Configuring The Aging Time; Configuring The Igmp Snooping Querier - Cisco Catalyst 2950 Software Configuration Manual

Configuring IGMP Snooping

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
To disable the aging of the forwarding table entries, enter the ip igmp snooping source-only-learning
age-timer 0 global configuration command.
If you disable source-only learning by using the no ip igmp snooping source-only learning global
configuration command and the aging time is enabled, it has no effect on the switch.

Configuring the IGMP Snooping Querier

To enable the IGMP snooping querier feature in a VLAN, follow these steps:
Command
Step 1 configure terminal
Step 2
ip igmp snooping querier
Step 3
ip igmp snooping querier ip_address
Step 4
ip igmp snooping querier query-interval
interval-count
Step 5
ip igmp snooping querier tcn query
[count count | interval interval]
Step 6 ip igmp snooping querier timer expiry
timeout
Step 7 ip igmp snooping querier version version (Optional) Select the IGMP version number that the querier feature
Step 8 end
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
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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.
Purpose
Enter global configuration mode.
Enable the IGMP snooping querier.
(Optional) Specify an IP address for the IGMP snooping querier. If you
do not specify an IP address, the querier tries to use the global IP
address configured for the IGMP querier.
Note The IGMP snooping querier does not generate an IGMP
general query if it cannot find an IP address on the switch.
(Optional) Set the interval between IGMP queriers. The interval range
is from 1 to 18000 seconds.
(Optional) Set the time (in seconds) between Topology Change
Notification (TCN) queries. The count range is from 1 to 10. The
interval range is from 1 to 255 seconds.
(Optional) Set the length of time (in seconds) until the IGMP querier
expires.The range is from 60 to 300 seconds.
uses. Select 1 or 2.
Return to privileged EXEC mode.
Chapter 20 Configuring IGMP Snooping and MVR
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