Support for the Resource Reservation Protocol (RSVP) in Layer 3 VPNs
RFC 6016
Internet Engineering Task Force (IETF) B. Davie
Request for Comments: 6016 F. Le Faucheur
Category: Standards Track A. Narayanan
ISSN: 2070-1721 Cisco Systems, Inc.
October 2010
Support for the Resource Reservation Protocol (RSVP) in Layer 3 VPNs
Abstract
RFC 4364 and RFC 4659 define an approach to building provider-
provisioned Layer 3 VPNs (L3VPNs) for IPv4 and IPv6. It may be
desirable to use Resource Reservation Protocol (RSVP) to perform
admission control on the links between Customer Edge (CE) routers and
Provider Edge (PE) routers. This document specifies procedures by
which RSVP messages traveling from CE to CE across an L3VPN may be
appropriately handled by PE routers so that admission control can be
performed on PE-CE links. Optionally, admission control across the
provider's backbone may also be supported.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6016.
Davie, et al. Standards Track [Page 1]
RFC 6016 RSVP for L3VPNs October 2010
Copyright Notice
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than English.
Davie, et al. Standards Track [Page 2]
RFC 6016 RSVP for L3VPNs October 2010
Table of Contents
1. Introduction ....................................................4
1.1. Terminology ................................................5
1.2. Requirements Language ......................................5
2. Problem Statement ...............................................5
2.1. Model of Operation .........................................8
3. Admission Control on PE-CE Links ................................9
3.1. New Objects of Type VPN-IPv4 ...............................9
3.2. Path Message Processing at Ingress PE .....................11
3.3. Path Message Processing at Egress PE ......................12
3.4. Resv Processing at Egress PE ..............................13
3.5. Resv Processing at Ingress PE .............................13
3.6. Other RSVP Messages .......................................14
4. Admission Control in Provider's Backbone .......................14
5. Inter-AS Operation .............................................15
5.1. Inter-AS Option A .........................................15
5.2. Inter-AS Option B .........................................15
5.2.1. Admission Control on ASBR ..........................16
5.2.2. No Admission Control on ASBR .......................16
5.3. Inter-AS Option C .........................................17
6. Operation with RSVP Disabled ...................................17
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