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Layer 2 Control Protocol for Broadband Networks

This BoF session at IETF 65 in Dallas, TX discusses the proposed Layer 2 Control Protocol (L2CP) solution for access and aggregation network technologies. Key points include problem description, protocol overview, proposed work items, and discussion on the work's scope and interest.

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Layer 2 Control Protocol for Broadband Networks

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  1. Layer 2 Control Protocol BoF (L2CP) IETF 65, Dallas, TX Wojciech Dec (wdec@cisco.com) Matthew Bocci (matthew.bocci@alcatel.co.uk)

  2. Administrivia • Blue Sheets • Note takers + Jabber Scribe • Mailing List: General Discussion: l2cp@ietf.org To Subscribe: l2cp-request@ietf.org In Body: subscribe your_email_address Archive: http://www.ietf.org/mail-archive/web/l2cp/index.html

  3. Agenda • Introduction/agenda tweaking (Chairs) • Problem description (Thomas Haag) • Overview of proposed protocol solution (Sanjay Wadwha) • Proposed Work Items & Charter (Chairs) • Discussion and focus • Is there interest on working on this? • Is the proposed charter a reasonable start?

  4. Introduction and Scope • L2CP is about: • Common, IP-based protocol that operates across a number of access and aggregation network technologies • Operates between access node (e.g. DSLAM) and aggregation device (BRAS/BNG) • Enable specific tasks that are not automated today: • access line topology discovery, triggering remote local loop OAM tests, dynamic local loop line configuration, communicate multicast state between access node and BNG • L2CP will NOT: • Address or replace control plane of the underlying aggregation network e.g. ATM VCs, Ethernet VLANs etc

  5. Related Documents Proposed Charter:http://www3.ietf.org/proceedings/06mar/slides/l2cp-0.txt GSMP extensions for layer2 controlhttp://www.ietf.org/internet-drafts/draft-wadhwa-gsmp-l2control-configuration-00.txt Framework and Requirements for a Layer 2 Control Protocol (L2CP) in Broadband Multi-Service Networkshttp://www.ietf.org/internet-drafts/draft-ooghe-l2cp-framework-00.txt GSMP Background: General Switch Management Protocol v3 - RFC3292http://www.ietf.org/rfc/rfc3292.txt?number=3292 Draft GSMPv3 Base Specificationhttp://www.ietf.org/internet-drafts/draft-ietf-gsmp-v3-base-spec-07.txt DSL Forum Liaison: Layer 2 Control Protocol use-cases (DSL Forum work in progress) PD21 - Liaised to the IETF by the DSL Forum on December 8th, 2005. dsl2005.052.doc.

  6. Problem Statement • Thomas

  7. Proposed Protocol • Sanjay

  8. Issues • Applicability of GSMP and evolution (media specific encapsulations, IPSec, Partitioning, etc) • Scalability of transport protocol and messaging for large scale deployments • High Availability/Graceful Restart/Stateful switchover (redundant controllers)/non disruptive state refresh • Database scalability and handling stale entries • Protocol Security/peer authentication • Applicability to other broadband access technologies

  9. Proposed Work Items • Framework / Requirements • Describe use cases • Identify specific protocol requirements • Protocol Spec • Define extensions to existing protocol • Proposal to extend a subset of GSMPv3 • Extensions to address issues • MIBS

  10. Interactions with other IETF WGs and standards bodies • DSL Forum • Use cases and requirements • WT-147 "Layer 2 Control Mechanism for Broadband Multi-Service Architectures"

  11. Discussion • Is there interest in this work? • Comments on the charter • Is the proposed charter a reasonable start? • What should the WG name be?

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