Browse Prior Art Database

Graceful Restart Mechanism for Label Distribution Protocol (RFC3478)

IP.com Disclosure Number: IPCOM000011406D
Original Publication Date: 2003-Feb-01
Included in the Prior Art Database: 2003-Feb-19
Document File: 13 page(s) / 29K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Leelanivas: AUTHOR [+3]

Abstract

This document describes a mechanism that helps to minimize the negative effects on MPLS traffic caused by Label Switching Router's (LSR's) control plane restart, specifically by the restart of its Label Distribution Protocol (LDP) component, on LSRs that are capable of preserving the MPLS forwarding component across the restart.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 10% of the total text.

Network Working Group� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � M. Leelanivas

Request for Comments: 3478� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Y. Rekhter

Category: Standards Track� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Juniper Networks

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � R. Aggarwal

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Redback Networks

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � February 2003

� � � � � � Graceful Restart Mechanism for Label Distribution Protocol

Status of this Memo

� � This document specifies an Internet standards track protocol for the

� � Internet community, and requests discussion and suggestions for

� � improvements.� Please refer to the current edition of the "Internet

� � Official Protocol Standards" (STD 1) for the standardization state

� � and status of this protocol.� Distribution of this memo is unlimited.

Copyright Notice

� � Copyright (C) The Internet Society (2003).� All Rights Reserved.

Abstract

� � This document describes a mechanism that helps to minimize the

� � negative effects on MPLS traffic caused by Label Switching Router's

� � (LSR's) control plane restart, specifically by the restart of its

� � Label Distribution Protocol (LDP) component, on LSRs that are capable

� � of preserving the MPLS forwarding component across the restart.

� � The mechanism described in this document is applicable to all LSRs,

� � both those with the ability to preserve forwarding state during LDP

� � restart and those without (although the latter needs to implement

� � only a subset of the mechanism described in this document).

� � Supporting (a subset of) the mechanism described here by the LSRs

� � that can not preserve their MPLS forwarding state across the restart

� � would not reduce the negative impact on MPLS traffic caused by their

� � control plane restart, but it would minimize the impact if their

� � neighbor(s) are capable of preserving the forwarding state across the

� � restart of their control plane and implement the mechanism described

� � here.

� � The mechanism makes minimalistic assumptions on what has to be

� � preserved across restart - the mechanism assumes that only the actual

� � MPLS forwarding state has to be preserved; the mechanism does not

� � require any of the LDP-related states to be preserved across the

� � restart.

Leelanivas, et al.� � � � � � � � � Standards Track� � � � � � � � � � � � � � � � � � � � [Page 1]

RFC 3478� � � � � � � � � � Graceful Restart Mechanism for LDP� � � � � February 2003

� � The procedures described in this document apply to downstream

� � unsolicited label distribution.� Extending these procedures to

� � downstream on demand label distribution is for further stu...