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Yuji Kamite (NTT Communications) Yuichiro Wada (NTT Communications) Yetik Serbest (SBC)

Requirements for Multicast Support in Virtual Private LAN Services draft-kamite-l2vpn-vpls-mcast-reqts-00.txt. Yuji Kamite (NTT Communications) Yuichiro Wada (NTT Communications) Yetik Serbest (SBC) Thomas Morin (France Telecom) Luyuan Fang (AT&T). Overview. Motivation

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Yuji Kamite (NTT Communications) Yuichiro Wada (NTT Communications) Yetik Serbest (SBC)

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  1. Requirements for Multicast Support in Virtual Private LAN Servicesdraft-kamite-l2vpn-vpls-mcast-reqts-00.txt Yuji Kamite (NTT Communications) Yuichiro Wada (NTT Communications)Yetik Serbest (SBC) Thomas Morin (France Telecom) Luyuan Fang (AT&T) 63rd IETF Paris August 2005

  2. Overview • Motivation • Multicast scalability issue • Technical challenges in existing VPLS -- emerging expectation toward multicast application today • Various solutions are proposed • Need requirement documentation as a basis • This drafts is to: • Clarify issues in multicast VPLS • Describe specific requirements in multicast VPLS • Guide multicast VPLS solution design 63rd IETF Paris August 2005

  3. Multicast Challenges in VPLS (1/2) • Issue A: Replication to non-member site • Multicast concerned (broadcast case is inevitable) • for Customer: Access line Bandwidth waste • for SP: Over provisioning / PE performance Source CE Not needed Joined PE CE PE PE CE CE Access L2 NW No Member VPLS PE Joined No Member 63rd IETF Paris August 2005

  4. Multicast Challenges in VPLS (2/2) • Issue B: Replication of PWs on shared physical path • Multicast and Broadcast concerned both • for Customer: (No problem) • for SP: Over provisioning / PE performance Source CE Not needed PE CE PE PE CE CE Access L2 NW VPLS PE 63rd IETF Paris August 2005

  5. Summary of Requirements • General Requirements • SHOULD solve Issue A, Issue B or both • Unknown unicast is out of scope • Treat data packets (not control packets!) • SHOULD support a way to provide customer's IP multicast • MAY consult Layer-3 information (typically snooping), but allow static or other Layer-2 control protocol approaches too • SHOULD simply flood control packets (e.g. BPDUs) • Customer Requirements • Layer-2/Layer-3 protocol • Multicast domain (reachability scope) • QoS, SLA etc. • Service Provider Requirements • Scalability • OAM (multicast-specific points) • H-VPLS etc. 63rd IETF Paris August 2005

  6. Remaining Issues • Major open questions (written inside the draft): • Requirement level of Issue A and B • SHOULD solve A, B or both (current version) / • MUST solve A, B or both (stronger better?) / • MUST A, SHOULD B / SHOULD A, MUST B (different level?) • Others • Which PE-CE protocols are consulted (PIM, IGMP etc.) … • Feedback welcome: • Is this the right approach? • Application considerations (use cases)? • Any other specific requirements? 63rd IETF Paris August 2005

  7. Next Steps • Enhance the document with more feedback • We already incorporated various contributors’ opinions, but still need more comments on the mailing list • Propose to adopt this as a WG document 63rd IETF Paris August 2005

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