Cisco XR12000 Series Configuration Manual page 95

Implementing Multicast Routing on Cisco IOS XR Software
Command or Action
100
Step 4
cache-sa-state [list access-list-name]
[rp-list access-list-name]
Example:
RP/0/0/CPU0:router(config-msdp)#
cache-sa-state 100
Step 5 ttl-threshold ttl-value
Example:
RP/0/0/CPU0:router(config-msdp)#
ttl-threshold 8
Step 6
exit
Example:
RP/0/0/CPU0:router(config-msdp)# exit
Step 7 ipv4 access-list name [sequence-number]
permit source [source-wildcard]
Example:
RP/0/0/CPU0:router(config)# ipv4
access-list 100 20 permit 239.1.1.1
0.0.0.0
Step 8 Use the commit or end command.
OL-30405-02
Purpose
• 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.
(Optional) Limits which multicast data is sent in SA messages to an MSDP
peer.
• Only multicast packets with an IP header TTL greater than or equal
to the ttl-value argument are sent to the MSDP peer specified by the
IP address or name.
• Use this command if you want to use TTL to examine your multicast
data traffic. For example, you could limit internal traffic to a TTL of
8. If you want other groups to go to external locations, send those
packets with a TTL greater than 8.
• This example configures a TTL threshold of eight hops.
Exits the current configuration mode.
Defines an IPv4 access list to be used by SA filtering.
• In this example, the access list 100 permits multicast group 239.1.1.1.
• The ipv4 access-list command is required if the keyword list is
configured for SA filtering in
commit—Saves the configuration changes, and remains within the
configuration session.
end—Prompts user to take one of these actions:
• Yes— Saves configuration changes and exits the configuration session.
• No—Exits the configuration session without committing the
configuration changes.
Cisco IOS XR Multicast Configuration Guide for the Cisco XR12000 Series Router, Release 5.1.x
Controlling Source Information on MSDP Peer Routers
Step 3, on page 84.
85