Cisco WS-C2960S-48LPD-L Software Guide - Page 377
Configuring the IGMP Leave Timer
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Chapter 18 Configuring IGMP Snooping and MVR Configuring IGMP Snooping Step 4 Step 5 Command show ip igmp snooping vlan vlan-id copy running-config startup-config Purpose Verify that Immediate Leave is enabled on the VLAN interface. (Optional) Save your entries in the configuration file. To disable IGMP Immediate Leave on a VLAN, use the no ip igmp snooping vlan vlan-id immediate-leave global configuration command. This example shows how to enable IGMP Immediate Leave on VLAN 130: Switch# configure terminal Switch(config)# ip igmp snooping vlan 130 immediate-leave Switch(config)# end Configuring the IGMP Leave Timer Follows these guidelines when configuring the IGMP leave timer: • You can configure the leave time globally or on a per-VLAN basis. • Configuring the leave time on a VLAN overrides the global setting. • The default leave time is 1000 milliseconds. • The IGMP configurable leave time is only supported on hosts running IGMP Version 2. • The actual leave latency in the network is usually the configured leave time. However, the leave time might vary around the configured time, depending on real-time CPU load conditions, network delays and the amount of traffic sent through the interface. Beginning in privileged EXEC mode, follow these steps to enable the IGMP configurable-leave timer: Step 1 Step 2 Step 3 Command configure terminal ip igmp snooping last-member-query-interval time ip igmp snooping vlan vlan-id last-member-query-interval time Step 4 Step 5 Step 6 end show ip igmp snooping copy running-config startup-config Purpose Enter global configuration mode. Configure the IGMP leave timer globally. The range is 100 to 5000 milliseconds. The default is 1000 seconds. (Optional) Configure the IGMP leave time on the VLAN interface. The range is 100 to 5000 milliseconds. Note Configuring the leave time on a VLAN overrides the globally configured timer. Return to privileged EXEC mode. (Optional) Display the configured IGMP leave time. (Optional) Save your entries in the configuration file. To globally reset the IGMP leave timer to the default setting, use the no ip igmp snooping last-member-query-interval global configuration command. To remove the configured IGMP leave-time setting from the specified VLAN, use the no ip igmp snooping vlan vlan-id last-member-query-interval global configuration command. OL-8603-04 Catalyst 2960 Switch Software Configuration Guide 18-11
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