-bounces@ietf.org> *Im Auftrag von *Templin (US), Fred L
> *Gesendet:* Dienstag, 22. Februar 2022 15:35
> *An:* Mr. Jaehoon Paul Jeong <jaehoon.paul@gmail.com>; Russ Housley <
> housley@vigilsec.com>
> *Cc:* its@ietf.org
> *Betreff:* Re: [ipwave] I-D Action:
> draft-ietf-ipwave-vehicular-networking-26.txt
>
>
>
> The way the document is now, it reads as an endorsement for a particular
> approach.
>
> The document was good last time I read it (which is a while ago) but I
> guess someone
>
> got you to make drastic changes without my knowing about it. The document
> cannot
>
> go forward in its current form.
>
>
>
> Fred
>
>
>
> *From:* Mr. Jaehoon Paul Jeong [mailto:jaehoon.paul@gmail.com
> <jaehoon.paul@gmail.com>]
> *Sent:* Monday, February 21, 2022 7:50 PM
> *To:* Russ Housley <housley@vigilsec.com>; Templin (US), Fred L <
> Fred.L.Templin@boeing.com>
> *Cc:* its@ietf.org; Mr. Jaehoon Paul Jeong <jaehoon.paul@gmail.com>
> *Subject:* [EXTERNAL] Re: [ipwave] I-D Action:
> draft-ietf-ipwave-vehicular-networking-26.txt
>
>
>
> EXT email: be mindful of links/attachments.
>
>
>
>
> Hi Russ,
>
> I have replied to Fred's email just before.
>
> As the editor, I tried to balance the two approaches even though the text
> of AERO/OMNI is reduced.
>
>
>
> Fred,
>
> I hope you can understand my position as the editor.
>
>
>
> Thanks.
>
>
>
> Best Regards,
>
> Paul
>
>
>
>
>
> On Tue, Feb 22, 2022 at 5:26 AM Russ Housley <housley@vigilsec.com> wrote=
:
>
> Paul and Fred:
>
> I think the update is more aligned with the documents that are advancing
> one the IETF stream.  That said, I would not be apposed to the inclusion =
of
> the 6M's, but not in a way that claims that there is only one approach wa=
y
> to address these things.  What do you think about that was a way forward?
>
> Russ
>
>
> > On Feb 21, 2022, at 2:56 PM, Templin (US), Fred L <
> Fred.L.Templin@boeing.com> wrote:
> >
> > Hi, I started reviewing this and found that it has been completely
> overhauled since I put my
> > comments in many months ago. It has in fact been completely rewritten t=
o
> favor the shared
> > IPv6 multilink subnet model over multihop networks, to favor RPL/6LowPa=
n
> over standard
> > MANET routing protocols, to favor IPv6 ND changes over standard IPv6 ND=
,
> and to favor
> > multilink DAD. None of that is necessary with AERO/OMNI and the
> NBMA-based virtual link
> > created by the OMNI Adaptation. So, I stopped midway through marking up
> the document
> > with my comments because it has taken a complete left turn and started
> down a wrong path.
> >
> > What is mainly at the heart of the divergence is that the document now
> embraces the
> > multilink IPv6 subnet model vs the AERO/OMNI NBMA link model that was
> there the last
> > time I looked. But, there is no need for such complication when there i=
s
> a much simpler
> > alternative at hand. I notice also that in the appendices the AERO/OMNI
> "6M's of Mobile
> > Internetworking" was removed - at the very least that needs to be
> restored.
> >
> > In its current form, this document has been diverted to go down the
> wrong path. It
> > needs to be either re-balanced or re-written.
> >
> > Thanks - Fred
> >
> >> -----Original Message-----
> >> From: its [mailto:its-bounces@ietf.org] On Behalf Of Templin (US),
> Fred L
> >> Sent: Monday, February 21, 2022 7:28 AM
> >> To: its@ietf.org; i-d-announce@ietf.org
> >> Subject: Re: [ipwave] I-D Action:
> draft-ietf-ipwave-vehicular-networking-26.txt
> >>
> >> Hi, it looks like a lot of what was in the draft regarding AERO/OMNI
> has been cut out
> >> so that means I am going to have to re-review it. I will get to this a
> soon as possible;
> >> hopefully in the next couple of days.
> >>
> >> Fred
> >>
> >>> -----Original Message-----
> >>> From: its [mailto:its-bounces@ietf.org] On Behalf Of
> internet-drafts@ietf.org
> >>> Sent: Sunday, February 20, 2022 9:00 PM
> >>> To: i-d-announce@ietf.org
> >>> Cc: its@ietf.org
> >>> Subject: [EXTERNAL] [ipwave] I-D Action:
> draft-ietf-ipwave-vehicular-networking-26.txt
> >>>
> >>> EXT email: be mindful of links/attachments.
> >>>
> >>>
> >>>
> >>>
> >>> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> >>> This draft is a work item of the IP Wireless Access in Vehicular
> Environments WG of the IETF.
> >>>
> >>>        Title           : IPv6 Wireless Access in Vehicular
> Environments (IPWAVE): Problem Statement and Use Cases
> >>>        Author          : Jaehoon (Paul) Jeong
> >>>     Filename        : draft-ietf-ipwave-vehicular-networking-26.txt
> >>>     Pages           : 49
> >>>     Date            : 2022-02-20
> >>>
> >>> Abstract:
> >>>   This document discusses the problem statement and use cases of
> >>>   IPv6-based vehicular networking for Intelligent Transportation
> >>>   Systems (ITS).  The main scenarios of vehicular communications are
> >>>   vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and
> >>>   vehicle-to-everything (V2X) communications.  First, this document
> >>>   explains use cases using V2V, V2I, and V2X networking.  Next, for
> >>>   IPv6-based vehicular networks, it makes a gap analysis of current
> >>>   IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mobility Management,
> >>>   and Security & Privacy), and then enumerates requirements for the
> >>>   extensions of those IPv6 protocols for IPv6-based vehicular
> >>>   networking.
> >>>
> >>>
> >>> The IETF datatracker status page for this draft is:
> >>>
> https://datatracker.ietf.org/doc/draft-ietf-ipwave-vehicular-networking/
> >>>
> >>> There is also an htmlized version available at:
> >>>
> https://datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-network=
ing-26
> >>>
> >>> A diff from the previous version is available at:
> >>>
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwave-vehicular-networkin=
g-26
> >>>
> >>>
> >>> Internet-Drafts are also available by rsync at rsync.ietf.org:
> :internet-drafts
> >>>
> >>>
> >>> _______________________________________________
> >>> its mailing list
> >>> its@ietf.org
> >>> https://www.ietf.org/mailman/listinfo/its
> >>
> >> _______________________________________________
> >> its mailing list
> >> its@ietf.org
> >> https://www.ietf.org/mailman/listinfo/its
> >
> > _______________________________________________
> > its mailing list
> > its@ietf.org
> > https://www.ietf.org/mailman/listinfo/its
>
> _______________________________________________
> its mailing list
> its@ietf.org
> https://www.ietf.org/mailman/listinfo/its
>

--0000000000001285dc05d8a97ea3
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<div dir=3D"ltr">The inclusion of the OMNI stuff was highlihgted during the=
 LC, and I agreed to advance draft 25 to the IESG telechat.<div><br></div><=
div>Now I have to re-review draft 27.=C2=A0 I don&#39;t know what&#39;s cha=
nged, but, in general, please avoid major surgery between IETF LC and IESG =
telechat.=C2=A0 We might need to pull draft 27 back for a 2nd LC.</div><div=
><br></div><div>/me goes to have a look and the diff...</div></div><br><div=
 class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Feb 22=
, 2022 at 7:58 AM Templin (US), Fred L &lt;<a href=3D"mailto:Fred.L.Templin=
@boeing.com">Fred.L.Templin@boeing.com</a>&gt; wrote:<br></div><blockquote =
class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px sol=
id rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US">
<div class=3D"gmail-m_2216039281906023243WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Doesn=E2=80=99t work, Dirk. Several months a=
go, Paul took my edits and the document looked<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">good. Then, someone came in later without my=
 knowing about it and said =E2=80=9Ctake out<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">all of the AERO/OMNI stuff=E2=80=9D, and no =
one told me about it. This is no longer a balanced<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">document; this is a document that embraces a=
 particular solution alternative while<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">ignoring another.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">You and I had a testy exchange earlier; if y=
our message is a continuation of that<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">exchange I can tell you that I do not apprec=
iate it.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Fred<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11pt;font-family:Calibri=
,sans-serif">From:</span></b><span style=3D"font-size:11pt;font-family:Cali=
bri,sans-serif"> <a href=3D"mailto:Dirk.von-Hugo@telekom.de" target=3D"_bla=
nk">Dirk.von-Hugo@telekom.de</a> [mailto:<a href=3D"mailto:Dirk.von-Hugo@te=
lekom.de" target=3D"_blank">Dirk.von-Hugo@telekom.de</a>]
<br>
<b>Sent:</b> Tuesday, February 22, 2022 7:46 AM<br>
<b>To:</b> Templin (US), Fred L &lt;<a href=3D"mailto:Fred.L.Templin@boeing=
.com" target=3D"_blank">Fred.L.Templin@boeing.com</a>&gt;; <a href=3D"mailt=
o:jaehoon.paul@gmail.com" target=3D"_blank">jaehoon.paul@gmail.com</a>; <a =
href=3D"mailto:housley@vigilsec.com" target=3D"_blank">housley@vigilsec.com=
</a><br>
<b>Cc:</b> <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</=
a><br>
<b>Subject:</b> [EXTERNAL] AW: [ipwave] I-D Action: draft-ietf-ipwave-vehic=
ular-networking-26.txt<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<table border=3D"0" cellspacing=3D"3" cellpadding=3D"0" width=3D"100%" styl=
e=3D"width:100%">
<tbody>
<tr>
<td style=3D"background:white;padding:0.75pt">
<table border=3D"0" cellspacing=3D"0" cellpadding=3D"0" align=3D"left" widt=
h=3D"100%" style=3D"width:100%;margin-left:0.75pt;margin-right:0.75pt">
<tbody>
<tr>
<td style=3D"background:rgb(145,10,25);padding:5.25pt 1.5pt"></td>
<td width=3D"100%" style=3D"width:100%;background:rgb(253,242,244);padding:=
5.25pt 3.75pt 5.25pt 11.25pt">
<div>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:Verdana,sans-serif;color:rgb(33,3=
3,33)">EXT email: be mindful of links/attachments.</span><u></u><u></u></p>
</div>
</td>
</tr>
</tbody>
</table>
<pre><span style=3D"color:black"><br>=C2=A0<u></u><u></u></span></pre>
</td>
</tr>
</tbody>
</table>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">Dear Fred, Paul, Russ and all,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">From my point of view - only loosely following this discussion - =
I do agree that Paul has achieved a good balance between different protocol=
s included/mentioned. Thanks for
 that!<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">Just a small typo: on page 3 it should also read
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">=E2=80=98Automatic Extended Route Optimization (AERO)=E2=80=99 in=
stead of =E2=80=98Asymmetric Extended Route Optimization (AERO)=E2=80=99<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">And maybe one could add on p. 14 the sentence<u></u><u></u></span=
></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span style=3D"font-siz=
e:11pt;font-family:Calibri,sans-serif">=E2=80=98Refer to Appendix A for the=
 description how OMNI can support use of multiple radio technologies in V2X=
=E2=80=99.<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span style=3D"font-siz=
e:11pt;font-family:Calibri,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span style=3D"font-siz=
e:11pt;font-family:Calibri,sans-serif">Would that help? What do you think?<=
u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span style=3D"font-siz=
e:11pt;font-family:Calibri,sans-serif">Thanks<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"DE" style=3D"font-size:11pt;font-famil=
y:Calibri,sans-serif">Best regards<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"DE" style=3D"font-size:11pt;font-famil=
y:Calibri,sans-serif">Dirk<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"DE" style=3D"font-size:11pt;font-famil=
y:Calibri,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><u></u>=C2=A0<u></u></p=
>
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b><span lang=3D"DE" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif">Von:</span></b><span lang=3D"DE" style=3D"font-siz=
e:11pt;font-family:Calibri,sans-serif"> its &lt;<a href=3D"mailto:its-bounc=
es@ietf.org" target=3D"_blank">its-bounces@ietf.org</a>&gt;
<b>Im Auftrag von </b>Templin (US), Fred L<br>
<b>Gesendet:</b> Dienstag, 22. Februar 2022 15:35<br>
<b>An:</b> Mr. Jaehoon Paul Jeong &lt;<a href=3D"mailto:jaehoon.paul@gmail.=
com" target=3D"_blank">jaehoon.paul@gmail.com</a>&gt;; Russ Housley &lt;<a =
href=3D"mailto:housley@vigilsec.com" target=3D"_blank">housley@vigilsec.com=
</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</=
a><br>
<b>Betreff:</b> Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networ=
king-26.txt<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"DE"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">The way the document is now, it reads as an =
endorsement for a particular approach.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">The document was good last time I read it (w=
hich is a while ago) but I guess someone<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">got you to make drastic changes without my k=
nowing about it. The document cannot<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">go forward in its current form.<u></u><u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Fred<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border-top:none;border-right:none;border-bottom:none;border-l=
eft:1.5pt solid blue;padding:0in 0in 0in 4pt">
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11pt;font-family:Calibri=
,sans-serif">From:</span></b><span style=3D"font-size:11pt;font-family:Cali=
bri,sans-serif"> Mr. Jaehoon Paul Jeong [<a href=3D"mailto:jaehoon.paul@gma=
il.com" target=3D"_blank">mailto:jaehoon.paul@gmail.com</a>]
<br>
<b>Sent:</b> Monday, February 21, 2022 7:50 PM<br>
<b>To:</b> Russ Housley &lt;<a href=3D"mailto:housley@vigilsec.com" target=
=3D"_blank">housley@vigilsec.com</a>&gt;; Templin (US), Fred L &lt;<a href=
=3D"mailto:Fred.L.Templin@boeing.com" target=3D"_blank">Fred.L.Templin@boei=
ng.com</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</=
a>; Mr. Jaehoon Paul Jeong &lt;<a href=3D"mailto:jaehoon.paul@gmail.com" ta=
rget=3D"_blank">jaehoon.paul@gmail.com</a>&gt;<br>
<b>Subject:</b> [EXTERNAL] Re: [ipwave] I-D Action: draft-ietf-ipwave-vehic=
ular-networking-26.txt<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<table border=3D"0" cellspacing=3D"3" cellpadding=3D"0" width=3D"100%" styl=
e=3D"width:100%">
<tbody>
<tr>
<td style=3D"background:white;padding:0.75pt">
<table border=3D"0" cellspacing=3D"0" cellpadding=3D"0" align=3D"left" widt=
h=3D"100%" style=3D"width:100%;margin-left:0.75pt;margin-right:0.75pt">
<tbody>
<tr>
<td style=3D"background:rgb(145,10,25);padding:5.25pt 1.5pt"></td>
<td width=3D"100%" style=3D"width:100%;background:rgb(253,242,244);padding:=
5.25pt 3.75pt 5.25pt 11.25pt">
<div>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:Verdana,sans-serif;color:rgb(33,3=
3,33)">EXT email: be mindful of links/attachments.</span><u></u><u></u></p>
</div>
</td>
</tr>
</tbody>
</table>
<pre><span style=3D"color:black"><br>=C2=A0<u></u><u></u></span></pre>
</td>
</tr>
</tbody>
</table>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">Hi Russ,<u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">I have replied to Fred&#39;s email just before.<u></u><u></u></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">As the editor, I tried to balance the two approaches even though =
the text of AERO/OMNI is reduced.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">Fred,<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">I hope you can understand my position as the editor.<u></u><u></u=
></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">Thanks.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">Best Regards,<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">Paul<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">On Tue, Feb 22, 2022 at 5:26 AM Russ Housley &lt;<a href=3D"mailt=
o:housley@vigilsec.com" target=3D"_blank">housley@vigilsec.com</a>&gt; wrot=
e:<u></u><u></u></span></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin:5pt 0i=
n 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><span style=3D"font-siz=
e:10pt;font-family:Calibri,sans-serif">Paul and Fred:<br>
<br>
I think the update is more aligned with the documents that are advancing on=
e the IETF stream.=C2=A0 That said, I would not be apposed to the inclusion=
 of the 6M&#39;s, but not in a way that claims that there is only one appro=
ach way to address these things.=C2=A0 What do
 you think about that was a way forward?<br>
<br>
Russ<br>
<br>
<br>
&gt; On Feb 21, 2022, at 2:56 PM, Templin (US), Fred L &lt;<a href=3D"mailt=
o:Fred.L.Templin@boeing.com" target=3D"_blank">Fred.L.Templin@boeing.com</a=
>&gt; wrote:<br>
&gt; <br>
&gt; Hi, I started reviewing this and found that it has been completely ove=
rhauled since I put my<br>
&gt; comments in many months ago. It has in fact been completely rewritten =
to favor the shared<br>
&gt; IPv6 multilink subnet model over multihop networks, to favor RPL/6LowP=
an over standard<br>
&gt; MANET routing protocols, to favor IPv6 ND changes over standard IPv6 N=
D, and to favor<br>
&gt; multilink DAD. None of that is necessary with AERO/OMNI and the NBMA-b=
ased virtual link<br>
&gt; created by the OMNI Adaptation. So, I stopped midway through marking u=
p the document<br>
&gt; with my comments because it has taken a complete left turn and started=
 down a wrong path.<br>
&gt; <br>
&gt; What is mainly at the heart of the divergence is that the document now=
 embraces the<br>
&gt; multilink IPv6 subnet model vs the AERO/OMNI NBMA link model that was =
there the last<br>
&gt; time I looked. But, there is no need for such complication when there =
is a much simpler<br>
&gt; alternative at hand. I notice also that in the appendices the AERO/OMN=
I &quot;6M&#39;s of Mobile<br>
&gt; Internetworking&quot; was removed - at the very least that needs to be=
 restored.<br>
&gt; <br>
&gt; In its current form, this document has been diverted to go down the wr=
ong path. It<br>
&gt; needs to be either re-balanced or re-written.<br>
&gt; <br>
&gt; Thanks - Fred<br>
&gt; <br>
&gt;&gt; -----Original Message-----<br>
&gt;&gt; From: its [mailto:<a href=3D"mailto:its-bounces@ietf.org" target=
=3D"_blank">its-bounces@ietf.org</a>] On Behalf Of Templin (US), Fred L<br>
&gt;&gt; Sent: Monday, February 21, 2022 7:28 AM<br>
&gt;&gt; To: <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org=
</a>; <a href=3D"mailto:i-d-announce@ietf.org" target=3D"_blank">
i-d-announce@ietf.org</a><br>
&gt;&gt; Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-netw=
orking-26.txt<br>
&gt;&gt; <br>
&gt;&gt; Hi, it looks like a lot of what was in the draft regarding AERO/OM=
NI has been cut out<br>
&gt;&gt; so that means I am going to have to re-review it. I will get to th=
is a soon as possible;<br>
&gt;&gt; hopefully in the next couple of days.<br>
&gt;&gt; <br>
&gt;&gt; Fred<br>
&gt;&gt; <br>
&gt;&gt;&gt; -----Original Message-----<br>
&gt;&gt;&gt; From: its [mailto:<a href=3D"mailto:its-bounces@ietf.org" targ=
et=3D"_blank">its-bounces@ietf.org</a>] On Behalf Of
<a href=3D"mailto:internet-drafts@ietf.org" target=3D"_blank">internet-draf=
ts@ietf.org</a><br>
&gt;&gt;&gt; Sent: Sunday, February 20, 2022 9:00 PM<br>
&gt;&gt;&gt; To: <a href=3D"mailto:i-d-announce@ietf.org" target=3D"_blank"=
>i-d-announce@ietf.org</a><br>
&gt;&gt;&gt; Cc: <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf=
.org</a><br>
&gt;&gt;&gt; Subject: [EXTERNAL] [ipwave] I-D Action: draft-ietf-ipwave-veh=
icular-networking-26.txt<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; EXT email: be mindful of links/attachments.<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; A New Internet-Draft is available from the on-line Internet-Dr=
afts directories.<br>
&gt;&gt;&gt; This draft is a work item of the IP Wireless Access in Vehicul=
ar Environments WG of the IETF.<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Title=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0: IPv6 Wireless Access in Vehicular Environments (IPWAVE): Pro=
blem Statement and Use Cases<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Author=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 : Jaehoon (Paul) Jeong<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft=
-ietf-ipwave-vehicular-networking-26.txt<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0: 49<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 : 2022-02-20<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; Abstract:<br>
&gt;&gt;&gt;=C2=A0 =C2=A0This document discusses the problem statement and =
use cases of<br>
&gt;&gt;&gt;=C2=A0 =C2=A0IPv6-based vehicular networking for Intelligent Tr=
ansportation<br>
&gt;&gt;&gt;=C2=A0 =C2=A0Systems (ITS).=C2=A0 The main scenarios of vehicul=
ar communications are<br>
&gt;&gt;&gt;=C2=A0 =C2=A0vehicle-to-vehicle (V2V), vehicle-to-infrastructur=
e (V2I), and<br>
&gt;&gt;&gt;=C2=A0 =C2=A0vehicle-to-everything (V2X) communications.=C2=A0 =
First, this document<br>
&gt;&gt;&gt;=C2=A0 =C2=A0explains use cases using V2V, V2I, and V2X network=
ing.=C2=A0 Next, for<br>
&gt;&gt;&gt;=C2=A0 =C2=A0IPv6-based vehicular networks, it makes a gap anal=
ysis of current<br>
&gt;&gt;&gt;=C2=A0 =C2=A0IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mob=
ility Management,<br>
&gt;&gt;&gt;=C2=A0 =C2=A0and Security &amp; Privacy), and then enumerates r=
equirements for the<br>
&gt;&gt;&gt;=C2=A0 =C2=A0extensions of those IPv6 protocols for IPv6-based =
vehicular<br>
&gt;&gt;&gt;=C2=A0 =C2=A0networking.<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; The IETF datatracker status page for this draft is:<br>
&gt;&gt;&gt; <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-ipwave-=
vehicular-networking/" target=3D"_blank">
https://datatracker.ietf.org/doc/draft-ietf-ipwave-vehicular-networking/</a=
><br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; There is also an htmlized version available at:<br>
&gt;&gt;&gt; <a href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-ip=
wave-vehicular-networking-26" target=3D"_blank">
https://datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-networkin=
g-26</a><br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; A diff from the previous version is available at:<br>
&gt;&gt;&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwa=
ve-vehicular-networking-26" target=3D"_blank">
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwave-vehicular-networking-=
26</a><br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; Internet-Drafts are also available by rsync at rsync.ietf.org:=
:internet-drafts<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; _______________________________________________<br>
&gt;&gt;&gt; its mailing list<br>
&gt;&gt;&gt; <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org=
</a><br>
&gt;&gt;&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/its" target=
=3D"_blank">https://www.ietf.org/mailman/listinfo/its</a><br>
&gt;&gt; <br>
&gt;&gt; _______________________________________________<br>
&gt;&gt; its mailing list<br>
&gt;&gt; <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</a>=
<br>
&gt;&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/its" target=3D"_b=
lank">https://www.ietf.org/mailman/listinfo/its</a><br>
&gt; <br>
&gt; _______________________________________________<br>
&gt; its mailing list<br>
&gt; <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</a><br>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/its" target=3D"_blank=
">https://www.ietf.org/mailman/listinfo/its</a><u></u><u></u></span></p>
</blockquote>
</div>
</div>
</div>
</div>

_______________________________________________<br>
its mailing list<br>
<a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</a><br>
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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I apologize; I see now the diff is small.  I was terribly afraid that the
fast-rev'ing version numbers meant lots of text was in flight (as opposed
to just being held for fixing small things during incorporation of IESG
feedback).

Russ, Carlos,

If you think this document is not ready for the IESG telechat let me know
and I'll pull it back so it can get some more rounds of consideration.  For
now I'm inclined to let it stay.

Thanks, and apologies,
-Erik

On Tue, Feb 22, 2022 at 10:22 PM Erik Kline <ek.ietf@gmail.com> wrote:

> The inclusion of the OMNI stuff was highlihgted during the LC, and I
> agreed to advance draft 25 to the IESG telechat.
>
> Now I have to re-review draft 27.  I don't know what's changed, but, in
> general, please avoid major surgery between IETF LC and IESG telechat.  W=
e
> might need to pull draft 27 back for a 2nd LC.
>
> /me goes to have a look and the diff...
>
> On Tue, Feb 22, 2022 at 7:58 AM Templin (US), Fred L <
> Fred.L.Templin@boeing.com> wrote:
>
>> Doesn=E2=80=99t work, Dirk. Several months ago, Paul took my edits and t=
he
>> document looked
>>
>> good. Then, someone came in later without my knowing about it and said
>> =E2=80=9Ctake out
>>
>> all of the AERO/OMNI stuff=E2=80=9D, and no one told me about it. This i=
s no
>> longer a balanced
>>
>> document; this is a document that embraces a particular solution
>> alternative while
>>
>> ignoring another.
>>
>>
>>
>> You and I had a testy exchange earlier; if your message is a continuatio=
n
>> of that
>>
>> exchange I can tell you that I do not appreciate it.
>>
>>
>>
>> Fred
>>
>>
>>
>> *From:* Dirk.von-Hugo@telekom.de [mailto:Dirk.von-Hugo@telekom.de]
>> *Sent:* Tuesday, February 22, 2022 7:46 AM
>> *To:* Templin (US), Fred L <Fred.L.Templin@boeing.com>;
>> jaehoon.paul@gmail.com; housley@vigilsec.com
>> *Cc:* its@ietf.org
>> *Subject:* [EXTERNAL] AW: [ipwave] I-D Action:
>> draft-ietf-ipwave-vehicular-networking-26.txt
>>
>>
>>
>> EXT email: be mindful of links/attachments.
>>
>>
>>
>>
>> Dear Fred, Paul, Russ and all,
>>
>> From my point of view - only loosely following this discussion - I do
>> agree that Paul has achieved a good balance between different protocols
>> included/mentioned. Thanks for that!
>>
>>
>>
>> Just a small typo: on page 3 it should also read
>>
>> =E2=80=98Automatic Extended Route Optimization (AERO)=E2=80=99 instead o=
f =E2=80=98Asymmetric
>> Extended Route Optimization (AERO)=E2=80=99
>>
>> And maybe one could add on p. 14 the sentence
>>
>> =E2=80=98Refer to Appendix A for the description how OMNI can support us=
e of
>> multiple radio technologies in V2X=E2=80=99.
>>
>>
>>
>> Would that help? What do you think?
>>
>> Thanks
>>
>> Best regards
>>
>> Dirk
>>
>>
>>
>>
>>
>> *Von:* its <its-bounces@ietf.org> *Im Auftrag von *Templin (US), Fred L
>> *Gesendet:* Dienstag, 22. Februar 2022 15:35
>> *An:* Mr. Jaehoon Paul Jeong <jaehoon.paul@gmail.com>; Russ Housley <
>> housley@vigilsec.com>
>> *Cc:* its@ietf.org
>> *Betreff:* Re: [ipwave] I-D Action:
>> draft-ietf-ipwave-vehicular-networking-26.txt
>>
>>
>>
>> The way the document is now, it reads as an endorsement for a particular
>> approach.
>>
>> The document was good last time I read it (which is a while ago) but I
>> guess someone
>>
>> got you to make drastic changes without my knowing about it. The documen=
t
>> cannot
>>
>> go forward in its current form.
>>
>>
>>
>> Fred
>>
>>
>>
>> *From:* Mr. Jaehoon Paul Jeong [mailto:jaehoon.paul@gmail.com
>> <jaehoon.paul@gmail.com>]
>> *Sent:* Monday, February 21, 2022 7:50 PM
>> *To:* Russ Housley <housley@vigilsec.com>; Templin (US), Fred L <
>> Fred.L.Templin@boeing.com>
>> *Cc:* its@ietf.org; Mr. Jaehoon Paul Jeong <jaehoon.paul@gmail.com>
>> *Subject:* [EXTERNAL] Re: [ipwave] I-D Action:
>> draft-ietf-ipwave-vehicular-networking-26.txt
>>
>>
>>
>> EXT email: be mindful of links/attachments.
>>
>>
>>
>>
>> Hi Russ,
>>
>> I have replied to Fred's email just before.
>>
>> As the editor, I tried to balance the two approaches even though the tex=
t
>> of AERO/OMNI is reduced.
>>
>>
>>
>> Fred,
>>
>> I hope you can understand my position as the editor.
>>
>>
>>
>> Thanks.
>>
>>
>>
>> Best Regards,
>>
>> Paul
>>
>>
>>
>>
>>
>> On Tue, Feb 22, 2022 at 5:26 AM Russ Housley <housley@vigilsec.com>
>> wrote:
>>
>> Paul and Fred:
>>
>> I think the update is more aligned with the documents that are advancing
>> one the IETF stream.  That said, I would not be apposed to the inclusion=
 of
>> the 6M's, but not in a way that claims that there is only one approach w=
ay
>> to address these things.  What do you think about that was a way forward=
?
>>
>> Russ
>>
>>
>> > On Feb 21, 2022, at 2:56 PM, Templin (US), Fred L <
>> Fred.L.Templin@boeing.com> wrote:
>> >
>> > Hi, I started reviewing this and found that it has been completely
>> overhauled since I put my
>> > comments in many months ago. It has in fact been completely rewritten
>> to favor the shared
>> > IPv6 multilink subnet model over multihop networks, to favor
>> RPL/6LowPan over standard
>> > MANET routing protocols, to favor IPv6 ND changes over standard IPv6
>> ND, and to favor
>> > multilink DAD. None of that is necessary with AERO/OMNI and the
>> NBMA-based virtual link
>> > created by the OMNI Adaptation. So, I stopped midway through marking u=
p
>> the document
>> > with my comments because it has taken a complete left turn and started
>> down a wrong path.
>> >
>> > What is mainly at the heart of the divergence is that the document now
>> embraces the
>> > multilink IPv6 subnet model vs the AERO/OMNI NBMA link model that was
>> there the last
>> > time I looked. But, there is no need for such complication when there
>> is a much simpler
>> > alternative at hand. I notice also that in the appendices the AERO/OMN=
I
>> "6M's of Mobile
>> > Internetworking" was removed - at the very least that needs to be
>> restored.
>> >
>> > In its current form, this document has been diverted to go down the
>> wrong path. It
>> > needs to be either re-balanced or re-written.
>> >
>> > Thanks - Fred
>> >
>> >> -----Original Message-----
>> >> From: its [mailto:its-bounces@ietf.org] On Behalf Of Templin (US),
>> Fred L
>> >> Sent: Monday, February 21, 2022 7:28 AM
>> >> To: its@ietf.org; i-d-announce@ietf.org
>> >> Subject: Re: [ipwave] I-D Action:
>> draft-ietf-ipwave-vehicular-networking-26.txt
>> >>
>> >> Hi, it looks like a lot of what was in the draft regarding AERO/OMNI
>> has been cut out
>> >> so that means I am going to have to re-review it. I will get to this =
a
>> soon as possible;
>> >> hopefully in the next couple of days.
>> >>
>> >> Fred
>> >>
>> >>> -----Original Message-----
>> >>> From: its [mailto:its-bounces@ietf.org] On Behalf Of
>> internet-drafts@ietf.org
>> >>> Sent: Sunday, February 20, 2022 9:00 PM
>> >>> To: i-d-announce@ietf.org
>> >>> Cc: its@ietf.org
>> >>> Subject: [EXTERNAL] [ipwave] I-D Action:
>> draft-ietf-ipwave-vehicular-networking-26.txt
>> >>>
>> >>> EXT email: be mindful of links/attachments.
>> >>>
>> >>>
>> >>>
>> >>>
>> >>> A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>> >>> This draft is a work item of the IP Wireless Access in Vehicular
>> Environments WG of the IETF.
>> >>>
>> >>>        Title           : IPv6 Wireless Access in Vehicular
>> Environments (IPWAVE): Problem Statement and Use Cases
>> >>>        Author          : Jaehoon (Paul) Jeong
>> >>>     Filename        : draft-ietf-ipwave-vehicular-networking-26.txt
>> >>>     Pages           : 49
>> >>>     Date            : 2022-02-20
>> >>>
>> >>> Abstract:
>> >>>   This document discusses the problem statement and use cases of
>> >>>   IPv6-based vehicular networking for Intelligent Transportation
>> >>>   Systems (ITS).  The main scenarios of vehicular communications are
>> >>>   vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and
>> >>>   vehicle-to-everything (V2X) communications.  First, this document
>> >>>   explains use cases using V2V, V2I, and V2X networking.  Next, for
>> >>>   IPv6-based vehicular networks, it makes a gap analysis of current
>> >>>   IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mobility Management=
,
>> >>>   and Security & Privacy), and then enumerates requirements for the
>> >>>   extensions of those IPv6 protocols for IPv6-based vehicular
>> >>>   networking.
>> >>>
>> >>>
>> >>> The IETF datatracker status page for this draft is:
>> >>>
>> https://datatracker.ietf.org/doc/draft-ietf-ipwave-vehicular-networking/
>> >>>
>> >>> There is also an htmlized version available at:
>> >>>
>> https://datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-networ=
king-26
>> >>>
>> >>> A diff from the previous version is available at:
>> >>>
>> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwave-vehicular-networki=
ng-26
>> >>>
>> >>>
>> >>> Internet-Drafts are also available by rsync at rsync.ietf.org:
>> :internet-drafts
>> >>>
>> >>>
>> >>> _______________________________________________
>> >>> its mailing list
>> >>> its@ietf.org
>> >>> https://www.ietf.org/mailman/listinfo/its
>> >>
>> >> _______________________________________________
>> >> its mailing list
>> >> its@ietf.org
>> >> https://www.ietf.org/mailman/listinfo/its
>> >
>> > _______________________________________________
>> > its mailing list
>> > its@ietf.org
>> > https://www.ietf.org/mailman/listinfo/its
>>
>> _______________________________________________
>> its mailing list
>> its@ietf.org
>> https://www.ietf.org/mailman/listinfo/its
>>
>

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<div dir=3D"ltr">I apologize; I see now the diff is small.=C2=A0 I was terr=
ibly afraid that the fast-rev&#39;ing version numbers meant lots of text wa=
s in flight (as opposed to just being held for fixing small things during i=
ncorporation=C2=A0of IESG feedback).<div><br></div><div>Russ, Carlos,</div>=
<div><br></div><div>If you think this document is not ready for the IESG te=
lechat let me=C2=A0know and I&#39;ll pull it back so it can get some more r=
ounds of consideration.=C2=A0 For now I&#39;m inclined to let it stay.</div=
><div><br></div><div>Thanks, and apologies,</div><div>-Erik</div></div><br>=
<div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Fe=
b 22, 2022 at 10:22 PM Erik Kline &lt;<a href=3D"mailto:ek.ietf@gmail.com">=
ek.ietf@gmail.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote"=
 style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);p=
adding-left:1ex"><div dir=3D"ltr">The inclusion of the OMNI stuff was highl=
ihgted during the LC, and I agreed to advance draft 25 to the IESG telechat=
.<div><br></div><div>Now I have to re-review draft 27.=C2=A0 I don&#39;t kn=
ow what&#39;s changed, but, in general, please avoid major surgery between =
IETF LC and IESG telechat.=C2=A0 We might need to pull draft 27 back for a =
2nd LC.</div><div><br></div><div>/me goes to have a look and the diff...</d=
iv></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_att=
r">On Tue, Feb 22, 2022 at 7:58 AM Templin (US), Fred L &lt;<a href=3D"mail=
to:Fred.L.Templin@boeing.com" target=3D"_blank">Fred.L.Templin@boeing.com</=
a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0p=
x 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">





<div lang=3D"EN-US">
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Doesn=E2=80=99t work, Dirk. Several months a=
go, Paul took my edits and the document looked<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">good. Then, someone came in later without my=
 knowing about it and said =E2=80=9Ctake out<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">all of the AERO/OMNI stuff=E2=80=9D, and no =
one told me about it. This is no longer a balanced<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">document; this is a document that embraces a=
 particular solution alternative while<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">ignoring another.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">You and I had a testy exchange earlier; if y=
our message is a continuation of that<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">exchange I can tell you that I do not apprec=
iate it.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Fred<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11pt;font-family:Calibri=
,sans-serif">From:</span></b><span style=3D"font-size:11pt;font-family:Cali=
bri,sans-serif"> <a href=3D"mailto:Dirk.von-Hugo@telekom.de" target=3D"_bla=
nk">Dirk.von-Hugo@telekom.de</a> [mailto:<a href=3D"mailto:Dirk.von-Hugo@te=
lekom.de" target=3D"_blank">Dirk.von-Hugo@telekom.de</a>]
<br>
<b>Sent:</b> Tuesday, February 22, 2022 7:46 AM<br>
<b>To:</b> Templin (US), Fred L &lt;<a href=3D"mailto:Fred.L.Templin@boeing=
.com" target=3D"_blank">Fred.L.Templin@boeing.com</a>&gt;; <a href=3D"mailt=
o:jaehoon.paul@gmail.com" target=3D"_blank">jaehoon.paul@gmail.com</a>; <a =
href=3D"mailto:housley@vigilsec.com" target=3D"_blank">housley@vigilsec.com=
</a><br>
<b>Cc:</b> <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</=
a><br>
<b>Subject:</b> [EXTERNAL] AW: [ipwave] I-D Action: draft-ietf-ipwave-vehic=
ular-networking-26.txt<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<table border=3D"0" cellspacing=3D"3" cellpadding=3D"0" width=3D"100%" styl=
e=3D"width:100%">
<tbody>
<tr>
<td style=3D"background:white;padding:0.75pt">
<table border=3D"0" cellspacing=3D"0" cellpadding=3D"0" align=3D"left" widt=
h=3D"100%" style=3D"width:100%;margin-left:0.75pt;margin-right:0.75pt">
<tbody>
<tr>
<td style=3D"background:rgb(145,10,25);padding:5.25pt 1.5pt"></td>
<td width=3D"100%" style=3D"width:100%;background:rgb(253,242,244);padding:=
5.25pt 3.75pt 5.25pt 11.25pt">
<div>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:Verdana,sans-serif;color:rgb(33,3=
3,33)">EXT email: be mindful of links/attachments.</span><u></u><u></u></p>
</div>
</td>
</tr>
</tbody>
</table>
<pre><span style=3D"color:black"><br>=C2=A0<u></u><u></u></span></pre>
</td>
</tr>
</tbody>
</table>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">Dear Fred, Paul, Russ and all,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">From my point of view - only loosely following this discussion - =
I do agree that Paul has achieved a good balance between different protocol=
s included/mentioned. Thanks for
 that!<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">Just a small typo: on page 3 it should also read
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">=E2=80=98Automatic Extended Route Optimization (AERO)=E2=80=99 in=
stead of =E2=80=98Asymmetric Extended Route Optimization (AERO)=E2=80=99<u>=
</u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif">And maybe one could add on p. 14 the sentence<u></u><u></u></span=
></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span style=3D"font-siz=
e:11pt;font-family:Calibri,sans-serif">=E2=80=98Refer to Appendix A for the=
 description how OMNI can support use of multiple radio technologies in V2X=
=E2=80=99.<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span style=3D"font-siz=
e:11pt;font-family:Calibri,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span style=3D"font-siz=
e:11pt;font-family:Calibri,sans-serif">Would that help? What do you think?<=
u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><span style=3D"font-siz=
e:11pt;font-family:Calibri,sans-serif">Thanks<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"DE" style=3D"font-size:11pt;font-famil=
y:Calibri,sans-serif">Best regards<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"DE" style=3D"font-size:11pt;font-famil=
y:Calibri,sans-serif">Dirk<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"DE" style=3D"font-size:11pt;font-famil=
y:Calibri,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal" style=3D"text-align:justify"><u></u>=C2=A0<u></u></p=
>
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b><span lang=3D"DE" style=3D"font-size:11pt;font-fa=
mily:Calibri,sans-serif">Von:</span></b><span lang=3D"DE" style=3D"font-siz=
e:11pt;font-family:Calibri,sans-serif"> its &lt;<a href=3D"mailto:its-bounc=
es@ietf.org" target=3D"_blank">its-bounces@ietf.org</a>&gt;
<b>Im Auftrag von </b>Templin (US), Fred L<br>
<b>Gesendet:</b> Dienstag, 22. Februar 2022 15:35<br>
<b>An:</b> Mr. Jaehoon Paul Jeong &lt;<a href=3D"mailto:jaehoon.paul@gmail.=
com" target=3D"_blank">jaehoon.paul@gmail.com</a>&gt;; Russ Housley &lt;<a =
href=3D"mailto:housley@vigilsec.com" target=3D"_blank">housley@vigilsec.com=
</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</=
a><br>
<b>Betreff:</b> Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networ=
king-26.txt<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span lang=3D"DE"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">The way the document is now, it reads as an =
endorsement for a particular approach.<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">The document was good last time I read it (w=
hich is a while ago) but I guess someone<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">got you to make drastic changes without my k=
nowing about it. The document cannot<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">go forward in its current form.<u></u><u></u=
></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)">Fred<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Calibri,sa=
ns-serif;color:rgb(31,73,125)"><u></u>=C2=A0<u></u></span></p>
<div style=3D"border-top:none;border-right:none;border-bottom:none;border-l=
eft:1.5pt solid blue;padding:0in 0in 0in 4pt">
<div>
<div style=3D"border-right:none;border-bottom:none;border-left:none;border-=
top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11pt;font-family:Calibri=
,sans-serif">From:</span></b><span style=3D"font-size:11pt;font-family:Cali=
bri,sans-serif"> Mr. Jaehoon Paul Jeong [<a href=3D"mailto:jaehoon.paul@gma=
il.com" target=3D"_blank">mailto:jaehoon.paul@gmail.com</a>]
<br>
<b>Sent:</b> Monday, February 21, 2022 7:50 PM<br>
<b>To:</b> Russ Housley &lt;<a href=3D"mailto:housley@vigilsec.com" target=
=3D"_blank">housley@vigilsec.com</a>&gt;; Templin (US), Fred L &lt;<a href=
=3D"mailto:Fred.L.Templin@boeing.com" target=3D"_blank">Fred.L.Templin@boei=
ng.com</a>&gt;<br>
<b>Cc:</b> <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</=
a>; Mr. Jaehoon Paul Jeong &lt;<a href=3D"mailto:jaehoon.paul@gmail.com" ta=
rget=3D"_blank">jaehoon.paul@gmail.com</a>&gt;<br>
<b>Subject:</b> [EXTERNAL] Re: [ipwave] I-D Action: draft-ietf-ipwave-vehic=
ular-networking-26.txt<u></u><u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<table border=3D"0" cellspacing=3D"3" cellpadding=3D"0" width=3D"100%" styl=
e=3D"width:100%">
<tbody>
<tr>
<td style=3D"background:white;padding:0.75pt">
<table border=3D"0" cellspacing=3D"0" cellpadding=3D"0" align=3D"left" widt=
h=3D"100%" style=3D"width:100%;margin-left:0.75pt;margin-right:0.75pt">
<tbody>
<tr>
<td style=3D"background:rgb(145,10,25);padding:5.25pt 1.5pt"></td>
<td width=3D"100%" style=3D"width:100%;background:rgb(253,242,244);padding:=
5.25pt 3.75pt 5.25pt 11.25pt">
<div>
<p class=3D"MsoNormal">
<span style=3D"font-size:10pt;font-family:Verdana,sans-serif;color:rgb(33,3=
3,33)">EXT email: be mindful of links/attachments.</span><u></u><u></u></p>
</div>
</td>
</tr>
</tbody>
</table>
<pre><span style=3D"color:black"><br>=C2=A0<u></u><u></u></span></pre>
</td>
</tr>
</tbody>
</table>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">Hi Russ,<u></u><u></u></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">I have replied to Fred&#39;s email just before.<u></u><u></u></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">As the editor, I tried to balance the two approaches even though =
the text of AERO/OMNI is reduced.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">Fred,<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">I hope you can understand my position as the editor.<u></u><u></u=
></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">Thanks.<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">Best Regards,<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">Paul<u></u><u></u></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
</div>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif"><u></u>=C2=A0<u></u></span></p>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:10pt;font-family:Calibri,sa=
ns-serif">On Tue, Feb 22, 2022 at 5:26 AM Russ Housley &lt;<a href=3D"mailt=
o:housley@vigilsec.com" target=3D"_blank">housley@vigilsec.com</a>&gt; wrot=
e:<u></u><u></u></span></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-bottom:none;b=
order-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin:5pt 0i=
n 5pt 4.8pt">
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><span style=3D"font-siz=
e:10pt;font-family:Calibri,sans-serif">Paul and Fred:<br>
<br>
I think the update is more aligned with the documents that are advancing on=
e the IETF stream.=C2=A0 That said, I would not be apposed to the inclusion=
 of the 6M&#39;s, but not in a way that claims that there is only one appro=
ach way to address these things.=C2=A0 What do
 you think about that was a way forward?<br>
<br>
Russ<br>
<br>
<br>
&gt; On Feb 21, 2022, at 2:56 PM, Templin (US), Fred L &lt;<a href=3D"mailt=
o:Fred.L.Templin@boeing.com" target=3D"_blank">Fred.L.Templin@boeing.com</a=
>&gt; wrote:<br>
&gt; <br>
&gt; Hi, I started reviewing this and found that it has been completely ove=
rhauled since I put my<br>
&gt; comments in many months ago. It has in fact been completely rewritten =
to favor the shared<br>
&gt; IPv6 multilink subnet model over multihop networks, to favor RPL/6LowP=
an over standard<br>
&gt; MANET routing protocols, to favor IPv6 ND changes over standard IPv6 N=
D, and to favor<br>
&gt; multilink DAD. None of that is necessary with AERO/OMNI and the NBMA-b=
ased virtual link<br>
&gt; created by the OMNI Adaptation. So, I stopped midway through marking u=
p the document<br>
&gt; with my comments because it has taken a complete left turn and started=
 down a wrong path.<br>
&gt; <br>
&gt; What is mainly at the heart of the divergence is that the document now=
 embraces the<br>
&gt; multilink IPv6 subnet model vs the AERO/OMNI NBMA link model that was =
there the last<br>
&gt; time I looked. But, there is no need for such complication when there =
is a much simpler<br>
&gt; alternative at hand. I notice also that in the appendices the AERO/OMN=
I &quot;6M&#39;s of Mobile<br>
&gt; Internetworking&quot; was removed - at the very least that needs to be=
 restored.<br>
&gt; <br>
&gt; In its current form, this document has been diverted to go down the wr=
ong path. It<br>
&gt; needs to be either re-balanced or re-written.<br>
&gt; <br>
&gt; Thanks - Fred<br>
&gt; <br>
&gt;&gt; -----Original Message-----<br>
&gt;&gt; From: its [mailto:<a href=3D"mailto:its-bounces@ietf.org" target=
=3D"_blank">its-bounces@ietf.org</a>] On Behalf Of Templin (US), Fred L<br>
&gt;&gt; Sent: Monday, February 21, 2022 7:28 AM<br>
&gt;&gt; To: <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org=
</a>; <a href=3D"mailto:i-d-announce@ietf.org" target=3D"_blank">
i-d-announce@ietf.org</a><br>
&gt;&gt; Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-netw=
orking-26.txt<br>
&gt;&gt; <br>
&gt;&gt; Hi, it looks like a lot of what was in the draft regarding AERO/OM=
NI has been cut out<br>
&gt;&gt; so that means I am going to have to re-review it. I will get to th=
is a soon as possible;<br>
&gt;&gt; hopefully in the next couple of days.<br>
&gt;&gt; <br>
&gt;&gt; Fred<br>
&gt;&gt; <br>
&gt;&gt;&gt; -----Original Message-----<br>
&gt;&gt;&gt; From: its [mailto:<a href=3D"mailto:its-bounces@ietf.org" targ=
et=3D"_blank">its-bounces@ietf.org</a>] On Behalf Of
<a href=3D"mailto:internet-drafts@ietf.org" target=3D"_blank">internet-draf=
ts@ietf.org</a><br>
&gt;&gt;&gt; Sent: Sunday, February 20, 2022 9:00 PM<br>
&gt;&gt;&gt; To: <a href=3D"mailto:i-d-announce@ietf.org" target=3D"_blank"=
>i-d-announce@ietf.org</a><br>
&gt;&gt;&gt; Cc: <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf=
.org</a><br>
&gt;&gt;&gt; Subject: [EXTERNAL] [ipwave] I-D Action: draft-ietf-ipwave-veh=
icular-networking-26.txt<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; EXT email: be mindful of links/attachments.<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; A New Internet-Draft is available from the on-line Internet-Dr=
afts directories.<br>
&gt;&gt;&gt; This draft is a work item of the IP Wireless Access in Vehicul=
ar Environments WG of the IETF.<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Title=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0: IPv6 Wireless Access in Vehicular Environments (IPWAVE): Pro=
blem Statement and Use Cases<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Author=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 : Jaehoon (Paul) Jeong<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft=
-ietf-ipwave-vehicular-networking-26.txt<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0: 49<br>
&gt;&gt;&gt;=C2=A0 =C2=A0 =C2=A0Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 : 2022-02-20<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; Abstract:<br>
&gt;&gt;&gt;=C2=A0 =C2=A0This document discusses the problem statement and =
use cases of<br>
&gt;&gt;&gt;=C2=A0 =C2=A0IPv6-based vehicular networking for Intelligent Tr=
ansportation<br>
&gt;&gt;&gt;=C2=A0 =C2=A0Systems (ITS).=C2=A0 The main scenarios of vehicul=
ar communications are<br>
&gt;&gt;&gt;=C2=A0 =C2=A0vehicle-to-vehicle (V2V), vehicle-to-infrastructur=
e (V2I), and<br>
&gt;&gt;&gt;=C2=A0 =C2=A0vehicle-to-everything (V2X) communications.=C2=A0 =
First, this document<br>
&gt;&gt;&gt;=C2=A0 =C2=A0explains use cases using V2V, V2I, and V2X network=
ing.=C2=A0 Next, for<br>
&gt;&gt;&gt;=C2=A0 =C2=A0IPv6-based vehicular networks, it makes a gap anal=
ysis of current<br>
&gt;&gt;&gt;=C2=A0 =C2=A0IPv6 protocols (e.g., IPv6 Neighbor Discovery, Mob=
ility Management,<br>
&gt;&gt;&gt;=C2=A0 =C2=A0and Security &amp; Privacy), and then enumerates r=
equirements for the<br>
&gt;&gt;&gt;=C2=A0 =C2=A0extensions of those IPv6 protocols for IPv6-based =
vehicular<br>
&gt;&gt;&gt;=C2=A0 =C2=A0networking.<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; The IETF datatracker status page for this draft is:<br>
&gt;&gt;&gt; <a href=3D"https://datatracker.ietf.org/doc/draft-ietf-ipwave-=
vehicular-networking/" target=3D"_blank">
https://datatracker.ietf.org/doc/draft-ietf-ipwave-vehicular-networking/</a=
><br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; There is also an htmlized version available at:<br>
&gt;&gt;&gt; <a href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-ip=
wave-vehicular-networking-26" target=3D"_blank">
https://datatracker.ietf.org/doc/html/draft-ietf-ipwave-vehicular-networkin=
g-26</a><br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; A diff from the previous version is available at:<br>
&gt;&gt;&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwa=
ve-vehicular-networking-26" target=3D"_blank">
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-ipwave-vehicular-networking-=
26</a><br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; Internet-Drafts are also available by rsync at rsync.ietf.org:=
:internet-drafts<br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; <br>
&gt;&gt;&gt; _______________________________________________<br>
&gt;&gt;&gt; its mailing list<br>
&gt;&gt;&gt; <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org=
</a><br>
&gt;&gt;&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/its" target=
=3D"_blank">https://www.ietf.org/mailman/listinfo/its</a><br>
&gt;&gt; <br>
&gt;&gt; _______________________________________________<br>
&gt;&gt; its mailing list<br>
&gt;&gt; <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</a>=
<br>
&gt;&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/its" target=3D"_b=
lank">https://www.ietf.org/mailman/listinfo/its</a><br>
&gt; <br>
&gt; _______________________________________________<br>
&gt; its mailing list<br>
&gt; <a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</a><br>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/its" target=3D"_blank=
">https://www.ietf.org/mailman/listinfo/its</a><u></u><u></u></span></p>
</blockquote>
</div>
</div>
</div>
</div>

_______________________________________________<br>
its mailing list<br>
<a href=3D"mailto:its@ietf.org" target=3D"_blank">its@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/its" rel=3D"noreferrer" ta=
rget=3D"_blank">https://www.ietf.org/mailman/listinfo/its</a><br>
</blockquote></div>
</blockquote></div>

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Archived-At: <https://mailarchive.ietf.org/arch/msg/its/ecEXwuq3R95t6FzFDhK5gpr98aM>
Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: Erik Kline <ek.ietf@gmail.com>
CC: "Dirk.von-Hugo@telekom.de" <Dirk.von-Hugo@telekom.de>, "jaehoon.paul@gmail.com" <jaehoon.paul@gmail.com>, "housley@vigilsec.com" <housley@vigilsec.com>, "its@ietf.org" <its@ietf.org>, "Pascal Thubert (pthubert)" <pthubert@cisco.com>
Thread-Topic: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
Thread-Index: Adgow2VhCCweD8deQxyKzVFUIXd4lw==
Date: Wed, 23 Feb 2022 14:42:24 +0000
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: Erik Kline <ek.ietf@gmail.com>, "Pascal Thubert (pthubert)" <pthubert@cisco.com>, "housley@vigilsec.com" <housley@vigilsec.com>, "jaehoon.paul@gmail.com" <jaehoon.paul@gmail.com>, "its@ietf.org" <its@ietf.org>, "Dirk.von-Hugo@telekom.de" <Dirk.von-Hugo@telekom.de>
Thread-Topic: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Date: Thu, 24 Feb 2022 20:51:00 +0000
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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From: "Mr. Jaehoon Paul Jeong" <jaehoon.paul@gmail.com>
Date: Fri, 25 Feb 2022 08:55:25 +0900
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To: Pascal Thubert <pthubert@cisco.com>, "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
Cc: "Dirk.von-Hugo@telekom.de" <Dirk.von-Hugo@telekom.de>, Erik Kline <ek.ietf@gmail.com>,  "Mr. Jaehoon Paul Jeong" <jaehoon.paul@gmail.com>, "housley@vigilsec.com" <housley@vigilsec.com>,  "its@ietf.org" <its@ietf.org>, skku-iotlab-members <skku-iotlab-members@googlegroups.com>
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Hi Fred,
Thanks for your suggested update.

However, I need the review from Pascal as an INTDIR reviewer.

Pascal,
Could you review the update from Fred and confirm that his update does not
break the balance between the two approaches of RPL and AERO/ONMI?

Thanks.

Best Regards,
Paul

2022=EB=85=84 2=EC=9B=94 25=EC=9D=BC (=EA=B8=88) =EC=98=A4=EC=A0=84 5:51, T=
emplin (US), Fred L <Fred.L.Templin@boeing.com>=EB=8B=98=EC=9D=B4
=EC=9E=91=EC=84=B1:

> All, see below for my comments on
> 'draft-ietf-ipwave-vehicular-networking-26.txt'.
> It might be worth noting that my colleagues and I have been looking at
> vehicular
> communications use cases for a long time (e.g., see: RANGERS [RFC6139]).
>
> Indeed, support for vehicular communications of all forms (land, sea, air=
,
> space)
> has long been the driving force behind the AERO and OMNI technologies whi=
ch
> have taken their current shape as a result. Please see below for comments
> and
> make corresponding changes to the document.
>
> Fred Templin
>
> ---
>
> Comments on 'draft-ietf-ipwave-vehicular-networking-26.txt':
> **************************************************
> 1) Section 1, change: "Asymmetric Extended Route Optimization (AERO)
> [I-D.templin-6man-aero]"
> to:
> "Automatic Extended Route Optimization based on the Overlay Multilink
> Network Interface (AERO/OMNI)
> [I-D.templin-6man-aero][I-D.templin-6man-omni]".
>
> 2) Section 3, change: "The use cases presented in this section serve as
> the description and motivation for the need to extend IPv6 and its
> protocols
> to facilitate "Vehicular IPv6"."
> to:
> "The use cases presented in this section serve as the description and
> motivation
> for the need to augment IPv6 and its protocols to facilitate "Vehicular
> IPv6"."
>
> 3) Section 3.2, change the paragraph beginning: "The existing IPv6 protoc=
ol
> must be augmented through protocol changes..."
> to:
> "The existing IPv6 protocol must be augmented either through protocol
> changes
> or by including a new adaptation layer in the architecture that efficient=
ly
> maps IPv6 to a diversity of link layer technologies. Augmentation is
> necessary
> to support wireless multihop V2I communications in a highway where RSUs a=
re
> sparsely deployed, so a vehicle can reach the wireless coverage of an RSU
> through the multihop data forwarding of intermediate vehicles."
>
> 4) Section 3.3, change the paragraph beginning: "The existing IPv6 protoc=
ol
> must be augmented through protocol changes..."
> to:
> "The existing IPv6 protocol must be augmented through protocol changes or
> by including a new adaptation layer in the architecture that efficiently
> maps IPv6 to a diversity of underlying link layer technologies.
> Augmentation
> is necessary to support wireless multihop V2X or V2I2X communications in =
an
> urban road network where RSUs are deployed at intersections, so a vehicle
> (or a pedestrian's smartphone) can reach the wireless coverage of an RSU
> through the multihop data forwarding of intermediate vehicles (or
> pedestrians'
> smartphones) as packet forwarders."
>
> 5) Section 4.1, second paragraph, change: "OMNI (Overlay Multilink Networ=
k
> Interface) [I-D.templin-6man-omni]"
> to:
> "AERO/OMNI [I-D.templin-6man-aero][I-D.templin-6man-omni]".
>
> 6) Section 4.1, third paragraph, change: "Furthermore, the wireless
> media interfaces are autoconfigured with a global IPv6 prefix
> (e.g., 2001:DB8:1:1::/64) to support both V2V and V2I networking. Note
> that 2001:DB8::/32 is a documentation prefix [RFC3849] for example
> prefixes in this document, and also that any routable IPv6 address
> needs to be routable in a VANET and a vehicular network including IP-RSUs=
."
> to:
> "In a first addressing alternative, the wireless media interfaces
> are autoconfigured with a global IPv6 prefix (e.g., 2001:DB8:1:1::/64)
> to support both V2V and V2I networking. Note that 2001:DB8::/32 is a
> documentation prefix [RFC3849] for example prefixes in this document,
> and also that any routable IPv6 address needs to be routable in a VANET
> and a vehicular network including IP-RSUs. In a second alternative, each
> wireless media interface is configured with an IPv6 Unique Local Address
> (ULA) [RFC4193] that is assured unique within the vehicular network
> according to AERO/OMNI and [RFC5889]. The ULA supports both V2V and V2I
> multihop forwarding within the vehicular network (e.g., via a VANET
> routing protocol) while each vehicle can communicate with Internet
> correspondents using global IPv6 addresses via OMNI interface
> encapsulation over the wireless interface."
>
> 7) Section 4.1, fifth paragraph, change: "Alternatively, mobile nodes
> can employ a "Bring-Your-Own-Addresses (BYOA)" technique using their
> own IPv6 Unique Local Addresses (ULAs) [RFC4193] over the wireless
> network, which does not require the messaging (e.g., Duplicate Address
> Detection (DAD)) of IPv6 Stateless Address Autoconfiguration (SLAAC)
> [RFC4862]."
> to:
> "Alternatively, mobile nodes can configure IPv6 Unique Local Addresses
> (ULAs) according AERO/OMNI then support global communications through
> OMNI interface encapsulation and forwarding of packets with MNP-based
> global IPv6 addresses over the wireless networks. The use of AERO/OMNI
> ULA autoconfiguration assures uniqueness such that Duplicate Address
> Detection (DAD) of IPv6 Stateless Address Autoconfiguration (SLAAC)
> [RFC4862] is not needed."
>
> 8) Section 4.2, add the following as a final paragraph:
> "In a second alternative when vehicles configure an OMNI interface over
> an underlying VANET based on ULA addressing, the global IPv6 addresses
> covered by the MNP on-board the vehicle are not injected into the VANET
> routing system but instead traverse the VANET in the forwarding plane
> via OMNI encapsulation. This allows each vehicle to maintain a constant
> and unchanging MNP delegation even as it moves between IP-RSUs. This
> avoids any need for vehicle on-board network renumbering due to
> mobility and avoids repeated injections and withdrawals of MNP
> prefixes within the VANET."
>
> 9) Section 4.3, add new paragraph following paragraph beginning
> "Figure 3 shows the internetworking" as follows:
> "When two vehicles within a ULA-based VANET need to communicate without
> the assistance of any infrastructure, they can exchange unencapsulated
> IPv6 packets with ULA-based addresses which will be forwarded according
> to the VANET routing protocol. Alternatively, the vehicles can use OMNI
> interface encapsulation to exchange IPv6 packets with global addresses
> taken from their respective MNPs. The encapsulation source and destinatio=
n
> ULAs are algorithmically bound to the IPv6 source and destination global
> addresses which allows for stateless encapsulation address determination.=
"
>
> 10) Section 4.3, final paragraph, there is no reason to cite as examples
> all RFC variants of the OLSR protocol and all extensions of the DLEP
> protocol - pick one (or at most 2) RFCs for each. Also, it is important
> to state that standard OSPF routing has been optimized to support MANET
> applications. Suggested rewrite:
> "...which serves MANET routing protocols such as the different versions
> of Optimized Link State Routing Protocol (OLSR) [RFC3626][RFC7181], Open
> Shortest Path First (OSPF) derivatives (e.g., [RFC5614]) and the Dynamic
> Link Exchange Protocol (DLEP) [RFC8175] with its extensions."
>
> 11) Section 5.1, second paragraph, change: "they need to be configured
> with a link-local IPv6 address or a global IPv6 address"
> to:
> "they need to be configured with link-local, unique-local and/or global
> IPv6 addresses"
>
> 12) Section 5.2, third paragraph, change: "An efficient DAD is required
> to reduce the overhead of the DAD packets during a vehicle's travel in
> a road network"
> to:
> "DAD is not needed in networks that follow the OMNI ULA autoconfiguration
> procedures. In other cases when DAD is needed, it must be made efficient
> to reduce the overhead of the DAD packets during a vehicle's travel in
> a road network"
>
> 13) Section 5.1.1, third paragraph, change: "There is a relationship
> between a link and a prefix, besides the different scopes that are
> expected from the link-local and global types of IPv6 addresses."
> to:
> "There is a relationship between a link and a prefix, besides the
> different scopes that are expected from the link-local, unique-local
> and global types of IPv6 addresses."
>
> 14) Section 5.1.1, add a new second-to-last paragraph as follows:
> "Often when two VANETs merge some vehicles may configure addresses from
> a first subnet prefix while other vehicles configure addresses from other
> subnet prefixes. These merge events must not interfere with the
> vehicle-to-vehicle multihop forwarding necessary to support continuous
> communications. Additionally, when a vehicle enters the network for the
> first time it may need to use a temporary ULA address in initial messages
> to negotiate with an IP-RSU for an address within the subnet. The VANET
> must therefore provide (short-term) forwarding for vehicles with foreign
> addresses, while the subnet prefix serves as an aggregation point of
> reference for a particular IP-RSU without impeding multihop forwarding
> between vehicles that may belong to different subnets."
>
> 15) Section 5.1.3 goes too far in expanding on RPL. It is based on the
> claim that: "However, it will be costly to run both vehicular ND and a
> vehicular ad hoc routing protocol in terms of control traffic overhead
> [RFC9119].". But, the AERO/OMNI approach uses only the MANET routing
> protocol control messages at the subnet level then applies unicast-only
> IPv6 ND messaging at the OMNI interface level so that there is no traffic
> amplification due to multicast IPv6 ND within the subnet. Therefore, a
> new third paragraph telling how it works in AERO/OMNI should be added
> as follows:
> "The AERO/OMNI approach avoids this issue by using MANET routing protocol=
s
> only (i.e., and no multicast IPv6 ND messaging) in the wireless network
> underlay while applying efficient unicast IPv6 ND messaging in the OMNI
> overlay on an as-needed basis for router discovery and NUD. This greatly
> reduces the overhead for VANET-wide multicasting while providing agile
> accommodation for dynamic topology changes."
>
> Additionally, the RPL text should be reduced by at least 50%.
>
> 16) Section 5.2, paragraph 6 change: "Even though the SLAAC with classic
> ND costs a DAD during mobility management, the SLAAC with [RFC8505] does
> not cost a DAD."
> to:
> "Even though classic IPv6 ND requires the use of DAD on many link types
> during mobility management, address autoconfiguration based on [RFC8505]
> and/or AERO/OMNI does not require DAD."
>
> 17) Section 5.2, paragraph 6, remove the following text entirely:
> "On the other hand, a BYOA does not allow such direct routability
> to the Internet since the BYOA is not topologically correct, that is,
> not routable in the Internet. In addition, a vehicle configured with
> a BYOA needs a tunnel home (e.g., IP-RSU) connected to the Internet,
> and the vehicle needs to know which neighboring vehicle is reachable
> inside the VANET toward the tunnel home. There is nonnegligible control
> overhead to set up and maintain routes to such a tunnel home over
> the VANET."
>
> Reason: There is always a cost for maintaining mobility management
> for addresses within an MNP. It can be done either by frequent
> advertisements/withdrawals of the MNP in the global routing system or
> through coordination with a mobility anchor point in an overlay via
> encapsulation. The Connexion by Boeing experience showed that dynamic
> routing protocol updates do not scale in the global Internet. The
> AERO/OMNI services instead minimize routing protocol disturbance
> while using efficient mobility signaling in the overlay.
>
> 18) Section 5.2, near the end, remove the following sentence: "IP
> tunneling over the wireless link should be avoided for performance
> efficiency."
>
> Reason: IP tunneling is used only in support of global-scoped IPv6
> communication (not local-scoped) and can use effective header
> compression for greater efficiency as in AERO/OMNI. In addition,
> there is value in using encapsulation both from the standpoint of
> minimizing global routing protocol overhead and by accommodating
> path MTU diversity (see below).
>
> 19) Add a new Section 5.3 as follows:
> "5.3 Accommodating MTU Diversity
>
> The wireless and/or wired-line links in paths between both mobile
> nodes and fixed network correspondents may configure a variety of
> Maximum Transmission Units (MTUs), where all IPv6 links are required
> to support a minimum MTU of 1280 octets and MAY support larger MTUs.
> Unfortunately, determining the path MTU (i.e., the minimum link MTU
> in the path) has proven to be inefficient and unreliable due to the
> uncertain nature of the loss-oriented ICMPv6 messaging service used
> for path MTU discovery. Recent developments have produced a more
> reliable path MTU determination service for TCP [RFC4821] and UDP
> [RFC8899] however the MTUs discovered are always limited by the most
> restrictive link MTU in the path (often 1500 octets or smaller).
>
> The AERO/OMNI service addresses the MTU issue by introducing a new
> layer in the Internet architecture known as the "OMNI Adaptation Layer
> (OAL)". The OAL allows end systems that configure an OMNI interface
> to utilize a full 65535 octet MTU by leveraging the IPv6 fragmentation
> and reassembly service during encapsulation to produce fragment sizes
> that are assured of traversing the path without loss due to a
> size restriction. (This allows end systems to send packets that are
> often much larger than the actual path MTU.)
>
> Performance studies over the course of many decades have proven that
> applications will see greater performance by sending smaller numbers
> of large packets (as opposed to larger numbers of small packets) even
> if fragmentation is needed. The OAL further supports even larger packet
> sizes through the IP Parcels construct [I-D.templin-intarea-parcels]
> which provides "packet-in-packet" encapsulation for a total size up
> to 4MB. Together, the OAL and IP Parcels will provide a revolutionary
> new capability for greater efficiency in both mobile and fixed networks."
>
> 20) Appendix B, add the following as a final paragraph:
> "AERO and OMNI together securely and efficiently address the following
> 6 M's of Modern Internetworking for mobile V2V, V2I and V2X Clients:
>
>    1.  Multilink: A Client's ability to coordinate multiple diverse
>        underlying data links as a single logical unit (i.e., the OMNI
>        interface) to achieve the required communications performance and
>        reliability objectives.
>
>    2.  Multinet: The ability to span the OMNI link over a segment
>        routing topology with multiple diverse administrative domain
>        network segments while maintaining seamless E2E communications
>        between mobile Clients and correspondents such as air traffic
>        controllers and fleet administrators.
>
>    3.  Mobility: A Client's ability to change network points of
>        attachment (e.g., moving between wireless base stations) which
>        may result in an underlying interface address change without
>        disruptions to ongoing communication sessions with peers over the
>        OMNI link.
>
>    4.  Multicast: The ability to send a single network transmission that
>        reaches multiple Clients belonging to the same interest group
>        without disturbing other Clients not subscribed to the interest
>        group.
>
>    5.  Multihop: A mobile Client's V2V relaying capability useful when
>        multiple forwarding hops between vehicles may be necessary to
>        reach back to an infrastructure access point connection to the
>        OMNI link.
>
>    6.  MTU Assurance: The ability to deliver packets of various robust
>        sizes between peers without loss due to a link size restriction,
>        and to dynamically adjust packet sizes in order to achieve the
>        optimal performance for each independent traffic flow."
>
--=20
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D
Mr. Jaehoon (Paul) Jeong, Ph.D.
Associate Professor
Department Head
Department of Computer Science and Engineering
Sungkyunkwan University
Office: +82-31-299-4957
Email: pauljeong@skku.edu, jaehoon.paul@gmail.com
Personal Homepage: http://iotlab.skku.edu/people-jaehoon-jeong.php
<http://cpslab.skku.edu/people-jaehoon-jeong.php>

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<div><div dir=3D"auto">Hi Fred,</div><div dir=3D"auto">Thanks for your sugg=
ested update.</div><div dir=3D"auto"><br></div><div dir=3D"auto">However, I=
 need the review from Pascal as an INTDIR reviewer.</div><div dir=3D"auto">=
<br></div><div dir=3D"auto">Pascal,</div><div dir=3D"auto">Could you review=
 the update from Fred and confirm that his update does not break the balanc=
e between the two approaches of RPL and AERO/ONMI?</div><div dir=3D"auto"><=
br></div><div dir=3D"auto">Thanks.</div><div dir=3D"auto"><br></div><div di=
r=3D"auto">Best Regards,</div><div dir=3D"auto">Paul</div><div><br><div cla=
ss=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">2022=EB=85=84 2=EC=
=9B=94 25=EC=9D=BC (=EA=B8=88) =EC=98=A4=EC=A0=84 5:51, Templin (US), Fred =
L &lt;<a href=3D"mailto:Fred.L.Templin@boeing.com" target=3D"_blank">Fred.L=
.Templin@boeing.com</a>&gt;=EB=8B=98=EC=9D=B4 =EC=9E=91=EC=84=B1:<br></div>=
</div></div></div><div><div><div class=3D"gmail_quote"><blockquote class=3D=
"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding=
-left:1ex">All, see below for my comments on &#39;draft-ietf-ipwave-vehicul=
ar-networking-26.txt&#39;.<br>
It might be worth noting that my colleagues and I have been looking at vehi=
cular<br>
communications use cases for a long time (e.g., see: RANGERS [RFC6139]).<br=
>
<br>
Indeed, support for vehicular communications of all forms (land, sea, air, =
space)<br>
has long been the driving force behind the AERO and OMNI technologies which=
<br>
have taken their current shape as a result. Please see below for comments a=
nd<br>
make corresponding changes to the document.<br>
<br>
Fred Templin<br>
<br>
---<br>
<br>
Comments on &#39;draft-ietf-ipwave-vehicular-networking-26.txt&#39;:<br>
**************************************************<br>
1) Section 1, change: &quot;Asymmetric Extended Route Optimization (AERO)<b=
r>
[I-D.templin-6man-aero]&quot;<br>
to:<br>
&quot;Automatic Extended Route Optimization based on the Overlay Multilink<=
br>
Network Interface (AERO/OMNI) [I-D.templin-6man-aero][I-D.templin-6man-omni=
]&quot;.<br>
<br>
2) Section 3, change: &quot;The use cases presented in this section serve a=
s<br>
the description and motivation for the need to extend IPv6 and its protocol=
s<br>
to facilitate &quot;Vehicular IPv6&quot;.&quot;<br>
to:<br>
&quot;The use cases presented in this section serve as the description and =
motivation<br>
for the need to augment IPv6 and its protocols to facilitate &quot;Vehicula=
r IPv6&quot;.&quot;<br>
<br>
3) Section 3.2, change the paragraph beginning: &quot;The existing IPv6 pro=
tocol<br>
must be augmented through protocol changes...&quot;<br>
to:<br>
&quot;The existing IPv6 protocol must be augmented either through protocol =
changes<br>
or by including a new adaptation layer in the architecture that efficiently=
<br>
maps IPv6 to a diversity of link layer technologies. Augmentation is necess=
ary<br>
to support wireless multihop V2I communications in a highway where RSUs are=
<br>
sparsely deployed, so a vehicle can reach the wireless coverage of an RSU<b=
r>
through the multihop data forwarding of intermediate vehicles.&quot;<br>
<br>
4) Section 3.3, change the paragraph beginning: &quot;The existing IPv6 pro=
tocol<br>
must be augmented through protocol changes...&quot;<br>
to:<br>
&quot;The existing IPv6 protocol must be augmented through protocol changes=
 or<br>
by including a new adaptation layer in the architecture that efficiently<br=
>
maps IPv6 to a diversity of underlying link layer technologies. Augmentatio=
n<br>
is necessary to support wireless multihop V2X or V2I2X communications in an=
<br>
urban road network where RSUs are deployed at intersections, so a vehicle<b=
r>
(or a pedestrian&#39;s smartphone) can reach the wireless coverage of an RS=
U<br>
through the multihop data forwarding of intermediate vehicles (or pedestria=
ns&#39;<br>
smartphones) as packet forwarders.&quot;<br>
<br>
5) Section 4.1, second paragraph, change: &quot;OMNI (Overlay Multilink Net=
work<br>
Interface) [I-D.templin-6man-omni]&quot;<br>
to:<br>
&quot;AERO/OMNI [I-D.templin-6man-aero][I-D.templin-6man-omni]&quot;.<br>
<br>
6) Section 4.1, third paragraph, change: &quot;Furthermore, the wireless<br=
>
media interfaces are autoconfigured with a global IPv6 prefix<br>
(e.g., 2001:DB8:1:1::/64) to support both V2V and V2I networking. Note<br>
that 2001:DB8::/32 is a documentation prefix [RFC3849] for example<br>
prefixes in this document, and also that any routable IPv6 address<br>
needs to be routable in a VANET and a vehicular network including IP-RSUs.&=
quot;<br>
to:<br>
&quot;In a first addressing alternative, the wireless media interfaces<br>
are autoconfigured with a global IPv6 prefix (e.g., 2001:DB8:1:1::/64)<br>
to support both V2V and V2I networking. Note that 2001:DB8::/32 is a<br>
documentation prefix [RFC3849] for example prefixes in this document,<br>
and also that any routable IPv6 address needs to be routable in a VANET<br>
and a vehicular network including IP-RSUs. In a second alternative, each<br=
>
wireless media interface is configured with an IPv6 Unique Local Address<br=
>
(ULA) [RFC4193] that is assured unique within the vehicular network<br>
according to AERO/OMNI and [RFC5889]. The ULA supports both V2V and V2I<br>
multihop forwarding within the vehicular network (e.g., via a VANET<br>
routing protocol) while each vehicle can communicate with Internet<br>
correspondents using global IPv6 addresses via OMNI interface<br>
encapsulation over the wireless interface.&quot;<br>
<br>
7) Section 4.1, fifth paragraph, change: &quot;Alternatively, mobile nodes<=
br>
can employ a &quot;Bring-Your-Own-Addresses (BYOA)&quot; technique using th=
eir<br>
own IPv6 Unique Local Addresses (ULAs) [RFC4193] over the wireless<br>
network, which does not require the messaging (e.g., Duplicate Address<br>
Detection (DAD)) of IPv6 Stateless Address Autoconfiguration (SLAAC)<br>
[RFC4862].&quot;<br>
to:<br>
&quot;Alternatively, mobile nodes can configure IPv6 Unique Local Addresses=
<br>
(ULAs) according AERO/OMNI then support global communications through<br>
OMNI interface encapsulation and forwarding of packets with MNP-based<br>
global IPv6 addresses over the wireless networks. The use of AERO/OMNI<br>
ULA autoconfiguration assures uniqueness such that Duplicate Address<br>
Detection (DAD) of IPv6 Stateless Address Autoconfiguration (SLAAC)<br>
[RFC4862] is not needed.&quot;<br>
<br>
8) Section 4.2, add the following as a final paragraph:<br>
&quot;In a second alternative when vehicles configure an OMNI interface ove=
r<br>
an underlying VANET based on ULA addressing, the global IPv6 addresses<br>
covered by the MNP on-board the vehicle are not injected into the VANET<br>
routing system but instead traverse the VANET in the forwarding plane<br>
via OMNI encapsulation. This allows each vehicle to maintain a constant<br>
and unchanging MNP delegation even as it moves between IP-RSUs. This<br>
avoids any need for vehicle on-board network renumbering due to<br>
mobility and avoids repeated injections and withdrawals of MNP<br>
prefixes within the VANET.&quot;<br>
<br>
9) Section 4.3, add new paragraph following paragraph beginning<br>
&quot;Figure 3 shows the internetworking&quot; as follows:<br>
&quot;When two vehicles within a ULA-based VANET need to communicate withou=
t<br>
the assistance of any infrastructure, they can exchange unencapsulated<br>
IPv6 packets with ULA-based addresses which will be forwarded according<br>
to the VANET routing protocol. Alternatively, the vehicles can use OMNI<br>
interface encapsulation to exchange IPv6 packets with global addresses<br>
taken from their respective MNPs. The encapsulation source and destination<=
br>
ULAs are algorithmically bound to the IPv6 source and destination global<br=
>
addresses which allows for stateless encapsulation address determination.&q=
uot;<br>
<br>
10) Section 4.3, final paragraph, there is no reason to cite as examples<br=
>
all RFC variants of the OLSR protocol and all extensions of the DLEP<br>
protocol - pick one (or at most 2) RFCs for each. Also, it is important<br>
to state that standard OSPF routing has been optimized to support MANET<br>
applications. Suggested rewrite:<br>
&quot;...which serves MANET routing protocols such as the different version=
s<br>
of Optimized Link State Routing Protocol (OLSR) [RFC3626][RFC7181], Open<br=
>
Shortest Path First (OSPF) derivatives (e.g., [RFC5614]) and the Dynamic<br=
>
Link Exchange Protocol (DLEP) [RFC8175] with its extensions.&quot;<br>
<br>
11) Section 5.1, second paragraph, change: &quot;they need to be configured=
<br>
with a link-local IPv6 address or a global IPv6 address&quot;<br>
to:<br>
&quot;they need to be configured with link-local, unique-local and/or globa=
l<br>
IPv6 addresses&quot;<br>
<br>
12) Section 5.2, third paragraph, change: &quot;An efficient DAD is require=
d<br>
to reduce the overhead of the DAD packets during a vehicle&#39;s travel in<=
br>
a road network&quot;<br>
to:<br>
&quot;DAD is not needed in networks that follow the OMNI ULA autoconfigurat=
ion<br>
procedures. In other cases when DAD is needed, it must be made efficient<br=
>
to reduce the overhead of the DAD packets during a vehicle&#39;s travel in<=
br>
a road network&quot;<br>
<br>
13) Section 5.1.1, third paragraph, change: &quot;There is a relationship<b=
r>
between a link and a prefix, besides the different scopes that are<br>
expected from the link-local and global types of IPv6 addresses.&quot;<br>
to:<br>
&quot;There is a relationship between a link and a prefix, besides the <br>
different scopes that are expected from the link-local, unique-local<br>
and global types of IPv6 addresses.&quot;<br>
<br>
14) Section 5.1.1, add a new second-to-last paragraph as follows:<br>
&quot;Often when two VANETs merge some vehicles may configure addresses fro=
m<br>
a first subnet prefix while other vehicles configure addresses from other<b=
r>
subnet prefixes. These merge events must not interfere with the<br>
vehicle-to-vehicle multihop forwarding necessary to support continuous<br>
communications. Additionally, when a vehicle enters the network for the<br>
first time it may need to use a temporary ULA address in initial messages<b=
r>
to negotiate with an IP-RSU for an address within the subnet. The VANET<br>
must therefore provide (short-term) forwarding for vehicles with foreign<br=
>
addresses, while the subnet prefix serves as an aggregation point of<br>
reference for a particular IP-RSU without impeding multihop forwarding<br>
between vehicles that may belong to different subnets.&quot;<br>
<br>
15) Section 5.1.3 goes too far in expanding on RPL. It is based on the<br>
claim that: &quot;However, it will be costly to run both vehicular ND and a=
<br>
vehicular ad hoc routing protocol in terms of control traffic overhead<br>
[RFC9119].&quot;. But, the AERO/OMNI approach uses only the MANET routing<b=
r>
protocol control messages at the subnet level then applies unicast-only<br>
IPv6 ND messaging at the OMNI interface level so that there is no traffic<b=
r>
amplification due to multicast IPv6 ND within the subnet. Therefore, a<br>
new third paragraph telling how it works in AERO/OMNI should be added<br>
as follows:<br>
&quot;The AERO/OMNI approach avoids this issue by using MANET routing proto=
cols<br>
only (i.e., and no multicast IPv6 ND messaging) in the wireless network<br>
underlay while applying efficient unicast IPv6 ND messaging in the OMNI<br>
overlay on an as-needed basis for router discovery and NUD. This greatly<br=
>
reduces the overhead for VANET-wide multicasting while providing agile<br>
accommodation for dynamic topology changes.&quot;<br>
<br>
Additionally, the RPL text should be reduced by at least 50%.<br>
<br>
16) Section 5.2, paragraph 6 change: &quot;Even though the SLAAC with class=
ic<br>
ND costs a DAD during mobility management, the SLAAC with [RFC8505] does<br=
>
not cost a DAD.&quot;<br>
to:<br>
&quot;Even though classic IPv6 ND requires the use of DAD on many link type=
s<br>
during mobility management, address autoconfiguration based on [RFC8505]<br=
>
and/or AERO/OMNI does not require DAD.&quot;<br>
<br>
17) Section 5.2, paragraph 6, remove the following text entirely:<br>
&quot;On the other hand, a BYOA does not allow such direct routability<br>
to the Internet since the BYOA is not topologically correct, that is,<br>
not routable in the Internet. In addition, a vehicle configured with<br>
a BYOA needs a tunnel home (e.g., IP-RSU) connected to the Internet,<br>
and the vehicle needs to know which neighboring vehicle is reachable<br>
inside the VANET toward the tunnel home. There is nonnegligible control<br>
overhead to set up and maintain routes to such a tunnel home over<br>
the VANET.&quot;<br>
<br>
Reason: There is always a cost for maintaining mobility management<br>
for addresses within an MNP. It can be done either by frequent<br>
advertisements/withdrawals of the MNP in the global routing system or<br>
through coordination with a mobility anchor point in an overlay via<br>
encapsulation. The Connexion by Boeing experience showed that dynamic<br>
routing protocol updates do not scale in the global Internet. The<br>
AERO/OMNI services instead minimize routing protocol disturbance<br>
while using efficient mobility signaling in the overlay.<br>
<br>
18) Section 5.2, near the end, remove the following sentence: &quot;IP<br>
tunneling over the wireless link should be avoided for performance<br>
efficiency.&quot;<br>
<br>
Reason: IP tunneling is used only in support of global-scoped IPv6<br>
communication (not local-scoped) and can use effective header<br>
compression for greater efficiency as in AERO/OMNI. In addition,<br>
there is value in using encapsulation both from the standpoint of<br>
minimizing global routing protocol overhead and by accommodating<br>
path MTU diversity (see below).<br>
<br>
19) Add a new Section 5.3 as follows:<br>
&quot;5.3 Accommodating MTU Diversity<br>
<br>
The wireless and/or wired-line links in paths between both mobile<br>
nodes and fixed network correspondents may configure a variety of<br>
Maximum Transmission Units (MTUs), where all IPv6 links are required<br>
to support a minimum MTU of 1280 octets and MAY support larger MTUs.<br>
Unfortunately, determining the path MTU (i.e., the minimum link MTU<br>
in the path) has proven to be inefficient and unreliable due to the<br>
uncertain nature of the loss-oriented ICMPv6 messaging service used<br>
for path MTU discovery. Recent developments have produced a more<br>
reliable path MTU determination service for TCP [RFC4821] and UDP<br>
[RFC8899] however the MTUs discovered are always limited by the most<br>
restrictive link MTU in the path (often 1500 octets or smaller).<br>
<br>
The AERO/OMNI service addresses the MTU issue by introducing a new<br>
layer in the Internet architecture known as the &quot;OMNI Adaptation Layer=
<br>
(OAL)&quot;. The OAL allows end systems that configure an OMNI interface<br=
>
to utilize a full 65535 octet MTU by leveraging the IPv6 fragmentation<br>
and reassembly service during encapsulation to produce fragment sizes<br>
that are assured of traversing the path without loss due to a<br>
size restriction. (This allows end systems to send packets that are<br>
often much larger than the actual path MTU.)<br>
<br>
Performance studies over the course of many decades have proven that<br>
applications will see greater performance by sending smaller numbers<br>
of large packets (as opposed to larger numbers of small packets) even<br>
if fragmentation is needed. The OAL further supports even larger packet<br>
sizes through the IP Parcels construct [I-D.templin-intarea-parcels]<br>
which provides &quot;packet-in-packet&quot; encapsulation for a total size =
up<br>
to 4MB. Together, the OAL and IP Parcels will provide a revolutionary<br>
new capability for greater efficiency in both mobile and fixed networks.&qu=
ot;<br>
<br>
20) Appendix B, add the following as a final paragraph:<br>
&quot;AERO and OMNI together securely and efficiently address the following=
<br>
6 M&#39;s of Modern Internetworking for mobile V2V, V2I and V2X Clients:<br=
>
<br>
=C2=A0 =C2=A01.=C2=A0 Multilink: A Client&#39;s ability to coordinate multi=
ple diverse<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0underlying data links as a single logical unit (=
i.e., the OMNI<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0interface) to achieve the required communication=
s performance and<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0reliability objectives.<br>
<br>
=C2=A0 =C2=A02.=C2=A0 Multinet: The ability to span the OMNI link over a se=
gment<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0routing topology with multiple diverse administr=
ative domain<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0network segments while maintaining seamless E2E =
communications<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0between mobile Clients and correspondents such a=
s air traffic<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0controllers and fleet administrators.<br>
<br>
=C2=A0 =C2=A03.=C2=A0 Mobility: A Client&#39;s ability to change network po=
ints of<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0attachment (e.g., moving between wireless base s=
tations) which<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0may result in an underlying interface address ch=
ange without<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0disruptions to ongoing communication sessions wi=
th peers over the<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0OMNI link.<br>
<br>
=C2=A0 =C2=A04.=C2=A0 Multicast: The ability to send a single network trans=
mission that<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0reaches multiple Clients belonging to the same i=
nterest group<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0without disturbing other Clients not subscribed =
to the interest<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0group.<br>
<br>
=C2=A0 =C2=A05.=C2=A0 Multihop: A mobile Client&#39;s V2V relaying capabili=
ty useful when<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0multiple forwarding hops between vehicles may be=
 necessary to<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0reach back to an infrastructure access point con=
nection to the<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0OMNI link.<br>
<br>
=C2=A0 =C2=A06.=C2=A0 MTU Assurance: The ability to deliver packets of vari=
ous robust<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0sizes between peers without loss due to a link s=
ize restriction,<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0and to dynamically adjust packet sizes in order =
to achieve the<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0optimal performance for each independent traffic=
 flow.&quot;<br>
</blockquote></div></div>
</div>-- <br><div dir=3D"ltr" class=3D"gmail_signature" data-smartmail=3D"g=
mail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><div><div dir=3D"ltr=
"><div><div dir=3D"ltr">=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>Mr. Jaehoon (Paul) Jeong, Ph.D.<br>Associ=
ate Professor</div><div dir=3D"ltr">Department Head<br>Department of Comput=
er Science and Engineering<br>Sungkyunkwan University<br>Office: +82-31-299=
-4957<br>Email: <a href=3D"mailto:pauljeong@skku.edu" style=3D"font-size:12=
.8px" target=3D"_blank">pauljeong@skku.edu</a>,=C2=A0<a href=3D"mailto:jaeh=
oon.paul@gmail.com" target=3D"_blank">jaehoon.paul@gmail.com</a><br>Persona=
l Homepage: <a href=3D"http://cpslab.skku.edu/people-jaehoon-jeong.php" tar=
get=3D"_blank">http://iotlab.skku.edu/people-jaehoon-jeong.php</a><br></div=
></div></div></div></div></div></div></div>

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Cc: "Pascal Thubert (pthubert)" <pthubert@cisco.com>, "housley@vigilsec.com" <housley@vigilsec.com>,  "jaehoon.paul@gmail.com" <jaehoon.paul@gmail.com>, "its@ietf.org" <its@ietf.org>,  "Dirk.von-Hugo@telekom.de" <Dirk.von-Hugo@telekom.de>
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Fred,

I cannot find (via some light Google searching) any reference to an
industry standard understanding of these "6 Ms".  If we're going to set
down Principles of Networking like this I wonder if we should try to get
more review or maybe look for some academic citation even.

If there is existing literature on this I'd be interested to read it.

Thanks,
-Erik

On Thu, Feb 24, 2022 at 12:51 PM Templin (US), Fred L <
Fred.L.Templin@boeing.com> wrote:

> All, see below for my comments on
> 'draft-ietf-ipwave-vehicular-networking-26.txt'.
> It might be worth noting that my colleagues and I have been looking at
> vehicular
> communications use cases for a long time (e.g., see: RANGERS [RFC6139]).
>
> Indeed, support for vehicular communications of all forms (land, sea, air,
> space)
> has long been the driving force behind the AERO and OMNI technologies which
> have taken their current shape as a result. Please see below for comments
> and
> make corresponding changes to the document.
>
> Fred Templin
>
> ---
>
> Comments on 'draft-ietf-ipwave-vehicular-networking-26.txt':
> **************************************************
> 1) Section 1, change: "Asymmetric Extended Route Optimization (AERO)
> [I-D.templin-6man-aero]"
> to:
> "Automatic Extended Route Optimization based on the Overlay Multilink
> Network Interface (AERO/OMNI)
> [I-D.templin-6man-aero][I-D.templin-6man-omni]".
>
> 2) Section 3, change: "The use cases presented in this section serve as
> the description and motivation for the need to extend IPv6 and its
> protocols
> to facilitate "Vehicular IPv6"."
> to:
> "The use cases presented in this section serve as the description and
> motivation
> for the need to augment IPv6 and its protocols to facilitate "Vehicular
> IPv6"."
>
> 3) Section 3.2, change the paragraph beginning: "The existing IPv6 protocol
> must be augmented through protocol changes..."
> to:
> "The existing IPv6 protocol must be augmented either through protocol
> changes
> or by including a new adaptation layer in the architecture that efficiently
> maps IPv6 to a diversity of link layer technologies. Augmentation is
> necessary
> to support wireless multihop V2I communications in a highway where RSUs are
> sparsely deployed, so a vehicle can reach the wireless coverage of an RSU
> through the multihop data forwarding of intermediate vehicles."
>
> 4) Section 3.3, change the paragraph beginning: "The existing IPv6 protocol
> must be augmented through protocol changes..."
> to:
> "The existing IPv6 protocol must be augmented through protocol changes or
> by including a new adaptation layer in the architecture that efficiently
> maps IPv6 to a diversity of underlying link layer technologies.
> Augmentation
> is necessary to support wireless multihop V2X or V2I2X communications in an
> urban road network where RSUs are deployed at intersections, so a vehicle
> (or a pedestrian's smartphone) can reach the wireless coverage of an RSU
> through the multihop data forwarding of intermediate vehicles (or
> pedestrians'
> smartphones) as packet forwarders."
>
> 5) Section 4.1, second paragraph, change: "OMNI (Overlay Multilink Network
> Interface) [I-D.templin-6man-omni]"
> to:
> "AERO/OMNI [I-D.templin-6man-aero][I-D.templin-6man-omni]".
>
> 6) Section 4.1, third paragraph, change: "Furthermore, the wireless
> media interfaces are autoconfigured with a global IPv6 prefix
> (e.g., 2001:DB8:1:1::/64) to support both V2V and V2I networking. Note
> that 2001:DB8::/32 is a documentation prefix [RFC3849] for example
> prefixes in this document, and also that any routable IPv6 address
> needs to be routable in a VANET and a vehicular network including IP-RSUs."
> to:
> "In a first addressing alternative, the wireless media interfaces
> are autoconfigured with a global IPv6 prefix (e.g., 2001:DB8:1:1::/64)
> to support both V2V and V2I networking. Note that 2001:DB8::/32 is a
> documentation prefix [RFC3849] for example prefixes in this document,
> and also that any routable IPv6 address needs to be routable in a VANET
> and a vehicular network including IP-RSUs. In a second alternative, each
> wireless media interface is configured with an IPv6 Unique Local Address
> (ULA) [RFC4193] that is assured unique within the vehicular network
> according to AERO/OMNI and [RFC5889]. The ULA supports both V2V and V2I
> multihop forwarding within the vehicular network (e.g., via a VANET
> routing protocol) while each vehicle can communicate with Internet
> correspondents using global IPv6 addresses via OMNI interface
> encapsulation over the wireless interface."
>
> 7) Section 4.1, fifth paragraph, change: "Alternatively, mobile nodes
> can employ a "Bring-Your-Own-Addresses (BYOA)" technique using their
> own IPv6 Unique Local Addresses (ULAs) [RFC4193] over the wireless
> network, which does not require the messaging (e.g., Duplicate Address
> Detection (DAD)) of IPv6 Stateless Address Autoconfiguration (SLAAC)
> [RFC4862]."
> to:
> "Alternatively, mobile nodes can configure IPv6 Unique Local Addresses
> (ULAs) according AERO/OMNI then support global communications through
> OMNI interface encapsulation and forwarding of packets with MNP-based
> global IPv6 addresses over the wireless networks. The use of AERO/OMNI
> ULA autoconfiguration assures uniqueness such that Duplicate Address
> Detection (DAD) of IPv6 Stateless Address Autoconfiguration (SLAAC)
> [RFC4862] is not needed."
>
> 8) Section 4.2, add the following as a final paragraph:
> "In a second alternative when vehicles configure an OMNI interface over
> an underlying VANET based on ULA addressing, the global IPv6 addresses
> covered by the MNP on-board the vehicle are not injected into the VANET
> routing system but instead traverse the VANET in the forwarding plane
> via OMNI encapsulation. This allows each vehicle to maintain a constant
> and unchanging MNP delegation even as it moves between IP-RSUs. This
> avoids any need for vehicle on-board network renumbering due to
> mobility and avoids repeated injections and withdrawals of MNP
> prefixes within the VANET."
>
> 9) Section 4.3, add new paragraph following paragraph beginning
> "Figure 3 shows the internetworking" as follows:
> "When two vehicles within a ULA-based VANET need to communicate without
> the assistance of any infrastructure, they can exchange unencapsulated
> IPv6 packets with ULA-based addresses which will be forwarded according
> to the VANET routing protocol. Alternatively, the vehicles can use OMNI
> interface encapsulation to exchange IPv6 packets with global addresses
> taken from their respective MNPs. The encapsulation source and destination
> ULAs are algorithmically bound to the IPv6 source and destination global
> addresses which allows for stateless encapsulation address determination."
>
> 10) Section 4.3, final paragraph, there is no reason to cite as examples
> all RFC variants of the OLSR protocol and all extensions of the DLEP
> protocol - pick one (or at most 2) RFCs for each. Also, it is important
> to state that standard OSPF routing has been optimized to support MANET
> applications. Suggested rewrite:
> "...which serves MANET routing protocols such as the different versions
> of Optimized Link State Routing Protocol (OLSR) [RFC3626][RFC7181], Open
> Shortest Path First (OSPF) derivatives (e.g., [RFC5614]) and the Dynamic
> Link Exchange Protocol (DLEP) [RFC8175] with its extensions."
>
> 11) Section 5.1, second paragraph, change: "they need to be configured
> with a link-local IPv6 address or a global IPv6 address"
> to:
> "they need to be configured with link-local, unique-local and/or global
> IPv6 addresses"
>
> 12) Section 5.2, third paragraph, change: "An efficient DAD is required
> to reduce the overhead of the DAD packets during a vehicle's travel in
> a road network"
> to:
> "DAD is not needed in networks that follow the OMNI ULA autoconfiguration
> procedures. In other cases when DAD is needed, it must be made efficient
> to reduce the overhead of the DAD packets during a vehicle's travel in
> a road network"
>
> 13) Section 5.1.1, third paragraph, change: "There is a relationship
> between a link and a prefix, besides the different scopes that are
> expected from the link-local and global types of IPv6 addresses."
> to:
> "There is a relationship between a link and a prefix, besides the
> different scopes that are expected from the link-local, unique-local
> and global types of IPv6 addresses."
>
> 14) Section 5.1.1, add a new second-to-last paragraph as follows:
> "Often when two VANETs merge some vehicles may configure addresses from
> a first subnet prefix while other vehicles configure addresses from other
> subnet prefixes. These merge events must not interfere with the
> vehicle-to-vehicle multihop forwarding necessary to support continuous
> communications. Additionally, when a vehicle enters the network for the
> first time it may need to use a temporary ULA address in initial messages
> to negotiate with an IP-RSU for an address within the subnet. The VANET
> must therefore provide (short-term) forwarding for vehicles with foreign
> addresses, while the subnet prefix serves as an aggregation point of
> reference for a particular IP-RSU without impeding multihop forwarding
> between vehicles that may belong to different subnets."
>
> 15) Section 5.1.3 goes too far in expanding on RPL. It is based on the
> claim that: "However, it will be costly to run both vehicular ND and a
> vehicular ad hoc routing protocol in terms of control traffic overhead
> [RFC9119].". But, the AERO/OMNI approach uses only the MANET routing
> protocol control messages at the subnet level then applies unicast-only
> IPv6 ND messaging at the OMNI interface level so that there is no traffic
> amplification due to multicast IPv6 ND within the subnet. Therefore, a
> new third paragraph telling how it works in AERO/OMNI should be added
> as follows:
> "The AERO/OMNI approach avoids this issue by using MANET routing protocols
> only (i.e., and no multicast IPv6 ND messaging) in the wireless network
> underlay while applying efficient unicast IPv6 ND messaging in the OMNI
> overlay on an as-needed basis for router discovery and NUD. This greatly
> reduces the overhead for VANET-wide multicasting while providing agile
> accommodation for dynamic topology changes."
>
> Additionally, the RPL text should be reduced by at least 50%.
>
> 16) Section 5.2, paragraph 6 change: "Even though the SLAAC with classic
> ND costs a DAD during mobility management, the SLAAC with [RFC8505] does
> not cost a DAD."
> to:
> "Even though classic IPv6 ND requires the use of DAD on many link types
> during mobility management, address autoconfiguration based on [RFC8505]
> and/or AERO/OMNI does not require DAD."
>
> 17) Section 5.2, paragraph 6, remove the following text entirely:
> "On the other hand, a BYOA does not allow such direct routability
> to the Internet since the BYOA is not topologically correct, that is,
> not routable in the Internet. In addition, a vehicle configured with
> a BYOA needs a tunnel home (e.g., IP-RSU) connected to the Internet,
> and the vehicle needs to know which neighboring vehicle is reachable
> inside the VANET toward the tunnel home. There is nonnegligible control
> overhead to set up and maintain routes to such a tunnel home over
> the VANET."
>
> Reason: There is always a cost for maintaining mobility management
> for addresses within an MNP. It can be done either by frequent
> advertisements/withdrawals of the MNP in the global routing system or
> through coordination with a mobility anchor point in an overlay via
> encapsulation. The Connexion by Boeing experience showed that dynamic
> routing protocol updates do not scale in the global Internet. The
> AERO/OMNI services instead minimize routing protocol disturbance
> while using efficient mobility signaling in the overlay.
>
> 18) Section 5.2, near the end, remove the following sentence: "IP
> tunneling over the wireless link should be avoided for performance
> efficiency."
>
> Reason: IP tunneling is used only in support of global-scoped IPv6
> communication (not local-scoped) and can use effective header
> compression for greater efficiency as in AERO/OMNI. In addition,
> there is value in using encapsulation both from the standpoint of
> minimizing global routing protocol overhead and by accommodating
> path MTU diversity (see below).
>
> 19) Add a new Section 5.3 as follows:
> "5.3 Accommodating MTU Diversity
>
> The wireless and/or wired-line links in paths between both mobile
> nodes and fixed network correspondents may configure a variety of
> Maximum Transmission Units (MTUs), where all IPv6 links are required
> to support a minimum MTU of 1280 octets and MAY support larger MTUs.
> Unfortunately, determining the path MTU (i.e., the minimum link MTU
> in the path) has proven to be inefficient and unreliable due to the
> uncertain nature of the loss-oriented ICMPv6 messaging service used
> for path MTU discovery. Recent developments have produced a more
> reliable path MTU determination service for TCP [RFC4821] and UDP
> [RFC8899] however the MTUs discovered are always limited by the most
> restrictive link MTU in the path (often 1500 octets or smaller).
>
> The AERO/OMNI service addresses the MTU issue by introducing a new
> layer in the Internet architecture known as the "OMNI Adaptation Layer
> (OAL)". The OAL allows end systems that configure an OMNI interface
> to utilize a full 65535 octet MTU by leveraging the IPv6 fragmentation
> and reassembly service during encapsulation to produce fragment sizes
> that are assured of traversing the path without loss due to a
> size restriction. (This allows end systems to send packets that are
> often much larger than the actual path MTU.)
>
> Performance studies over the course of many decades have proven that
> applications will see greater performance by sending smaller numbers
> of large packets (as opposed to larger numbers of small packets) even
> if fragmentation is needed. The OAL further supports even larger packet
> sizes through the IP Parcels construct [I-D.templin-intarea-parcels]
> which provides "packet-in-packet" encapsulation for a total size up
> to 4MB. Together, the OAL and IP Parcels will provide a revolutionary
> new capability for greater efficiency in both mobile and fixed networks."
>
> 20) Appendix B, add the following as a final paragraph:
> "AERO and OMNI together securely and efficiently address the following
> 6 M's of Modern Internetworking for mobile V2V, V2I and V2X Clients:
>
>    1.  Multilink: A Client's ability to coordinate multiple diverse
>        underlying data links as a single logical unit (i.e., the OMNI
>        interface) to achieve the required communications performance and
>        reliability objectives.
>
>    2.  Multinet: The ability to span the OMNI link over a segment
>        routing topology with multiple diverse administrative domain
>        network segments while maintaining seamless E2E communications
>        between mobile Clients and correspondents such as air traffic
>        controllers and fleet administrators.
>
>    3.  Mobility: A Client's ability to change network points of
>        attachment (e.g., moving between wireless base stations) which
>        may result in an underlying interface address change without
>        disruptions to ongoing communication sessions with peers over the
>        OMNI link.
>
>    4.  Multicast: The ability to send a single network transmission that
>        reaches multiple Clients belonging to the same interest group
>        without disturbing other Clients not subscribed to the interest
>        group.
>
>    5.  Multihop: A mobile Client's V2V relaying capability useful when
>        multiple forwarding hops between vehicles may be necessary to
>        reach back to an infrastructure access point connection to the
>        OMNI link.
>
>    6.  MTU Assurance: The ability to deliver packets of various robust
>        sizes between peers without loss due to a link size restriction,
>        and to dynamically adjust packet sizes in order to achieve the
>        optimal performance for each independent traffic flow."
>

--000000000000ba8f4805d8cc5f44
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Fred,<div><br></div><div>I cannot find (via some light Goo=
gle searching) any reference to an industry standard understanding of these=
 &quot;6 Ms&quot;.=C2=A0 If we&#39;re going to set down Principles of Netwo=
rking like this I wonder if we should try to get more review or maybe look =
for some academic citation even.<br></div><div><br></div><div>If there is e=
xisting literature on this I&#39;d be interested to read it.</div><div><br>=
</div><div>Thanks,</div><div>-Erik</div></div><br><div class=3D"gmail_quote=
"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Feb 24, 2022 at 12:51 PM Te=
mplin (US), Fred L &lt;<a href=3D"mailto:Fred.L.Templin@boeing.com">Fred.L.=
Templin@boeing.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote=
" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);=
padding-left:1ex">All, see below for my comments on &#39;draft-ietf-ipwave-=
vehicular-networking-26.txt&#39;.<br>
It might be worth noting that my colleagues and I have been looking at vehi=
cular<br>
communications use cases for a long time (e.g., see: RANGERS [RFC6139]).<br=
>
<br>
Indeed, support for vehicular communications of all forms (land, sea, air, =
space)<br>
has long been the driving force behind the AERO and OMNI technologies which=
<br>
have taken their current shape as a result. Please see below for comments a=
nd<br>
make corresponding changes to the document.<br>
<br>
Fred Templin<br>
<br>
---<br>
<br>
Comments on &#39;draft-ietf-ipwave-vehicular-networking-26.txt&#39;:<br>
**************************************************<br>
1) Section 1, change: &quot;Asymmetric Extended Route Optimization (AERO)<b=
r>
[I-D.templin-6man-aero]&quot;<br>
to:<br>
&quot;Automatic Extended Route Optimization based on the Overlay Multilink<=
br>
Network Interface (AERO/OMNI) [I-D.templin-6man-aero][I-D.templin-6man-omni=
]&quot;.<br>
<br>
2) Section 3, change: &quot;The use cases presented in this section serve a=
s<br>
the description and motivation for the need to extend IPv6 and its protocol=
s<br>
to facilitate &quot;Vehicular IPv6&quot;.&quot;<br>
to:<br>
&quot;The use cases presented in this section serve as the description and =
motivation<br>
for the need to augment IPv6 and its protocols to facilitate &quot;Vehicula=
r IPv6&quot;.&quot;<br>
<br>
3) Section 3.2, change the paragraph beginning: &quot;The existing IPv6 pro=
tocol<br>
must be augmented through protocol changes...&quot;<br>
to:<br>
&quot;The existing IPv6 protocol must be augmented either through protocol =
changes<br>
or by including a new adaptation layer in the architecture that efficiently=
<br>
maps IPv6 to a diversity of link layer technologies. Augmentation is necess=
ary<br>
to support wireless multihop V2I communications in a highway where RSUs are=
<br>
sparsely deployed, so a vehicle can reach the wireless coverage of an RSU<b=
r>
through the multihop data forwarding of intermediate vehicles.&quot;<br>
<br>
4) Section 3.3, change the paragraph beginning: &quot;The existing IPv6 pro=
tocol<br>
must be augmented through protocol changes...&quot;<br>
to:<br>
&quot;The existing IPv6 protocol must be augmented through protocol changes=
 or<br>
by including a new adaptation layer in the architecture that efficiently<br=
>
maps IPv6 to a diversity of underlying link layer technologies. Augmentatio=
n<br>
is necessary to support wireless multihop V2X or V2I2X communications in an=
<br>
urban road network where RSUs are deployed at intersections, so a vehicle<b=
r>
(or a pedestrian&#39;s smartphone) can reach the wireless coverage of an RS=
U<br>
through the multihop data forwarding of intermediate vehicles (or pedestria=
ns&#39;<br>
smartphones) as packet forwarders.&quot;<br>
<br>
5) Section 4.1, second paragraph, change: &quot;OMNI (Overlay Multilink Net=
work<br>
Interface) [I-D.templin-6man-omni]&quot;<br>
to:<br>
&quot;AERO/OMNI [I-D.templin-6man-aero][I-D.templin-6man-omni]&quot;.<br>
<br>
6) Section 4.1, third paragraph, change: &quot;Furthermore, the wireless<br=
>
media interfaces are autoconfigured with a global IPv6 prefix<br>
(e.g., 2001:DB8:1:1::/64) to support both V2V and V2I networking. Note<br>
that 2001:DB8::/32 is a documentation prefix [RFC3849] for example<br>
prefixes in this document, and also that any routable IPv6 address<br>
needs to be routable in a VANET and a vehicular network including IP-RSUs.&=
quot;<br>
to:<br>
&quot;In a first addressing alternative, the wireless media interfaces<br>
are autoconfigured with a global IPv6 prefix (e.g., 2001:DB8:1:1::/64)<br>
to support both V2V and V2I networking. Note that 2001:DB8::/32 is a<br>
documentation prefix [RFC3849] for example prefixes in this document,<br>
and also that any routable IPv6 address needs to be routable in a VANET<br>
and a vehicular network including IP-RSUs. In a second alternative, each<br=
>
wireless media interface is configured with an IPv6 Unique Local Address<br=
>
(ULA) [RFC4193] that is assured unique within the vehicular network<br>
according to AERO/OMNI and [RFC5889]. The ULA supports both V2V and V2I<br>
multihop forwarding within the vehicular network (e.g., via a VANET<br>
routing protocol) while each vehicle can communicate with Internet<br>
correspondents using global IPv6 addresses via OMNI interface<br>
encapsulation over the wireless interface.&quot;<br>
<br>
7) Section 4.1, fifth paragraph, change: &quot;Alternatively, mobile nodes<=
br>
can employ a &quot;Bring-Your-Own-Addresses (BYOA)&quot; technique using th=
eir<br>
own IPv6 Unique Local Addresses (ULAs) [RFC4193] over the wireless<br>
network, which does not require the messaging (e.g., Duplicate Address<br>
Detection (DAD)) of IPv6 Stateless Address Autoconfiguration (SLAAC)<br>
[RFC4862].&quot;<br>
to:<br>
&quot;Alternatively, mobile nodes can configure IPv6 Unique Local Addresses=
<br>
(ULAs) according AERO/OMNI then support global communications through<br>
OMNI interface encapsulation and forwarding of packets with MNP-based<br>
global IPv6 addresses over the wireless networks. The use of AERO/OMNI<br>
ULA autoconfiguration assures uniqueness such that Duplicate Address<br>
Detection (DAD) of IPv6 Stateless Address Autoconfiguration (SLAAC)<br>
[RFC4862] is not needed.&quot;<br>
<br>
8) Section 4.2, add the following as a final paragraph:<br>
&quot;In a second alternative when vehicles configure an OMNI interface ove=
r<br>
an underlying VANET based on ULA addressing, the global IPv6 addresses<br>
covered by the MNP on-board the vehicle are not injected into the VANET<br>
routing system but instead traverse the VANET in the forwarding plane<br>
via OMNI encapsulation. This allows each vehicle to maintain a constant<br>
and unchanging MNP delegation even as it moves between IP-RSUs. This<br>
avoids any need for vehicle on-board network renumbering due to<br>
mobility and avoids repeated injections and withdrawals of MNP<br>
prefixes within the VANET.&quot;<br>
<br>
9) Section 4.3, add new paragraph following paragraph beginning<br>
&quot;Figure 3 shows the internetworking&quot; as follows:<br>
&quot;When two vehicles within a ULA-based VANET need to communicate withou=
t<br>
the assistance of any infrastructure, they can exchange unencapsulated<br>
IPv6 packets with ULA-based addresses which will be forwarded according<br>
to the VANET routing protocol. Alternatively, the vehicles can use OMNI<br>
interface encapsulation to exchange IPv6 packets with global addresses<br>
taken from their respective MNPs. The encapsulation source and destination<=
br>
ULAs are algorithmically bound to the IPv6 source and destination global<br=
>
addresses which allows for stateless encapsulation address determination.&q=
uot;<br>
<br>
10) Section 4.3, final paragraph, there is no reason to cite as examples<br=
>
all RFC variants of the OLSR protocol and all extensions of the DLEP<br>
protocol - pick one (or at most 2) RFCs for each. Also, it is important<br>
to state that standard OSPF routing has been optimized to support MANET<br>
applications. Suggested rewrite:<br>
&quot;...which serves MANET routing protocols such as the different version=
s<br>
of Optimized Link State Routing Protocol (OLSR) [RFC3626][RFC7181], Open<br=
>
Shortest Path First (OSPF) derivatives (e.g., [RFC5614]) and the Dynamic<br=
>
Link Exchange Protocol (DLEP) [RFC8175] with its extensions.&quot;<br>
<br>
11) Section 5.1, second paragraph, change: &quot;they need to be configured=
<br>
with a link-local IPv6 address or a global IPv6 address&quot;<br>
to:<br>
&quot;they need to be configured with link-local, unique-local and/or globa=
l<br>
IPv6 addresses&quot;<br>
<br>
12) Section 5.2, third paragraph, change: &quot;An efficient DAD is require=
d<br>
to reduce the overhead of the DAD packets during a vehicle&#39;s travel in<=
br>
a road network&quot;<br>
to:<br>
&quot;DAD is not needed in networks that follow the OMNI ULA autoconfigurat=
ion<br>
procedures. In other cases when DAD is needed, it must be made efficient<br=
>
to reduce the overhead of the DAD packets during a vehicle&#39;s travel in<=
br>
a road network&quot;<br>
<br>
13) Section 5.1.1, third paragraph, change: &quot;There is a relationship<b=
r>
between a link and a prefix, besides the different scopes that are<br>
expected from the link-local and global types of IPv6 addresses.&quot;<br>
to:<br>
&quot;There is a relationship between a link and a prefix, besides the <br>
different scopes that are expected from the link-local, unique-local<br>
and global types of IPv6 addresses.&quot;<br>
<br>
14) Section 5.1.1, add a new second-to-last paragraph as follows:<br>
&quot;Often when two VANETs merge some vehicles may configure addresses fro=
m<br>
a first subnet prefix while other vehicles configure addresses from other<b=
r>
subnet prefixes. These merge events must not interfere with the<br>
vehicle-to-vehicle multihop forwarding necessary to support continuous<br>
communications. Additionally, when a vehicle enters the network for the<br>
first time it may need to use a temporary ULA address in initial messages<b=
r>
to negotiate with an IP-RSU for an address within the subnet. The VANET<br>
must therefore provide (short-term) forwarding for vehicles with foreign<br=
>
addresses, while the subnet prefix serves as an aggregation point of<br>
reference for a particular IP-RSU without impeding multihop forwarding<br>
between vehicles that may belong to different subnets.&quot;<br>
<br>
15) Section 5.1.3 goes too far in expanding on RPL. It is based on the<br>
claim that: &quot;However, it will be costly to run both vehicular ND and a=
<br>
vehicular ad hoc routing protocol in terms of control traffic overhead<br>
[RFC9119].&quot;. But, the AERO/OMNI approach uses only the MANET routing<b=
r>
protocol control messages at the subnet level then applies unicast-only<br>
IPv6 ND messaging at the OMNI interface level so that there is no traffic<b=
r>
amplification due to multicast IPv6 ND within the subnet. Therefore, a<br>
new third paragraph telling how it works in AERO/OMNI should be added<br>
as follows:<br>
&quot;The AERO/OMNI approach avoids this issue by using MANET routing proto=
cols<br>
only (i.e., and no multicast IPv6 ND messaging) in the wireless network<br>
underlay while applying efficient unicast IPv6 ND messaging in the OMNI<br>
overlay on an as-needed basis for router discovery and NUD. This greatly<br=
>
reduces the overhead for VANET-wide multicasting while providing agile<br>
accommodation for dynamic topology changes.&quot;<br>
<br>
Additionally, the RPL text should be reduced by at least 50%.<br>
<br>
16) Section 5.2, paragraph 6 change: &quot;Even though the SLAAC with class=
ic<br>
ND costs a DAD during mobility management, the SLAAC with [RFC8505] does<br=
>
not cost a DAD.&quot;<br>
to:<br>
&quot;Even though classic IPv6 ND requires the use of DAD on many link type=
s<br>
during mobility management, address autoconfiguration based on [RFC8505]<br=
>
and/or AERO/OMNI does not require DAD.&quot;<br>
<br>
17) Section 5.2, paragraph 6, remove the following text entirely:<br>
&quot;On the other hand, a BYOA does not allow such direct routability<br>
to the Internet since the BYOA is not topologically correct, that is,<br>
not routable in the Internet. In addition, a vehicle configured with<br>
a BYOA needs a tunnel home (e.g., IP-RSU) connected to the Internet,<br>
and the vehicle needs to know which neighboring vehicle is reachable<br>
inside the VANET toward the tunnel home. There is nonnegligible control<br>
overhead to set up and maintain routes to such a tunnel home over<br>
the VANET.&quot;<br>
<br>
Reason: There is always a cost for maintaining mobility management<br>
for addresses within an MNP. It can be done either by frequent<br>
advertisements/withdrawals of the MNP in the global routing system or<br>
through coordination with a mobility anchor point in an overlay via<br>
encapsulation. The Connexion by Boeing experience showed that dynamic<br>
routing protocol updates do not scale in the global Internet. The<br>
AERO/OMNI services instead minimize routing protocol disturbance<br>
while using efficient mobility signaling in the overlay.<br>
<br>
18) Section 5.2, near the end, remove the following sentence: &quot;IP<br>
tunneling over the wireless link should be avoided for performance<br>
efficiency.&quot;<br>
<br>
Reason: IP tunneling is used only in support of global-scoped IPv6<br>
communication (not local-scoped) and can use effective header<br>
compression for greater efficiency as in AERO/OMNI. In addition,<br>
there is value in using encapsulation both from the standpoint of<br>
minimizing global routing protocol overhead and by accommodating<br>
path MTU diversity (see below).<br>
<br>
19) Add a new Section 5.3 as follows:<br>
&quot;5.3 Accommodating MTU Diversity<br>
<br>
The wireless and/or wired-line links in paths between both mobile<br>
nodes and fixed network correspondents may configure a variety of<br>
Maximum Transmission Units (MTUs), where all IPv6 links are required<br>
to support a minimum MTU of 1280 octets and MAY support larger MTUs.<br>
Unfortunately, determining the path MTU (i.e., the minimum link MTU<br>
in the path) has proven to be inefficient and unreliable due to the<br>
uncertain nature of the loss-oriented ICMPv6 messaging service used<br>
for path MTU discovery. Recent developments have produced a more<br>
reliable path MTU determination service for TCP [RFC4821] and UDP<br>
[RFC8899] however the MTUs discovered are always limited by the most<br>
restrictive link MTU in the path (often 1500 octets or smaller).<br>
<br>
The AERO/OMNI service addresses the MTU issue by introducing a new<br>
layer in the Internet architecture known as the &quot;OMNI Adaptation Layer=
<br>
(OAL)&quot;. The OAL allows end systems that configure an OMNI interface<br=
>
to utilize a full 65535 octet MTU by leveraging the IPv6 fragmentation<br>
and reassembly service during encapsulation to produce fragment sizes<br>
that are assured of traversing the path without loss due to a<br>
size restriction. (This allows end systems to send packets that are<br>
often much larger than the actual path MTU.)<br>
<br>
Performance studies over the course of many decades have proven that<br>
applications will see greater performance by sending smaller numbers<br>
of large packets (as opposed to larger numbers of small packets) even<br>
if fragmentation is needed. The OAL further supports even larger packet<br>
sizes through the IP Parcels construct [I-D.templin-intarea-parcels]<br>
which provides &quot;packet-in-packet&quot; encapsulation for a total size =
up<br>
to 4MB. Together, the OAL and IP Parcels will provide a revolutionary<br>
new capability for greater efficiency in both mobile and fixed networks.&qu=
ot;<br>
<br>
20) Appendix B, add the following as a final paragraph:<br>
&quot;AERO and OMNI together securely and efficiently address the following=
<br>
6 M&#39;s of Modern Internetworking for mobile V2V, V2I and V2X Clients:<br=
>
<br>
=C2=A0 =C2=A01.=C2=A0 Multilink: A Client&#39;s ability to coordinate multi=
ple diverse<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0underlying data links as a single logical unit (=
i.e., the OMNI<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0interface) to achieve the required communication=
s performance and<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0reliability objectives.<br>
<br>
=C2=A0 =C2=A02.=C2=A0 Multinet: The ability to span the OMNI link over a se=
gment<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0routing topology with multiple diverse administr=
ative domain<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0network segments while maintaining seamless E2E =
communications<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0between mobile Clients and correspondents such a=
s air traffic<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0controllers and fleet administrators.<br>
<br>
=C2=A0 =C2=A03.=C2=A0 Mobility: A Client&#39;s ability to change network po=
ints of<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0attachment (e.g., moving between wireless base s=
tations) which<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0may result in an underlying interface address ch=
ange without<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0disruptions to ongoing communication sessions wi=
th peers over the<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0OMNI link.<br>
<br>
=C2=A0 =C2=A04.=C2=A0 Multicast: The ability to send a single network trans=
mission that<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0reaches multiple Clients belonging to the same i=
nterest group<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0without disturbing other Clients not subscribed =
to the interest<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0group.<br>
<br>
=C2=A0 =C2=A05.=C2=A0 Multihop: A mobile Client&#39;s V2V relaying capabili=
ty useful when<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0multiple forwarding hops between vehicles may be=
 necessary to<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0reach back to an infrastructure access point con=
nection to the<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0OMNI link.<br>
<br>
=C2=A0 =C2=A06.=C2=A0 MTU Assurance: The ability to deliver packets of vari=
ous robust<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0sizes between peers without loss due to a link s=
ize restriction,<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0and to dynamically adjust packet sizes in order =
to achieve the<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0optimal performance for each independent traffic=
 flow.&quot;<br>
</blockquote></div>

--000000000000ba8f4805d8cc5f44--


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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
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Thread-Topic: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: Erik Kline <ek.ietf@gmail.com>
CC: "Pascal Thubert (pthubert)" <pthubert@cisco.com>, "housley@vigilsec.com" <housley@vigilsec.com>, "jaehoon.paul@gmail.com" <jaehoon.paul@gmail.com>, "its@ietf.org" <its@ietf.org>, "Dirk.von-Hugo@telekom.de" <Dirk.von-Hugo@telekom.de>
Thread-Topic: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
Thread-Index: Adgqc/ODHqNCprdfR0uKSeBlBnBn7g==
Date: Fri, 25 Feb 2022 18:20:57 +0000
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: Erik Kline <ek.ietf@gmail.com>
CC: "Pascal Thubert (pthubert)" <pthubert@cisco.com>, "housley@vigilsec.com" <housley@vigilsec.com>, "jaehoon.paul@gmail.com" <jaehoon.paul@gmail.com>, "its@ietf.org" <its@ietf.org>, "Dirk.von-Hugo@telekom.de" <Dirk.von-Hugo@telekom.de>
Thread-Topic: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Date: Fri, 25 Feb 2022 18:38:26 +0000
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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From: Rex Buddenberg <buddenbergr@gmail.com>
To: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>, Erik Kline <ek.ietf@gmail.com>
Cc: "Pascal Thubert (pthubert)" <pthubert@cisco.com>, "housley@vigilsec.com" <housley@vigilsec.com>, "jaehoon.paul@gmail.com" <jaehoon.paul@gmail.com>,  "its@ietf.org" <its@ietf.org>, "Dirk.von-Hugo@telekom.de" <Dirk.von-Hugo@telekom.de>
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Fred,

Wish I'd gotten this organized conception when I was still teaching
such subjects. Belongs in textbooks.

b

On Fri, 2022-02-25 at 18:20 +0000, Templin (US), Fred L wrote:
> Erik, the only place I know of that you will find the “6M’s”
> discussed are in AERO/OMNI
> themselves. Those documents are currently in the RFC ISE queue, but
> could probably
> serve the community better if they were brought into an IETF working
> group and/or
> advanced through some other standards-track publication approach. Any
> thoughts?
>  
> Thanks - Fred
>  
> From: Erik Kline [mailto:ek.ietf@gmail.com] 
> Sent: Thursday, February 24, 2022 3:59 PM
> To: Templin (US), Fred L <Fred.L.Templin@boeing.com>
> Cc: Pascal Thubert (pthubert) <pthubert@cisco.com>; housley@vigilsec.
> com; jaehoon.paul@gmail.com; its@ietf.org; Dirk.von-Hugo@telekom.de
> Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-
> networking-26.txt
>  
> Fred,
>  
> I cannot find (via some light Google searching) any reference to an
> industry standard understanding of these "6 Ms".  If we're going to
> set down Principles of Networking like this I wonder if we should try
> to get more review or maybe look for some academic citation even.
>  
> If there is existing literature on this I'd be interested to read it.
>  
> Thanks,
> -Erik
>  
> On Thu, Feb 24, 2022 at 12:51 PM Templin (US), Fred L <Fred.L.Templin
> @boeing.com> wrote:
> All, see below for my comments on 'draft-ietf-ipwave-vehicular-
> networking-26.txt'.
> It might be worth noting that my colleagues and I have been looking
> at vehicular
> communications use cases for a long time (e.g., see: RANGERS
> [RFC6139]).
> 
> Indeed, support for vehicular communications of all forms (land, sea,
> air, space)
> has long been the driving force behind the AERO and OMNI technologies
> which
> have taken their current shape as a result. Please see below for
> comments and
> make corresponding changes to the document.
> 
> Fred Templin
> 
> ---
> 
> Comments on 'draft-ietf-ipwave-vehicular-networking-26.txt':
> **************************************************
> 1) Section 1, change: "Asymmetric Extended Route Optimization (AERO)
> [I-D.templin-6man-aero]"
> to:
> "Automatic Extended Route Optimization based on the Overlay Multilink
> Network Interface (AERO/OMNI) [I-D.templin-6man-aero][I-D.templin-
> 6man-omni]".
> 
> 2) Section 3, change: "The use cases presented in this section serve
> as
> the description and motivation for the need to extend IPv6 and its
> protocols
> to facilitate "Vehicular IPv6"."
> to:
> "The use cases presented in this section serve as the description and
> motivation
> for the need to augment IPv6 and its protocols to facilitate
> "Vehicular IPv6"."
> 
> 3) Section 3.2, change the paragraph beginning: "The existing IPv6
> protocol
> must be augmented through protocol changes..."
> to:
> "The existing IPv6 protocol must be augmented either through protocol
> changes
> or by including a new adaptation layer in the architecture that
> efficiently
> maps IPv6 to a diversity of link layer technologies. Augmentation is
> necessary
> to support wireless multihop V2I communications in a highway where
> RSUs are
> sparsely deployed, so a vehicle can reach the wireless coverage of an
> RSU
> through the multihop data forwarding of intermediate vehicles."
> 
> 4) Section 3.3, change the paragraph beginning: "The existing IPv6
> protocol
> must be augmented through protocol changes..."
> to:
> "The existing IPv6 protocol must be augmented through protocol
> changes or
> by including a new adaptation layer in the architecture that
> efficiently
> maps IPv6 to a diversity of underlying link layer technologies.
> Augmentation
> is necessary to support wireless multihop V2X or V2I2X communications
> in an
> urban road network where RSUs are deployed at intersections, so a
> vehicle
> (or a pedestrian's smartphone) can reach the wireless coverage of an
> RSU
> through the multihop data forwarding of intermediate vehicles (or
> pedestrians'
> smartphones) as packet forwarders."
> 
> 5) Section 4.1, second paragraph, change: "OMNI (Overlay Multilink
> Network
> Interface) [I-D.templin-6man-omni]"
> to:
> "AERO/OMNI [I-D.templin-6man-aero][I-D.templin-6man-omni]".
> 
> 6) Section 4.1, third paragraph, change: "Furthermore, the wireless
> media interfaces are autoconfigured with a global IPv6 prefix
> (e.g., 2001:DB8:1:1::/64) to support both V2V and V2I networking.
> Note
> that 2001:DB8::/32 is a documentation prefix [RFC3849] for example
> prefixes in this document, and also that any routable IPv6 address
> needs to be routable in a VANET and a vehicular network including IP-
> RSUs."
> to:
> "In a first addressing alternative, the wireless media interfaces
> are autoconfigured with a global IPv6 prefix (e.g.,
> 2001:DB8:1:1::/64)
> to support both V2V and V2I networking. Note that 2001:DB8::/32 is a
> documentation prefix [RFC3849] for example prefixes in this document,
> and also that any routable IPv6 address needs to be routable in a
> VANET
> and a vehicular network including IP-RSUs. In a second alternative,
> each
> wireless media interface is configured with an IPv6 Unique Local
> Address
> (ULA) [RFC4193] that is assured unique within the vehicular network
> according to AERO/OMNI and [RFC5889]. The ULA supports both V2V and
> V2I
> multihop forwarding within the vehicular network (e.g., via a VANET
> routing protocol) while each vehicle can communicate with Internet
> correspondents using global IPv6 addresses via OMNI interface
> encapsulation over the wireless interface."
> 
> 7) Section 4.1, fifth paragraph, change: "Alternatively, mobile nodes
> can employ a "Bring-Your-Own-Addresses (BYOA)" technique using their
> own IPv6 Unique Local Addresses (ULAs) [RFC4193] over the wireless
> network, which does not require the messaging (e.g., Duplicate
> Address
> Detection (DAD)) of IPv6 Stateless Address Autoconfiguration (SLAAC)
> [RFC4862]."
> to:
> "Alternatively, mobile nodes can configure IPv6 Unique Local
> Addresses
> (ULAs) according AERO/OMNI then support global communications through
> OMNI interface encapsulation and forwarding of packets with MNP-based
> global IPv6 addresses over the wireless networks. The use of
> AERO/OMNI
> ULA autoconfiguration assures uniqueness such that Duplicate Address
> Detection (DAD) of IPv6 Stateless Address Autoconfiguration (SLAAC)
> [RFC4862] is not needed."
> 
> 8) Section 4.2, add the following as a final paragraph:
> "In a second alternative when vehicles configure an OMNI interface
> over
> an underlying VANET based on ULA addressing, the global IPv6
> addresses
> covered by the MNP on-board the vehicle are not injected into the
> VANET
> routing system but instead traverse the VANET in the forwarding plane
> via OMNI encapsulation. This allows each vehicle to maintain a
> constant
> and unchanging MNP delegation even as it moves between IP-RSUs. This
> avoids any need for vehicle on-board network renumbering due to
> mobility and avoids repeated injections and withdrawals of MNP
> prefixes within the VANET."
> 
> 9) Section 4.3, add new paragraph following paragraph beginning
> "Figure 3 shows the internetworking" as follows:
> "When two vehicles within a ULA-based VANET need to communicate
> without
> the assistance of any infrastructure, they can exchange
> unencapsulated
> IPv6 packets with ULA-based addresses which will be forwarded
> according
> to the VANET routing protocol. Alternatively, the vehicles can use
> OMNI
> interface encapsulation to exchange IPv6 packets with global
> addresses
> taken from their respective MNPs. The encapsulation source and
> destination
> ULAs are algorithmically bound to the IPv6 source and destination
> global
> addresses which allows for stateless encapsulation address
> determination."
> 
> 10) Section 4.3, final paragraph, there is no reason to cite as
> examples
> all RFC variants of the OLSR protocol and all extensions of the DLEP
> protocol - pick one (or at most 2) RFCs for each. Also, it is
> important
> to state that standard OSPF routing has been optimized to support
> MANET
> applications. Suggested rewrite:
> "...which serves MANET routing protocols such as the different
> versions
> of Optimized Link State Routing Protocol (OLSR) [RFC3626][RFC7181],
> Open
> Shortest Path First (OSPF) derivatives (e.g., [RFC5614]) and the
> Dynamic
> Link Exchange Protocol (DLEP) [RFC8175] with its extensions."
> 
> 11) Section 5.1, second paragraph, change: "they need to be
> configured
> with a link-local IPv6 address or a global IPv6 address"
> to:
> "they need to be configured with link-local, unique-local and/or
> global
> IPv6 addresses"
> 
> 12) Section 5.2, third paragraph, change: "An efficient DAD is
> required
> to reduce the overhead of the DAD packets during a vehicle's travel
> in
> a road network"
> to:
> "DAD is not needed in networks that follow the OMNI ULA
> autoconfiguration
> procedures. In other cases when DAD is needed, it must be made
> efficient
> to reduce the overhead of the DAD packets during a vehicle's travel
> in
> a road network"
> 
> 13) Section 5.1.1, third paragraph, change: "There is a relationship
> between a link and a prefix, besides the different scopes that are
> expected from the link-local and global types of IPv6 addresses."
> to:
> "There is a relationship between a link and a prefix, besides the 
> different scopes that are expected from the link-local, unique-local
> and global types of IPv6 addresses."
> 
> 14) Section 5.1.1, add a new second-to-last paragraph as follows:
> "Often when two VANETs merge some vehicles may configure addresses
> from
> a first subnet prefix while other vehicles configure addresses from
> other
> subnet prefixes. These merge events must not interfere with the
> vehicle-to-vehicle multihop forwarding necessary to support
> continuous
> communications. Additionally, when a vehicle enters the network for
> the
> first time it may need to use a temporary ULA address in initial
> messages
> to negotiate with an IP-RSU for an address within the subnet. The
> VANET
> must therefore provide (short-term) forwarding for vehicles with
> foreign
> addresses, while the subnet prefix serves as an aggregation point of
> reference for a particular IP-RSU without impeding multihop
> forwarding
> between vehicles that may belong to different subnets."
> 
> 15) Section 5.1.3 goes too far in expanding on RPL. It is based on
> the
> claim that: "However, it will be costly to run both vehicular ND and
> a
> vehicular ad hoc routing protocol in terms of control traffic
> overhead
> [RFC9119].". But, the AERO/OMNI approach uses only the MANET routing
> protocol control messages at the subnet level then applies unicast-
> only
> IPv6 ND messaging at the OMNI interface level so that there is no
> traffic
> amplification due to multicast IPv6 ND within the subnet. Therefore,
> a
> new third paragraph telling how it works in AERO/OMNI should be added
> as follows:
> "The AERO/OMNI approach avoids this issue by using MANET routing
> protocols
> only (i.e., and no multicast IPv6 ND messaging) in the wireless
> network
> underlay while applying efficient unicast IPv6 ND messaging in the
> OMNI
> overlay on an as-needed basis for router discovery and NUD. This
> greatly
> reduces the overhead for VANET-wide multicasting while providing
> agile
> accommodation for dynamic topology changes."
> 
> Additionally, the RPL text should be reduced by at least 50%.
> 
> 16) Section 5.2, paragraph 6 change: "Even though the SLAAC with
> classic
> ND costs a DAD during mobility management, the SLAAC with [RFC8505]
> does
> not cost a DAD."
> to:
> "Even though classic IPv6 ND requires the use of DAD on many link
> types
> during mobility management, address autoconfiguration based on
> [RFC8505]
> and/or AERO/OMNI does not require DAD."
> 
> 17) Section 5.2, paragraph 6, remove the following text entirely:
> "On the other hand, a BYOA does not allow such direct routability
> to the Internet since the BYOA is not topologically correct, that is,
> not routable in the Internet. In addition, a vehicle configured with
> a BYOA needs a tunnel home (e.g., IP-RSU) connected to the Internet,
> and the vehicle needs to know which neighboring vehicle is reachable
> inside the VANET toward the tunnel home. There is nonnegligible
> control
> overhead to set up and maintain routes to such a tunnel home over
> the VANET."
> 
> Reason: There is always a cost for maintaining mobility management
> for addresses within an MNP. It can be done either by frequent
> advertisements/withdrawals of the MNP in the global routing system or
> through coordination with a mobility anchor point in an overlay via
> encapsulation. The Connexion by Boeing experience showed that dynamic
> routing protocol updates do not scale in the global Internet. The
> AERO/OMNI services instead minimize routing protocol disturbance
> while using efficient mobility signaling in the overlay.
> 
> 18) Section 5.2, near the end, remove the following sentence: "IP
> tunneling over the wireless link should be avoided for performance
> efficiency."
> 
> Reason: IP tunneling is used only in support of global-scoped IPv6
> communication (not local-scoped) and can use effective header
> compression for greater efficiency as in AERO/OMNI. In addition,
> there is value in using encapsulation both from the standpoint of
> minimizing global routing protocol overhead and by accommodating
> path MTU diversity (see below).
> 
> 19) Add a new Section 5.3 as follows:
> "5.3 Accommodating MTU Diversity
> 
> The wireless and/or wired-line links in paths between both mobile
> nodes and fixed network correspondents may configure a variety of
> Maximum Transmission Units (MTUs), where all IPv6 links are required
> to support a minimum MTU of 1280 octets and MAY support larger MTUs.
> Unfortunately, determining the path MTU (i.e., the minimum link MTU
> in the path) has proven to be inefficient and unreliable due to the
> uncertain nature of the loss-oriented ICMPv6 messaging service used
> for path MTU discovery. Recent developments have produced a more
> reliable path MTU determination service for TCP [RFC4821] and UDP
> [RFC8899] however the MTUs discovered are always limited by the most
> restrictive link MTU in the path (often 1500 octets or smaller).
> 
> The AERO/OMNI service addresses the MTU issue by introducing a new
> layer in the Internet architecture known as the "OMNI Adaptation
> Layer
> (OAL)". The OAL allows end systems that configure an OMNI interface
> to utilize a full 65535 octet MTU by leveraging the IPv6
> fragmentation
> and reassembly service during encapsulation to produce fragment sizes
> that are assured of traversing the path without loss due to a
> size restriction. (This allows end systems to send packets that are
> often much larger than the actual path MTU.)
> 
> Performance studies over the course of many decades have proven that
> applications will see greater performance by sending smaller numbers
> of large packets (as opposed to larger numbers of small packets) even
> if fragmentation is needed. The OAL further supports even larger
> packet
> sizes through the IP Parcels construct [I-D.templin-intarea-parcels]
> which provides "packet-in-packet" encapsulation for a total size up
> to 4MB. Together, the OAL and IP Parcels will provide a revolutionary
> new capability for greater efficiency in both mobile and fixed
> networks."
> 
> 20) Appendix B, add the following as a final paragraph:
> "AERO and OMNI together securely and efficiently address the
> following
> 6 M's of Modern Internetworking for mobile V2V, V2I and V2X Clients:
> 
>    1.  Multilink: A Client's ability to coordinate multiple diverse
>        underlying data links as a single logical unit (i.e., the OMNI
>        interface) to achieve the required communications performance
> and
>        reliability objectives.
> 
>    2.  Multinet: The ability to span the OMNI link over a segment
>        routing topology with multiple diverse administrative domain
>        network segments while maintaining seamless E2E communications
>        between mobile Clients and correspondents such as air traffic
>        controllers and fleet administrators.
> 
>    3.  Mobility: A Client's ability to change network points of
>        attachment (e.g., moving between wireless base stations) which
>        may result in an underlying interface address change without
>        disruptions to ongoing communication sessions with peers over
> the
>        OMNI link.
> 
>    4.  Multicast: The ability to send a single network transmission
> that
>        reaches multiple Clients belonging to the same interest group
>        without disturbing other Clients not subscribed to the
> interest
>        group.
> 
>    5.  Multihop: A mobile Client's V2V relaying capability useful
> when
>        multiple forwarding hops between vehicles may be necessary to
>        reach back to an infrastructure access point connection to the
>        OMNI link.
> 
>    6.  MTU Assurance: The ability to deliver packets of various
> robust
>        sizes between peers without loss due to a link size
> restriction,
>        and to dynamically adjust packet sizes in order to achieve the
>        optimal performance for each independent traffic flow."
> _______________________________________________
> its mailing list
> its@ietf.org
> https://www.ietf.org/mailman/listinfo/its


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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
To: Rex Buddenberg <buddenbergr@gmail.com>, Erik Kline <ek.ietf@gmail.com>
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Thread-Topic: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Date: Fri, 25 Feb 2022 19:33:27 +0000
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Subject: Re: [ipwave] I-D Action: draft-ietf-ipwave-vehicular-networking-26.txt
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Reviewer: Pascal Thubert
Review result: Ready with Issues

I am an assigned INT directorate reviewer for
draft-ietf-ipwave-vehicular-networking-27. These comments were written
primarily for the benefit of the Internet Area Directors. Document editors and
shepherd(s) should treat these comments just like they would treat comments
from any other IETF contributors and resolve them along with any other Last
Call comments that have been received. For more details on the INT Directorate,
see https://datatracker.ietf.org/group/intdir/about/
<https://datatracker.ietf.org/group/intdir/about/>.

Based on my review, the document IS ready to go to IETF Last Call and therefore
CAN be forwarded to the IESG.

I find the document well written, well referenced, and very informative. It
fits the general goal of use-cases and problem statement publication.

The following are other issues I found with this document that SHOULD be
corrected before publication:

Fig 1 and section 4.1 show a “Corresponding Node”. Not sure where the term
comes from, in NMIP and NEMO it is “Correspondent Node”  see and refer to RFC
4885.

About
Section 3.1: “
   To support applications of these V2I use cases, the required
   functions of IPv6 include IPv6-based packet exchange, transport-layer
   session continuity, and secure, safe communication between a vehicle
   and an infrastructure node (e.g., IP-RSU) in the vehicular network.

“
Section 3.2: “   To support applications of these V2I use cases, the required
   functions of IPv6 include IPv6-based packet exchange, transport-layer
   session continuity, and secure, safe communication between a vehicle
   and an infrastructure node (e.g., IP-RSU) in the vehicular network.
”
Section 3.3:
“
   To support applications of these V2X use cases, the required
   functions of IPv6 include IPv6-based packet exchange, transport-layer
   session continuity, and secure, safe communication between a vehicle
   and a pedestrian either directly or indirectly via an IP-RSU.

“
Each time, the text could clarify what goes in “packet exchange” since as
written that seems to refer to data plane while the problem for IP is mostly
control plane. e.g., the problem of discovering adjacent peers (addresses,
networks) should be listed there shouldn’t it? Addressing is an topic of
interest as well (BYO Address/Prefix vs. obtain a local address, how that
relates with DAD and global connectivity). The doc discusses that heavily
(around 5.1) and then there’s the discussion in 4.3 on ND variations and
(MANET) NHDP, that must happen before IPv6 packets can be exchanged.

As a hint, a suggestion can be:
“
… functions of IPv6 include IPv6 communication enablement with neighborhood
discovery and IPv6 address management, reachability with adapted network models
and routing methods, transport-layer … “

Section 3.2

Fred said ‘
3) Section 3.2, change the paragraph beginning: "The existing IPv6 protocol
must be augmented through protocol changes..."
to:
"The existing IPv6 protocol must be augmented either through protocol changes
or by including a new adaptation layer in the architecture that efficiently
maps IPv6 to a diversity of link layer technologies. Augmentation is necessary
to support wireless multihop V2I communications in a highway where RSUs are
sparsely deployed, so a vehicle can reach the wireless coverage of an RSU
through the multihop data forwarding of intermediate vehicles."
‘

I agree that the document omits V2V2I completely. This is true in Fred’s
highway case, but true also in a simple parking lot to share Wi-Fi access when
the AP is too far. In the MIPv6 family we called that nested NEMO. The problem
statement of nested NEMO is RFC 4888. I believe you need to provide a minimum
of hint that V2V2I exists and for the lack of more reference you can search
“nested NEMO”.

Note that the early RPL was a solution for nested NEMO and interworked with
NEMO. It has been tested successfully by NASA at their Glenn Center but I do
not think something was published at the time, so no ref.

Note that I also agree with Fred’s point on 3.3. Maybe you can make it more
verbose but in each case there’s a need to indicate that V2A2B can exist and
needs future attention, even if it is a harder problem.


Section 4.1:
“
In
   this case, a handover for Vehicle2 needs to be performed by either a
   host-based mobility management scheme (e.g., MIPv6 [RFC6275] …
…
“
Section 4.2:

“
  Existing network architectures, such as the network architectures of
   PMIPv6 [RFC5213] …
“

I see you have a reference to NEMO in the introduction, but this is where the
reference makes the most sense and it is missing, next to PMIPv6.

It is easy to confuse network-based mobility (which is PMIPv6 vs. MIPv6, and is
MIPv4 anyway) and network mobility, which is the case of a car that has a /64
inside and has to handle mobility for the /64.

Indeed NEMO is the MIPv6 for networks (a mobile prefix inside the car vs.
MIP/PMIP which is a host address moving) and vehicles where a main use case for
it. PMIPv6 is a variation of MIPv6 that distributes the roles differently for
the lack of support by end devices, but does not route for a mobile prefix.
Network-based does not mean “mobile network”, and then you often call the
mobile network a moving network, again per RFC 4885.

For the latter, please stick to IETF terminology of “mobile network” as in RFC
3963, that will help the reader. I suggest you reference RFC 3963 here, and add
RFC 4888 for completeness.

Section 4.1:

“
  Alternatively, mobile nodes
   can employ a "Bring-Your-Own-Addresses (BYOA)" technique using their
   own IPv6 Unique Local Addresses (ULAs) [RFC4193] over the wireless
   network, which does not require the messaging (e.g., Duplicate
   Address Detection (DAD)) of IPv6 Stateless Address Autoconfiguration
   (SLAAC) [RFC4862].
“
Again listing Bring your own prefix a well as address would improve
completeness. A typical car has a mobile prefix inside.

Section 4.2:

“
OMNI can support the
“

Suggest “OMNI is designed to support” unless there’s an actual reference?

Section 4.3
Fred says “
Section 4.3, final paragraph, there is no reason to cite as examples all RFC
variants of the OLSR protocol and all extensions of the DLEP protocol - pick
one (or at most 2) RFCs for each. Also, it is important to state that standard
OSPF routing has been optimized to support MANET applications. Suggested
rewrite: "...which serves MANET routing protocols such as the different
versions of Optimized Link State Routing Protocol (OLSR) [RFC3626][RFC7181],
Open Shortest Path First (OSPF) derivatives (e.g., [RFC5614]) and the Dynamic
Link Exchange Protocol (DLEP) [RFC8175] with its extensions."

“
I agree. Maybe mention that there are V2V use case with a fixed set of cars
(platooning) and others with variable neighborhood (parking lot, on the road),
and the optimum solution may vary.

Section 5:

“is 72 seconds” looks precise though in fact it is very rough. Could say “in
the order of a minute”. Same for V2V, 36s.

Section 5.1.1

“off-link”

That terminology does not really exist. All we have is “not-onlink”.

Section 5.2

“There is nonnegligible
   control overhead to set up and maintain routes to such a tunnel home
   over the VANET.”

There again a link to RFC 4888

“Vehicles can use the TCC as their Home Network having a home agent
   for mobility management as in MIPv6 [RFC6275] and PMIPv6 [RFC5213],”

add “and NEMO [RFC 3963]”

Appendix A: Mentions OMNI but fails to document real world implemented
protocols such as DLEP which abstract the radio modem over ethernet

The following are minor issues (typos, misspelling, minor text improvements)
with the document:

Section 5.1:
“
   This merging and partitioning should be considered for the
   IPv6 ND such as IPv6 Stateless Address Autoconfiguration (SLAAC)
   [RFC4862].
“
“
they may not communicate with each other not in one
   hop in the same

“
I can understand but the language seems incorrect. Also Fred says:
‘
change: "they need to be configured with a link-local IPv6 address or a global
IPv6 address" to: "they need to be configured with link-local, unique-local
and/or global IPv6 addresses"

‘
I mostly agree but then, those addresses are not necessarily configured. Maybe
just says that they need the addresses.

Section 6.1

“the DAD”: we usually do not have the “the”. This appears throughout.




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From: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
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Thread-Topic: [ipwave] Intdir telechat review of draft-ietf-ipwave-vehicular-networking-27
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From: "Pascal Thubert (pthubert)" <pthubert@cisco.com>
To: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
CC: "int-dir@ietf.org" <int-dir@ietf.org>, "last-call@ietf.org" <last-call@ietf.org>, "draft-ietf-ipwave-vehicular-networking.all@ietf.org" <draft-ietf-ipwave-vehicular-networking.all@ietf.org>, "its@ietf.org" <its@ietf.org>
Thread-Topic: [ipwave] Intdir telechat review of draft-ietf-ipwave-vehicular-networking-27
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Date: Mon, 28 Feb 2022 18:48:49 +0000
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Subject: Re: [ipwave] Intdir telechat review of draft-ietf-ipwave-vehicular-networking-27
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