BGP-Based Auto-Discovery for Layer-1 VPNs
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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: 'BGP-based Auto-Discovery for Layer-1 VPNs' to Proposed Standard The IESG has approved the following document: - 'BGP-based Auto-Discovery for Layer-1 VPNs ' <draft-ietf-l1vpn-bgp-auto-discovery-06.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-bgp-auto-discovery-06.txt
Technical Summary The purpose of this document is to define a BGP-based auto-discovery mechanism for Layer-1 VPNs (L1VPNs). The auto-discovery mechanism for L1VPNs allows the provider network devices to dynamically discover the set of PEs having ports attached to CE members of the same VPN. That information is necessary for completing the signaling phase of L1VPN connections. One main objective of a L1VPN auto-discovery mechanism is to support the "single-end provisioning" model, where addition of a new port to a given L1VPN would involve configuration changes only on the PE that has this port and on the CE that is connected to the PE via this port. Working Group Summary See the discussion above wrt the OSPF/BGP choice. Document Quality BGP is widely implemented and deployed for packet networks and for L3VPNs. 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 an implementation with an early version of BGP autodiscovery is known of, and this has been used to show a proof-of-concept.