Explicit Reverse Path Forwarding (RPF) Vector (RFC7891)
Original Publication Date: 2016-Jun-01
Included in the Prior Art Database: 2016-Jun-29
Internet Society Requests For Comment (RFCs)
J. Asghar: AUTHOR [+6]
The procedures in [RFC5496] define how an RPF Vector can be used to influence the path selection in the absence of a route to the source. The same procedures can be used to override a route to the source when it exists. It is possible to include multiple RPF Vectors in the list where each router along the path will perform a unicast route lookup on the first Vector in the attribute list. Once the router owning the address of the RPF Vector is reached, following the procedures in [RFC5496], the RPF Vector will be removed from the attribute list. This will result in a 'loosely' routed path that still depends on unicast reachability to the RPF Vector(s).
Internet Engineering Task Force (IETF) J. Asghar Request for Comments: 7891 IJ. Wijnands, Ed. Category: Standards Track S. Krishnaswamy ISSN: 2070-1721 A. Karan Cisco Systems V. Arya DIRECTV Inc. June 2016
Explicit Reverse Path Forwarding (RPF) Vector
The PIM Reverse Path Forwarding (RPF) Vector TLV defined in RFC 5496 can be included in a PIM Join Attribute such that the RPF neighbor is selected based on the unicast reachability of the RPF Vector instead of the source or Rendezvous Point associated with the multicast tree.
This document defines a new RPF Vector Attribute type such that an explicit RPF neighbor list can be encoded in the PIM Join Attribute, thus bypassing the unicast route lookup.
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 7841.
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/rfc7891.
al. Standards Track [Page 1]
RFC 7891 Explicit Reverse Path Forwarding (RPF) Vector June 2016
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