OSPF-Based Layer 1 VPN Auto-Discovery
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From: The IESG <firstname.lastname@example.org> To: IETF-Announce <email@example.com> Cc: Internet Architecture Board <firstname.lastname@example.org>, RFC Editor <email@example.com>, l1vpn mailing list <firstname.lastname@example.org>, l1vpn chair <email@example.com> Subject: Protocol Action: 'OSPF Based Layer 1 VPN Auto-Discovery' to Proposed Standard The IESG has approved the following document: - 'OSPF Based Layer 1 VPN Auto-Discovery ' <draft-ietf-l1vpn-ospf-auto-discovery-07.txt> as a Proposed Standard This document is the product of the Layer 1 Virtual Private Networks Working Group. The IESG contact persons are David Ward and Ross Callon. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-l1vpn-ospf-auto-discovery-07.txt
Technical Summary This document defines an Open Shortest Path First (OSPF) based Layer-1 Virtual Private Network (L1VPN) auto-discovery mechanism. This mechanism enables provider edge (PE) devices using OSPF to dynamically learn about existence of each other, and attributes of configured customer edge (CE) links and their associations with L1VPNs. This document builds on L1VPN framework and requirements, and provides a L1VPN basic mode auto-discovery mechanism. Working Group Summary See the discussion above wrt the BGP/OSPF choice. Document Quality OSPF-TE is widely implemented and deployed for optical networks. This document makes a very simple extension to that work and so is simple to add to existing implementations. Although L1VPNs are not currently deployed, various experiments and interop demos have been conducted. Most of these have focused on signaling with manual configuration rather than autodiscovery, but at least one implementation with OSPF autodiscovery is known of, and this has been used to show a proof-of-concept. Note that there is nothing to prevent the development of an identical set of extensions to ISIS-TE. This has been put to the WG as an option on several occasions, but there have been no volunteers to write an I-D and no indication of any intent to implement. This should not be a surprise as, although there are many implementations of ISIS-TE and a very few of GMPLS ISIS, there are no known GMPLS ISIS implementations for optical equipment. Nothing precludes a future development of suitable ISIS extensions being developed in the future either in the L1VPN WG or the ISIS WG.