Cisco Cisco IOS Software Release 12.2(33)SXH

© 2007 Cisco Systems, Inc. All rights reserved.

The MSDP Compliance with IETF RFC 3618 feature enables you to configure Multicast Source 
Discovery Protocol (MSDP) to comply with the peer-RPF forwarding rules defined in the Internet 
Engineering Task Force (IETF) RFC 3618 specifications. Enabling the MSDP Compliance with IETF 
RFC 3618 feature prevents Source-Active (SA) message loops. Additionally, enabling the MSDP 
Compliance with IETF RFC 3618 feature eliminates the requirement that Border Gateway Protocol 
(BGP) route reflectors (RRs) run MSDP, enables the use of an Interior Gateway Protocol (IGP) for the 
Reverse Path Forwarding (RPF) check, and allows MSDP peerings between routers in nondirectly 
connected autonomous systems.

Configuration information is included in the “Using MSDP to Interconnect Multiple PIM-SM Domains” 
module at the following URL:

The following sections provide information about this feature:

Configuring MSDP Compliance with IETF RFC 3618

MSDP Compliance with IETF RFC 3618: Example

For a complete list of features included in the “Using MSDP to Interconnect Multiple PIM-SM 
Domains” module, see the Feature Information table located toward the end of the module.

The following commands are new or modified for this feature: