Internet Engineering Task Force (IETF) P. Dutta
Request for Comments: 7361 F. Balus
Category: Standards Track Alcatel-Lucent
ISSN: 2070-1721 O. Stokes
Extreme Networks
G. Calvignac
Orange
D. Fedyk
Hewlett-Packard
September 2014
LDP Extensions for Optimized MAC Address Withdrawal
in a Hierarchical Virtual Private LAN Service (H-VPLS)
Abstract
RFC 4762 describes a mechanism to remove or unlearn Media Access
Control (MAC) addresses that have been dynamically learned in a
Virtual Private LAN Service (VPLS) instance for faster convergence on
topology changes. The procedure also removes MAC addresses in the
VPLS that do not require relearning due to such topology changes.
This document defines an enhancement to the MAC address withdraw
procedure with an empty MAC list (RFC 4762); this enhancement enables
a Provider Edge (PE) device to remove only the MAC addresses that
need to be relearned. Additional extensions to RFC 4762 MAC withdraw
procedures are specified to provide an optimized MAC flushing for the
Provider Backbone Bridging (PBB) VPLS specified in RFC 7041.
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/rfc7361.
Dutta, et al. Standards Track [Page 1]RFC 7361 Optimized MAC Withdrawal in H-VPLS September 2014Copyright Notice
Copyright (c) 2014 IETF Trust and the persons identified as the
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Dutta, et al. Standards Track [Page 2]RFC 7361 Optimized MAC Withdrawal in H-VPLS September 2014Table of Contents
1. Introduction ....................................................4
2. Terminology .....................................................6
2.1. Requirements Language ......................................6
3. Overview ........................................................6
3.1. MAC Flushing on Activation of Backup Spoke PW ..............8
3.1.1. MAC Flushing Initiated by PE-rs .....................8
3.1.2. MAC Flushing Initiated by MTU-s .....................8
3.2. MAC Flushing on Failure ....................................9
3.3. MAC Flushing in PBB-VPLS ..................................10
4. Problem Description ............................................10
4.1. MAC Flushing Optimization in VPLS Resiliency ..............10
4.1.1. MAC Flushing Optimization for Regular H-VPLS .......11
4.1.2. MAC Flushing Optimization for Native Ethernet
Access .............................................13
4.2. Black-Holing Issue in PBB-VPLS ............................13
5. Solution Description ...........................................14
5.1. MAC Flushing Optimization for VPLS Resiliency .............14
5.1.1. MAC Flush Parameters TLV ...........................15
5.1.2. Application of the MAC Flush TLV in
Optimized MAC Flushing .............................16
5.1.3. MAC Flush TLV Processing Rules for Regular VPLS ....17
5.1.4. Optimized MAC Flush Procedures .....................18
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