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From l2vpn-bounces@ietf.org  Fri Dec 10 16:41:08 2004
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The minutes for the Washington DC meeting are below.

Many thanks to Mustapha Aissaoui and Cheng-Yin Lee for taking notes.

Rick


-------------------------------------------------------------------------=
----

L2 VPN Working Group Meeting
Nov. 9, 2004 Washington DC

Chairs:   Vach Kompella
          Loa Andersen
          Rick Wilder


1. Agenda

1. Agenda bashing

2. Working group status (10 min)
   draft-ietf-l2vpn-l2-framework-05.txt
   draft-ietf-l2vpn-vpls-bgp-02.txt
   draft-ietf-l2vpn-vpls-ldp-05.txt
   draft-ietf-l2vpn-requirements-01.txt
   chairs

3. Working group documents - Author/ Editor feedback (15 min)
   draft-ietf-l2vpn-vpls-ldp-applic-00.txt
   Marc Lasserre
   draft-ietf-l2vpn-signaling-01.txt
   Eric Rosen
   draft-ietf-l2vpn-arp-mediation-00.txt
   Himanshu Shah
   draft-ietf-l2vpn-ipls-01.txt
   Himanshu Shah
   draft-ietf-l2vpn-oam-req-frmk-01.txt
   Dinesh Mohan

4. Radius based L2VPN's (20 min)
   draft-ietf-l2vpn-radius-pe-discovery-00.txt
   draft-ietf-l2vpn-l2tp-radius-vpls-00.txt
   Note: Drafts has dated, but it is the intention have this update anywa=
y
   Greg Weber

5. Supporting IP Multicast over VPLS (10 min)
   <draft-serbest-multicast-vpls>=20
   Yetik Serbest=20

6. OAM Procedures for VPWS Interworking (10 min)
   <draft-aissaoui-l2vpn-vpws-iw-oam-02.txt>=20
   Mustapha Aissaoui

7. VPLS Interoperability with CE Bridges(10 min)
   <draft-sajassi-l2vpn-vpls-bridge-interop-00.txt>=20
   Ali Sajassi

8. Multicast in BGP/MPLS VPNs and VPLS(10 min)
   draft-raggarwa-l3vpn-mvpn-vpls-mcast-00.txt=20
   Rahul Aggarwal

9. Testing Hierarchical Virtual Private LAN Services (10 min)
   <draft-stokes-vkompella-l2vpn-hvpls-oam-00.txt>
   Vach Kompella

10. Meeting closes

2. Working Group status reported by Vach Kompella

- draft-ietf-l2vpn-l2-framework-05.txt:  Sent to IESG, in RFC editor=92s =
queue
- draft-ietf-l2vpn-vpls-bgp-02.txt: IDR review done. Minor PWE3 dependenc=
y.
- draft-ietf-l2vpn-vpls-ldp-05.txt:  Minor PWE3 dependency.
- draft-ietf-l2vpn-requirements-03.txt: publication requested

3. Author/Editor feedback on Working Group Documents

VPLS Applicability =96 Marc Lassere

draft-ietf-l2vpn-vpls-ldp-applic-00.txt=20

Document updated to address comments received. Ethernet to VPLS migration=
 scenarios added
and alignment with IEEE 802.1ad (VLAN translation). Further comments soli=
cited from
mailing list.

Provisioning Models and Endpoint Identifiers in L2VPN Signaling =96 Eric =
Rosen
draft-ietf-l2vpn-signaling-01.txt

A new revision of this document will be produced. Dependencies to and fro=
m this document
will be checked.


ARP Mediation for IP Interworking of Layer 2VPN - Himanshu Shah

draft-ietf-l2vpn-arp-mediation-00.txt

Author stated that this draft was multiple independent implementations wi=
th demonstrated
interoperability.=20

IANA value assignment needed to support CE address TLV.

IP-Only LAN Service (IPLS) =96 Himanshu Shah

	draft-ietf-l2vpn-ipls-01.txt

No new updates, but feedback has been received and updates planned for BG=
P-based
signaling, clarification of MAC-to-IP address learning, and support for o=
ther traffic, eg
IPv6, IS-IS. These may be addressed in a future draft.

4. VPLS OAM Requirements and Framework  - Dinesh Mohan
draft-ietf-l2vpn-oam-req-frmk-01.txt

Since previous revision: have added reference to BGP-based VPLS, clarifie=
d client-server
relationship, updated normative/informative references.

Next steps: address VPWS OAM requirements and framework.

Discussion:  Joel Halpern thought this was a well-written draft but thoug=
ht this applied
to an end-to-end Ethernet service. He does not think that the IETF should=
 tell the IEEE
requirements for Ethernet OAM.=20

Extensive discussion followed of whether this draft is within the WG scop=
e. Further
clarification  is needed of the VPLS-specific nature of the requirements =
to resolve this
issue. Vach thought this document contains out of scope material because =
it goes beyond
VPLS (learning, PW encapsulation) into Q-in-Q.=20
Dave suggested that we focus the document on how to make sure that end-to=
-end emulated
Ethernet service is not compromised by the VPLS service. Thus, VPLS OAM r=
equirements
should be about making sure that it does not break end-to-end service cha=
racteristics and
OAM. This discussion will continue on the mailing list.

5. Radius/L2TP based VPLS=20
draft-ietf-l2vpn-radius-pe-discovery-00.txt, Greg Weber
draft-ietf-l2vpn-l2tp-radius-vpls-00.txt, Mark Townsley.

The drafts have expired, but the authors intend to publish new versions.=20

Loa: Even if new versions are not done, it is correct to re-submit the dr=
afts to keep
them alive.

Current document focus was narrow as it only addressed VPLS. It does not =
take advantage
of new RADIUS CoA extensions as in RFC3576.=20
Future updates: generalize to VPWS. Allow stateless operation.=20
Author walked over an example of transactions for VPWS and VPLS. To reduc=
e the number of
transactions, some can be collapsed. Radius accounting messages may be us=
ed for billing.=20
Author requests feedback before making updates

Discussion
Ali Sajassi  thinks that this work should continue and drafts should be u=
pdated. Himanshu
Shah had a question on how this interacts with NM systems which do the co=
nfigurations in
today=92s networks. Yakov Rector thought that the new value in Mark=92s p=
roposal was for AC
configuration and authentication. Network side has been addressed by othe=
r protocols,
e.g., BGP.

Chairs suggested that detailed discussion should take place when Mark pos=
ts his draft. At
that time, we will now if we can retire draft-ietf-l2vpn-l2tp-radius-vpls=
-00.tx.
6. Supporting IP Multicast over VPLS =96 Yetik Serbest
draft-serbest-multicast-vpls-00.txt

Current VPLS behavior is to flood frames for destination MAC addresses wh=
ich have not
been learnt and for multicast and broadcast destination MAC addresses.=20
An objectives of this draft is to not send frames where there are no rece=
ivers who  need
it.=20
Solution is based on snooping IGMP and/or PIM.=20
Author walked through an example of IPTV in SBC network. Proposal is made=
 to solve the
traffic duplication problem: detect it and drop the traffic coming from/t=
o the AC/PW.=20
Author requests comments.

Discussion: Alignment with Multicast work in L3VPN is needed. How about m=
ixed router/host
network? Also, there is a bug in the description of the BATR PIM support.=
 Support for
IPv6 is another thing missing in this draft. How does PIM refresh reducti=
on fit? Can
snooping be relied upon? The draft should describe the overhead of PIM sn=
ooping.=20
Discussion is to continue on the mailing list.

7. OAM Procedures for VPWS Interworking =96 Mustapha Aissaoui
draft-aissaoui-l2vpn-vpws-iw-oam-01.txt

This draft specifies the procedures for OAM interworking for the followin=
g VPWS: IP L2
interworking (ARP-mediation), FR-ATM interworking (FRF8.2), Ethernet inte=
rworking.
It complements draft-ietf-pwe3-oam-msg-map-01.txt, which covers the homog=
eneous VPWS.
Addressed three issues raised by coauthors.=20

Issue 1: Defect loop operation. Single emulated end-to-end loop versus mu=
ltiple coupled
loops.
settled on a modified "coupled loop" model which we believe works in all =
scenarios
addressed in the draft.

Issue 2: Should the receipt of a defect in the reverse direction of a rem=
ote AC or a PW
result in a different action at a PE? we analyzed the defects for all sce=
narios in the
draft and we have now updated the text to treat this as a separate defect.

Issue 3: Check the behavior in the case of L2TPv3 PSN Updated PW defect h=
andling
procedures using StopCCN and CDN messages after discussion with Mark Town=
sley in
San-Diego.
Next steps: Add support for inband fault notification based on BFD. Autho=
rs would like to
make this document a Working Group draft and progress it as the basis for=
 OAM for IP L2
Interworking work item. Sent message to mailing list to request more feed=
back.

Vach asked to make the additional updates and then make a call for WG doc=
ument.

8. VPLS Interoperability with CE Bridges =96 Ali Sajassi
draft-sajassi-l2vpn-vpls-bridge-interop-00.txt

VPLS is a bridged LAN service which can also support CE bridges. There wa=
s not much data
plane discussion in the VPLS work in L2VPN WG. Most of the work and discu=
ssions centered
on the data plane and control plane over the IP/MPLS network. There are a=
 number of
service types defined for bridges in IEEE which are not covered by the VP=
LS drafts.=20

Bridge interoperability issues: CE bridge protocol handling; customer net=
work topology
changes; redundancy; MAC address scalability; partial mesh PWs; multicast=
 traffic;
interoperability with 802.1ad bridges.

Further discussion of this draft to take place on the mailing list.

9. Multicast in BGP/MPLS VPNs and VPLS =96 Rahul Aggarwal
draft-raggarwa-l3vpn-mvpn-vpls-mcast-00.txt

Issues with existing VPLS proposals include: no PIM peering between CE an=
d PE, nor
between PEs. VPLS makes use of ingress replication by the PE. Also traffi=
c is sent to
sites with no receivers. PIM/IGMP snooping is a possible approach, but re=
quires PIM join
suppression to be disabled by VPLS customers. Problem is snooping needs t=
o be performed
at AC and PW sides.=20
Proposed solution is trying to address the above issues with common trade=
-offs for L3 VPN
and VPLS. IGMP/PIM snooping is not performed for remote sites. Use of mul=
ticast tree
which can be shared across multiple VPLS instances. It can makes use of P=
IM-SM, PIM-SSM,
or p2mp TE LSPs.  Author illustrated how this works through an example.

Feedback requested from the email list.


10. Testing Hierarchical Virtual Private LAN Services =96 Vach Kompella

draft-stokes-vkompella-l2vpn-hvpls-oam-00.txt


Updates since last revision (draft expired and is renamed):  Added two mo=
des of
identifying and detecting OAM messages. Router Alert label at bottom of l=
abel stack and
control word based one (PWE3 PID).
Relation to OAM framework: OAM for a service carrying ethernet packets. S=
ervice operates
at a layer below the Ethernet packets. Wants to refer to framework to mak=
e sure that
end-to-end Ethernet OAM is not broken.  Author to provide updates to mail=
 list for
further discussion.







From l2vpn-bounces@ietf.org  Mon Dec 13 12:47:36 2004
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From: Rick Wilder <rick@rhwilder.net>
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Apologies to Yakov Rekhter for the misspelling of his last name in the Washington DC
minutes. I'm sending a correction for the proceedings.

Rick





