OAM%20Procedures%20for%20VPWS%20Interworking%20draft-aissaoui-l2vpn-vpws-iw-oam-02%20Mustapha%20A

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OAM Procedures for VPWS Interworkingdraft-aissaou
i-l2vpn-vpws-iw-oam-02Mustapha Aïssaoui,
Matthew Bocci, David Watkinson, AlcatelHamid
Ould-Brahim, Mike Loomis, David Allan,
NortelThomas D. Nadeau, Monique Morrow, Cisco
SystemsJohn Z. Yu, Hammerhead SystemsHimanshu
Shah, CienaPaul Doolan, Mangrove SystemsPeter
Busschbach, Lucent Technologies
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Scope

• This draft specifies the procedures for OAM
  interworking for the following VPWS
• IP L2 interworking (ARP-mediation)
• FR-ATM interworking (FRF8.2)
• Ethernet interworking
• It complements draft-ietf-pwe3-oam-msg-map-01.txt,
  which covers the homogeneous VPWS

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Changes from Revision 01

• Addressed three issues raised by coauthors
• Issue 1 Defect loop operation
• Single emulated end-to-end loop versus multiple
  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 remote AC or a PW result in a
  different action at a PE?
• we analyzed the defects for all scenarios 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 handling procedures using
  StopCCN and CDN messages after discussion with
  Mark Townsley in San-Diego

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Next Steps

• Add support for inband fault notification based
  on BFD
• Authors would like to make this document a
  Working Group draft
• Progress as the basis for OAM for IP L2
  Interworking work item
• Sent message to mailing list to request more
  feedback