Cisco NME-16ES-1G User Guide - Page 102
Configuring IGMP Snooping, Enabling or Disabling IGMP Snooping
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Configuration Tasks 16- and 36-Port Ethernet Switch Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Note The RPF-MFD flag indicates that the flow is completely hardware switched. The H flag indicates that the flow is hardware-switched on the outgoing interface. Configuring IGMP Snooping This section describes how to configure IGMP snooping on your router and consists of the following configuration information and procedures: • Enabling or Disabling IGMP Snooping, page 102 • Enabling IGMP Immediate-Leave Processing, page 103 • Statically Configuring an Interface to Join a Group, page 103 • Configuring a Multicast Router Port, page 104 Enabling or Disabling IGMP Snooping By default, IGMP snooping is globally enabled on the Ethernet switch network module. When globally enabled or disabled, it is also enabled or disabled in all existing VLAN interfaces. By default, IGMP snooping is enabled on all VLANs, but it can be enabled and disabled on a per-VLAN basis. Global IGMP snooping overrides the per-VLAN IGMP snooping capability. If global snooping is disabled, you cannot enable VLAN snooping. If global snooping is enabled, you can enable or disable snooping on a VLAN basis. Beginning in privileged EXEC mode, follow these steps to globally enable IGMP snooping on the Ethernet switch network module: Step 1 Step 2 Step 3 Step 4 Step 5 Command configure terminal ip igmp snooping end show ip igmp snooping copy running-config startup-config Purpose Enters global configuration mode. Globally enables IGMP snooping in all existing VLAN interfaces. Returns to privileged EXEC mode. Displays snooping configuration. (Optional) Saves your configuration to the startup configuration. To globally disable IGMP snooping on all VLAN interfaces, use the no ip igmp snooping global command. Beginning in privileged EXEC mode, follow these steps to enable IGMP snooping on a VLAN interface: Step 1 Step 2 Step 3 Command configure terminal ip igmp snooping vlan vlan-id end Purpose Enters global configuration mode. Enables IGMP snooping on the VLAN interface. Returns to privileged EXEC mode. 102 Cisco IOS Release 12.2(2)XT, 12.2(8)T, and 12.2(15)ZJ