Network Working Group L. Yong
Internet Draft W. Hao
D. Eastlake
Category: Standard Track Huawei
A. Qu
J. Hudson
Brocade
Expires: December 2014 June 12, 2014
IS-IS Protocol Extension For Building Distribution Trees
draft-yong-isis-ext-4-distribution-tree-02
Abstract
This document proposes an IS-IS protocol extension for automatically
building bi-directional distribution trees to transport multi-
destination traffic in an IP network.
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Copyright (c) 2013 IETF Trust and the persons identified as the
document authors. All rights reserved.
Yong, et al [Page 1]Internet-Draft IS-IS Ext. For Distribution Tree June 2014
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Table of Contents
1. Introduction...................................................3
1.1. Conventions used in this document.........................4
2. IS-IS Protocol Extension.......................................5
2.1. RTADDR sub-TLV............................................5
2.2. RTADDRV6 sub-TLV..........................................6
2.3. The Group Address Sub-TLV.................................7
3. Procedures.....................................................8
3.1. Distribution Tree Computation.............................8
3.2. Parent Selection..........................................8
3.3. Parallel Local Link Selection.............................9
3.4. Tree Selection for a Group...............................10
3.5. Pruning a Distribution Tree for a Group..................10
3.6. Reverse Path Forwarding Check (RPFC).....................10
3.7. Forwarding Using a Pruned Distribution Tree..............11
3.8. Local Forwarding at Edge Router..........................11
3.9. Distribution Tree across different IGP Levels............12
4. Mobility Support..............................................14
4.1. Listener moves from one edge router to another...........14
4.2. Source host moves from one edge router to another........14
5. Backward Compatibility........................................14
6. Interworking with PIM.........................................14
7. Security Considerations.......................................14
8. IANA Considerations...........................................14
9. Acknowledgements..............................................15
10. References...................................................15
10.1. Normative References....................................15
10.2. Informative References..................................15
Yong, et al. [Page 2]Internet-Draft IS-IS Ext. For Distribution Tree June 20141. Introduction
Computer virtualization and cloud applications motivate the DC
network virtualization technology [NVO3FRWK]. This technology
decouples the end-points networking from the DC physical
infrastructure network in terms of address space and configuration
[NVO3FRWK].
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