Configuring The Aging Time - Cisco 2950 - Catalyst Switch Configuration Manual

Configuring IGMP Snooping
Note We strongly recommend that you do not disable IP multicast-source-only learning. IP
multicast-source-only learning should be disabled only if your network is not composed of IP
multicast-source-only networks and if disabling this learning method improves the network
performance.
Beginning in privileged EXEC mode, follow these steps to disable IP multicast-source-only learning:
Command
Step 1 configure terminal
Step 2
no ip igmp snooping source-only-learning
Step 3
no ip igmp snooping mrouter learn pim v2
Step 4
end
Step 5 show running-config | include
source-only-learning
Step 6 copy running-config startup-config
To enable IP multicast-source-only learning, use the ip igmp snooping source-only-learning global
configuration command. To enable PIM v2 multicast router discovery, use the p igmp snooping
mrouter learn pim v2 global configuration command.
This example shows how to disable IP multicast-source-only learning and PIM v2 multicast router
discovery:
Switch# configure terminal
Switch(config)# no ip igmp snooping source-only-learning
Switch(config)# no ip igmp snooping mrouter learn pim v2
Switch(config)# end

Configuring the Aging Time

You can set the aging time for forwarding-table entries that the switch learns by using the IP
multicast-source-only learning method.
Beginning in privileged EXEC mode, follow these steps to configure the aging time:
Command
Step 1
configure terminal
Step 2 ip igmp snooping source-only learning age-timer
time
Step 3 end
Step 4 show running-config | include
source-only-learning
Step 5
copy running-config startup-config
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
21-12
Chapter 21
Purpose
Enter global configuration mode
Disable IP multicast-source-only learning.
(Optional) Disable multicast router discovery by PIM v2
packets.
Return to privileged EXEC mode.
Verify that IP multicast-source-only learning is disabled.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode
Set the aging time. The range is from 0 to 2880 seconds. The
default is 600 seconds (10 minutes).
Return to privileged EXEC mode.
Verify the aging time.
(Optional) Save your entries in the configuration file.
Configuring IGMP Snooping and MVR
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