PIM Multi-Topology ID (MT-ID) Join Attribute
RFC 6420
| Document | Type |
RFC - Proposed Standard
(November 2011; No errata)
Was draft-ietf-pim-mtid (pim WG)
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Replaces | draft-cai-pim-mtid | ||
| Stream | IETF | ||
| Formats | plain text html pdf htmlized bibtex | ||
| Stream | WG state | WG Document | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 6420 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | Adrian Farrel | ||
| IESG note | Mike McBride (mmcbride@cisco.com) is the document shepherd. | ||
| Send notices to | (None) | ||
Internet Engineering Task Force (IETF) Y. Cai
Request for Comments: 6420 H. Ou
Category: Standards Track Cisco Systems, Inc.
ISSN: 2070-1721 November 2011
PIM Multi-Topology ID (MT-ID) Join Attribute
Abstract
This document introduces a new type of PIM Join Attribute that
extends PIM signaling to identify a topology that should be used when
constructing a particular multicast distribution tree.
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/rfc6420.
Copyright Notice
Copyright (c) 2011 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Cai & Ou Standards Track [Page 1]
RFC 6420 PIM MT-ID Join Attribute November 2011
Table of Contents
1. Introduction ....................................................2
2. Terminology .....................................................3
3. Functional Overview .............................................4
3.1. PIM RPF Topology ...........................................4
3.2. PIM MT-ID ..................................................6
3.3. Applicability ..............................................7
4. Protocol Specification of PIM MT-ID .............................7
4.1. PIM MT-ID Hello Option .....................................7
4.2. PIM MT-ID Join Attribute ...................................7
4.2.1. Sending PIM MT-ID Join Attribute ....................7
4.2.2. Receiving PIM MT-ID Join Attribute ..................8
4.2.3. Validating PIM MT-ID Join Attribute .................8
4.2.4. Conflict Resolution .................................9
4.2.4.1. Conflict Resolution Rules for
Upstream Routers ..........................10
4.2.4.2. Conflict Resolution Rules for
Downstream Routers ........................10
5. Packet Format ..................................................10
5.1. PIM MT-ID Hello Option ....................................11
5.2. PIM MT-ID Join Attribute TLV Format .......................11
6. IANA Considerations ............................................11
6.1. PIM MT-ID Hello Option ....................................11
6.2. PIM MT-ID Join Attribute Type .............................12
7. Security Considerations ........................................12
8. Acknowledgments ................................................12
9. References .....................................................12
9.1. Normative References ......................................12
9.2. Informative References ....................................13
1. Introduction
Some unicast protocols, such as OSPF and IS-IS, allow a single
network to be viewed as multiple topologies [RFC4915] [RFC5120].
Deploying multi-topology (MT) routing allows different paths through
the network to be selected to support different traffic or to offer
protection paths in the event of failures.
PIM [RFC4601] employs a technique known as Reverse Path Forwarding
(RPF) to construct forwarding trees between multicast sources and
receivers. The procedure of RPF uses topology information provided
by routing protocols, such as OSPF and IS-IS. Using the PIM MT-ID
Join Attribute specified in this document enables PIM to access the
multiple topologies created by the routing protocols and construct
multicast forwarding trees using separate network paths even when the
roots of the trees are the same.
Cai & Ou Standards Track [Page 2]
RFC 6420 PIM MT-ID Join Attribute November 2011
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