"Authentication and Confidentiality in PIM-SM Link-local Messages", William Atwood, Salekul Islam, Maziar Siami, 14-Apr-09. ( bytes)

RFC 4601 mandates the use of IPsec to ensure authentication of the link-local messages in the Protocol Independent Multicast - Sparse Mode (PIM-SM) routing protocol. This document specifies mechanisms to authenticate the PIM-SM link-local messages using the IP security (IPsec) Encapsulating Security Payload (ESP) or (optionally) the Authentication Header (AH). It specifies optional mechanisms to provide confidentiality using the ESP. Manual keying is specified as the mandatory and default group key management solution. To deal with issues of scalability and security that exist with manual keying, an optional support for automated group key management mechanism is provided. However, the procedures for implementing automated group key management are left to other documents. This document updates RFC 4601.

"Population Count Extensions to PIM", Dino Farinacci, Greg Shepherd, Yiqun Cai, 1-Jul-09. ( bytes)

This specification defines a method for providing multicast distribution-tree accounting data. Simple extensions to the PIM protocol allow a rough approximation of tree-based data in a scalable fashion.

"PIM Group-to-RP Mapping", Bharat Joshi, Andy Kessler, David McWalter, 25-Jun-09. ( bytes)

Each PIM-SM router in a PIM Domain which supports ASM maintains Group-to-RP mappings which are used to identify a RP for a specific multicast group. PIM-SM has defined an algorithm to choose a RP from the Group-to-RP mappings learned using various mechanisms. This algorithm does not allow administrator to override a specific Group- to-RP mapping with the static Group-to-RP mapping which an administrator would want to use. This algorithm also does not consider the PIM mode and the mechanism through which a Group-to-RP mapping was learned. The intention of this document is to suggest a standard algorithm to deterministically choose between several group-to-rp mappings for a specific group. This document first explains the requirements to extend the Group-to-RP mapping algorithm and then proposes the new algorithm.

"PIM Multi-Topology ID (MT-ID) Join-Attribute", Yiqun Cai, Heidi Ou, 2-Jul-09. ( bytes)

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.

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