Cisco ASR 9000 Series Software Manual page 89

Implementing Layer-3 Multicast Routing on Cisco IOS XR Software
By default, MSDP automatically sends SA messages to peers when a new member joins a group and wants
to receive multicast traffic. You are no longer required to configure an SA request to a specified MSDP peer.
SUMMARY STEPS
1. configure
2. router msdp
3. sa-filter {in | out} {ip-address | peer-name} [list access-list-name] [rp-list access-list-name]
4. cache-sa-state [list access-list-name] [rp-list access-list-name]
5. ttl-threshold ttl-value
6. exit
7. ipv4 access-list name [sequence-number] permit source [source-wildcard]
8. commit
DETAILED STEPS
Command or Action
Step 1 configure
Step 2 router msdp
Example:
RP/0/RSP0/CPU0:router(config)# router
msdp
Step 3
sa-filter {in | out} {ip-address | peer-name}
[list access-list-name] [rp-list
access-list-name]
Example:
RP/0/RSP0/CPU0:router(config-msdp)#
sa-filter out router.cisco.com list 100
Step 4 cache-sa-state [list access-list-name] [rp-list
access-list-name]
Example:
RP/0/RSP0/CPU0:router(config-msdp)#
cache-sa-state 100
Purpose
Enters MSDP protocol configuration mode.
Configures an incoming or outgoing filter list for messages received
from the specified MSDP peer.
• If you specify both the list and rp-list keywords, all conditions
must be true to pass any source, group (S, G) pairs in outgoing
Source-Active (SA) messages.
• You must configure the ipv4 access-list command in
page
• If all match criteria are true, a permit from the route map passes
routes through the filter. A deny filters routes.
• This example allows only (S, G) pairs that pass access list 100 to
be forwarded in an SA message to the peer named router.cisco.com.
Creates and caches source/group pairs from received Source-Active (SA)
messages and controls pairs through access lists.
Cisco ASR 9000 Series Aggregation Services Router Multicast Configuration Guide, Release 5.1.x
Controlling Source Information on MSDP Peer Routers
90.
Step 7, on
89