Before You Begin
•
Enable IP multicast routing, enable PIM sparse mode, and configure SSM before performing this task.
.
•
Before you can configure and use SSM mapping with DNS lookups, you need to be able to add records
to a running DNS server. If you do not already have a DNS server running, you need to install one.
SUMMARY STEPS
1.
enable
2.
configure terminal
3.
ip igmp ssm-map enable
4.
ip igmp ssm-map query dns
5.
ip domain multicast domain-prefix
6.
ip name-server server-address1 [server-address2...server-address6]
7.
Repeat Step Step 6, on page 273 to configure additional DNS servers for redundancy, if required.
8.
end
9.
show running-config
10.
copy running-config startup-config
DETAILED STEPS
PurposeCommand or Action
Enables privileged EXEC mode.enable
Step 1
Example:
Device> enable
Enter your password if prompted.
Enters global configuration mode.configure terminal
Example:
Device# configure terminal
Step 2
Enables SSM mapping for groups in a configured SSM
range.
ip igmp ssm-map enable
Example:
Device(config)# ip igmp ssm-map enable
Step 3
(Optional) Enables DNS-based SSM mapping.ip igmp ssm-map query dns
Step 4
Example:
Device(config)# ip igmp ssm-map query dns
•
By default, the ip igmp ssm-map command enables
DNS-based SSM mapping. Only the noform of this
command is saved to the running configuration.
IP Multicast Routing Configuration Guide, Cisco IOS XE Release 3.6E (Catalyst 3850 Switches)
272 OL-32598-01
Configuring SSM
Configuring SSM Mapping
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