draft-ietf-rtgwg-rlfa-node-protection-00.txt   draft-ietf-rtgwg-rlfa-node-protection-01.txt 
Routing Area Working Group P. Sarkar, Ed. Routing Area Working Group P. Sarkar, Ed.
Internet-Draft H. Gredler Internet-Draft H. Gredler
Intended status: Standards Track S. Hegde Intended status: Standards Track S. Hegde
Expires: December 27, 2014 C. Bowers Expires: June 18, 2015 C. Bowers
Juniper Networks, Inc. Juniper Networks, Inc.
S. Litkowski S. Litkowski
Orange Orange
H. Raghuveer H. Raghuveer
June 25, 2014 December 15, 2014
Remote-LFA Node Protection and Manageability Remote-LFA Node Protection and Manageability
draft-ietf-rtgwg-rlfa-node-protection-00 draft-ietf-rtgwg-rlfa-node-protection-01
Abstract Abstract
The loop-free alternates computed following the current Remote-LFA The loop-free alternates computed following the current Remote-LFA
[I-D.ietf-rtgwg-remote-lfa] specification gaurantees only link- [I-D.ietf-rtgwg-remote-lfa] specification gaurantees only link-
protection. The resulting Remote-LFA nexthops (also called PQ- protection. The resulting Remote-LFA nexthops (also called PQ-
nodes), may not gaurantee node-protection for all destinations being nodes), may not gaurantee node-protection for all destinations being
protected by it. protected by it.
This document describes procedures for determining if a given PQ-node This document describes procedures for determining if a given PQ-node
skipping to change at page 2, line 10 skipping to change at page 2, line 10
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/. Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on December 27, 2014. This Internet-Draft will expire on June 18, 2015.
Copyright Notice Copyright Notice
Copyright (c) 2014 IETF Trust and the persons identified as the Copyright (c) 2014 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
skipping to change at page 4, line 5 skipping to change at page 4, line 5
Node-protection is required to provide protection of traffic on a Node-protection is required to provide protection of traffic on a
given forwarding node, against the failure of the first-hop node on given forwarding node, against the failure of the first-hop node on
the primary forwarding path. Such protection becomes more critical the primary forwarding path. Such protection becomes more critical
in the absence of mechanisms like non-stop-routing in the network. in the absence of mechanisms like non-stop-routing in the network.
Certain operators refrains from deploying non-stop-routing in their Certain operators refrains from deploying non-stop-routing in their
network, due to the significant additional performance complexities network, due to the significant additional performance complexities
it comes along with. In such cases node-protection is a must to it comes along with. In such cases node-protection is a must to
gaurantee un-interrupted flow of traffic, even in the case of an gaurantee un-interrupted flow of traffic, even in the case of an
entire forwarding node going down. entire forwarding node going down.
The follwoing sections discusses the node-protection problem in the The following sections discusses the node-protection problem in the
context of Remote-LFA and proposes a solution for solving the same. context of Remote-LFA and proposes a solution for solving the same.
2.1. The Problem 2.1. The Problem
To better illustrate the problem and the solution proposed in this To better illustrate the problem and the solution proposed in this
document the following topology diagram from the Remote-LFA document the following topology diagram from the Remote-LFA
[I-D.ietf-rtgwg-remote-lfa] draft is being re-used with slight [I-D.ietf-rtgwg-remote-lfa] draft is being re-used with slight
modification. modification.
D1 D1
 End of changes. 5 change blocks. 
5 lines changed or deleted 5 lines changed or added

This html diff was produced by rfcdiff 1.41. The latest version is available from http://tools.ietf.org/tools/rfcdiff/