Cisco 2950G 24 Software Configuration Guide - Page 397
Configuring a Multicast Router Port
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Chapter 17 Configuring IGMP Snooping and MVR Configuring IGMP Snooping Beginning in privileged EXEC mode, follow these steps to alter the method in which a VLAN interface dynamically accesses a multicast router: Step 1 Step 2 Command configure terminal ip igmp snooping vlan vlan-id mrouter learn {cgmp | pim-dvmrp} Step 3 Step 4 Step 5 end show ip igmp snooping copy running-config startup-config Purpose Enter global configuration mode. Enable IGMP snooping on a VLAN.The VLAN ID range is 1 to 1005 when the standard software image (SI) is installed and 1 to 4094 when the enhanced software image (EI) is installed (or when running on an Catalyst 2950 LRE switch); do not enter leading zeros. Specify the multicast router learning method: • cgmp-Listen for CGMP packets. This method is useful for reducing control traffic. • pim-dvmrp-Snoop on IGMP queries and PIM-DVMRP packets. This is the default. Return to privileged EXEC mode. Verify the configuration. (Optional) Save your entries in the configuration file. This example shows how to configure IGMP snooping to use CGMP packets as the learning method: Switch# configure terminal Switch(config)# ip igmp snooping vlan 1 mrouter learn cgmp Switch(config)# end Switch# show ip igmp snooping vlan 1 vlan 1 ---------- IGMP snooping is globally enabled IGMP snooping is enabled on this Vlan IGMP snooping immediate-leave is disabled on this Vlan IGMP snooping mrouter learn mode is cgmp on this Vlan IGMP snooping is running in IGMP_ONLY mode on this Vlan To return to the default learning method, use the no ip igmp snooping vlan vlan-id mrouter learn cgmp global configuration command. Configuring a Multicast Router Port To add a multicast router port (add a static connection to a multicast router), use the ip igmp snooping vlan mrouter global configuration command on the switch. Beginning in privileged EXEC mode, follow these steps to enable a static connection to a multicast router: Step 1 Step 2 Command configure terminal ip igmp snooping vlan vlan-id mrouter interface interface-id Purpose Enter global configuration mode. Specify the multicast router VLAN ID and specify the interface to the multicast router. For the VLAN ID, the range is 1 to 1005 when the SI is installed and 1 to 4094 when the EI is installed; do not enter leading zeros. 78-14982-01 Catalyst 2950 Desktop Switch Software Configuration Guide 17-7
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