PurposeCommand or Action
commit
Step 12
Displays the MSDP global variables.show msdp [ipv4] globals
Example:
RP/0/RP0/CPU0:router# show msdp globals
Step 13
Displays information about the MSDP peer.
show msdp [ipv4] peer [peer-address]
Example:
RP/0/RP0/CPU0:router# show msdp peer
Step 14
172.31.1.2
Displays the RPF lookup.
show msdp [ipv4] rpf rpf-address
Example:
RP/0/RP0/CPU0:router# show msdp rpf
Step 15
172.16.10.13
Controlling Source Information on MSDP Peer Routers
Your MSDP peer router can be customized to control source information that is originated, forwarded, received,
cached, and encapsulated.
When originating Source-Active (SA) messages, you can control to whom you will originate source information,
based on the source that is requesting information.
When forwarding SA messages you can do the following:
•
Filter all source/group pairs
•
Specify an extended access list to pass only certain source/group pairs
•
Filter based on match criteria in a route map
When receiving SA messages you can do the following:
•
Filter all incoming SA messages from an MSDP peer
•
Specify an extended access list to pass certain source/group pairs
•
Filter based on match criteria in a route map
In addition, you can use time to live (TTL) to control what data is encapsulated in the first SA message for
every source. For example, you could limit internal traffic to a TTL of eight hops. If you want other groups
to go to external locations, you send those packets with a TTL greater than eight hops.
Cisco IOS XR Multicast Configuration Guide for the Cisco CRS Router, Release 5.2.x
124
Implementing Multicast Routing on Cisco IOS XR Software
Controlling Source Information on MSDP Peer Routers
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