HP Cisco Catalyst Blade Switch 3020 Cisco Catalyst Blade Switch 3020 for HP So - Page 385
Configuring the IGMP Leave Timer, Configuring TCN-Related Commands
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Chapter 18 Configuring IGMP Snooping and MVR Configuring IGMP Snooping 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. Configuring TCN-Related Commands These sections describe how to control flooded multicast traffic during a TCN event: • Controlling the Multicast Flooding Time After a TCN Event, page 18-12 • Recovering from Flood Mode, page 18-12 • Disabling Multicast Flooding During a TCN Event, page 18-13 OL-8915-01 Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide 18-11
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