< draft-ietf-rtgwg-rlfa-node-protection-01.txt		draft-ietf-rtgwg-rlfa-node-protection-02.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: June 18, 2015 C. Bowers		Expires: December 17, 2015 C. Bowers
	Juniper Networks, Inc.		Juniper Networks, Inc.
	S. Litkowski		S. Litkowski
	Orange		Orange
	H. Raghuveer		H. Raghuveer
			June 15, 2015
	December 15, 2014
	Remote-LFA Node Protection and Manageability		Remote-LFA Node Protection and Manageability
	draft-ietf-rtgwg-rlfa-node-protection-01		draft-ietf-rtgwg-rlfa-node-protection-02
	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 7 ¶
	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 June 18, 2015.		This Internet-Draft will expire on December 17, 2015.
	Copyright Notice		Copyright Notice
	Copyright (c) 2014 IETF Trust and the persons identified as the		Copyright (c) 2015 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
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	to this document. Code Components extracted from this document must		to this document. Code Components extracted from this document must
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	the Trust Legal Provisions and are provided without warranty as		the Trust Legal Provisions and are provided without warranty as
	described in the Simplified BSD License.		described in the Simplified BSD License.
	Table of Contents		Table of Contents
	1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3		1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
	2. Node Protection with Remote-LFA . . . . . . . . . . . . . . . 3		2. Node Protection with Remote-LFA . . . . . . . . . . . . . . . 3
	2.1. The Problem . . . . . . . . . . . . . . . . . . . . . . . 4		2.1. The Problem . . . . . . . . . . . . . . . . . . . . . . . 4
	2.2. Few Additional Definitions . . . . . . . . . . . . . . . 5		2.2. Few Additional Definitions . . . . . . . . . . . . . . . 5
	2.2.1. Link-Protecting Extended P-Space . . . . . . . . . . 6		2.2.1. Link-Protecting Extended P-Space . . . . . . . . . . 5
	2.2.2. Node-Protecting Extended P-Space . . . . . . . . . . 6		2.2.2. Node-Protecting Extended P-Space . . . . . . . . . . 6
	2.2.3. Q-Space . . . . . . . . . . . . . . . . . . . . . . . 7		2.2.3. Q-Space . . . . . . . . . . . . . . . . . . . . . . . 7
	2.2.4. Link-Protecting PQ Space . . . . . . . . . . . . . . 8		2.2.4. Link-Protecting PQ Space . . . . . . . . . . . . . . 8
	2.2.5. Candidate Node-Protecting PQ Space . . . . . . . . . 8		2.2.5. Candidate Node-Protecting PQ Space . . . . . . . . . 8
	2.3. Computing Node-protecting R-LFA Path . . . . . . . . . . 8		2.3. Computing Node-protecting R-LFA Path . . . . . . . . . . 8
	2.3.1. Computing Candidate Node-protecting PQ-Nodes for		2.3.1. Computing Candidate Node-protecting PQ-Nodes for
	Primary nexthops . . . . . . . . . . . . . . . . . . 8		Primary nexthops . . . . . . . . . . . . . . . . . . 8
	2.3.2. Computing node-protecting paths from PQ-nodes to		2.3.2. Computing node-protecting paths from PQ-nodes to
	destinations . . . . . . . . . . . . . . . . . . . . 10		destinations . . . . . . . . . . . . . . . . . . . . 10
	2.3.3. Limiting extra computational overhead . . . . . . . . 12		2.3.3. Limiting extra computational overhead . . . . . . . . 12
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