694
Configuring IP Multicast Routing
Configuring IP Multicast Routing
DETAILED STEPS
EXAMPLE
The following example shows how to enable static SSM mapping. In this example, the router is configured to statically
map groups that match ACL 11 to source address 172.16.8.11 and to statically map groups that match ACL 10 to source
address 172.16.8.10.
Switch(config)# ip igmp ssm-map enable
Switch(config)# ip igmp ssm-map static 11 172.16.8.11
Switch(config)# ip igmp ssm-map static 10 172.16.8.10
Switch(config)# end
Configuring DNS-Based SSM Mapping
To configure DNS-based SSM mapping, you need to create a DNS server zone or add records to an existing zone. If the
routers that are using DNS-based SSM mapping are also using DNS for other purposes, you should use a normally
configured DNS server. If DNS-based SSM mapping is the only DNS implementation being used on the router, you can
configure a false DNS setup with an empty root zone or a root zone that points back to itself.
Command Purpose
1. configure terminal Enter global configuration mode.
2. ip igmp ssm-map enable Enable SSM mapping for groups in the configured SSM range.
Note: By default, this command enables DNS-based SSM
mapping.
3. no ip igmp ssm-map query dns (Optional) Disable DNS-based SSM mapping.
Note: Disable DNS-based SSM mapping if you only want to rely
on static SSM mapping. By default, the ip igmp ssm-map
global configuration command enables DNS-based SSM
mapping.
4. ip igmp ssm-map static access-list
source-address
Configure static SSM mapping.
The ACL supplied for access-list defines the groups to be
mapped to the source IP address entered for the
source-address.
Note: You can configure additional static SSM mappings. If
additional SSM mappings are configured and the router
receives an IGMPv1 or IGMPv2 membership report for a group
in the SSM range, the switch determines the source addresses
associated with the group by using each configured ip igmp
ssm-map static command. The switch associates up to 20
sources per group.
5. Repeat Step 4 to configure
additional static SSM mappings, if
required.
—
6. end Return to privileged EXEC mode.
7. show running-config Verify your entries.
8. copy running-config
startup-config
(Optional) Save your entries in the configuration file.
To Next Page
Loading...
Need help?
General