Cisco WS-CBS3032-DEL Software Configuration Manual page 1158

Configuring IP Multicast Routing
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.
Beginning in privileged EXEC mode, follow these steps to configure DNS-based SSM mapping:
Command
Step 1 configure terminal
Step 2
ip igmp ssm-map enable
Step 3 ip igmp ssm-map query dns
Step 4
ip domain multicast domain-prefix
Step 5 ip name-server server-address1
[server-address2... server-address6]
Step 6 Repeat Step 5 to configure additional
DNS servers for redundancy, if required.
Step 7 end
Step 8 show running-config
Step 9 copy running-config startup-config
Configuring Static Traffic Forwarding with SSM Mapping
Use static traffic forwarding with SSM mapping to statically forward SSM traffic for certain groups.
Beginning in privileged EXEC mode, follow these steps to configure static traffic forwarding with SSM
mapping:
Command
Step 1
configure terminal
Step 2 interface type number
Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
45-22
Purpose
Enter global configuration mode.
Enable SSM mapping for groups in a configured SSM range.
(Optional) Enable DNS-based SSM mapping.
By default, the ip igmp ssm-map command enables DNS-based SSM
mapping. Only the no form of this command is saved to the running
configuration.
Note Use this command to re-enable DNS-based SSM mapping if
DNS-based SSM mapping is disabled.
(Optional) Change the domain prefix used by the switch for DNS-based
SSM mapping.
By default, the switch uses the ip-addr.arpa domain prefix.
Specify the address of one or more name servers to use for name and
address resolution.
—
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Select an interface on which to statically forward traffic for a multicast
group using SSM mapping, and enter interface configuration mode.
Static forwarding of traffic with SSM mapping works with either
Note
DNS-based SSM mapping or statically configured SSM
mapping.
Chapter 45 Configuring IP Multicast Routing
OL-13270-06