Cisco SR224T-NA Administration Guide - Page 199

Configuring Multicast Forwarding Configuring IGMP Snooping 15 When IGMP Snooping is enabled globally or on a VLAN, all IGMP packets are forwarded to the CPU. The CPU analyzes the incoming packets, and determines the following: • Which ports are asking to join which Multicast groups on what VLAN. • Which ports are connected to Multicast routers (Mrouters) that are generating IGMP queries. • Which ports are receiving PIM, DVMRP, or IGMP query protocols. These are displayed on the IGMP Snooping page. Ports, asking to join a specific Multicast group, issue an IGMP report that specifies which group(s) the host wants to join. This results in the creation of a forwarding entry in the Multicast Forwarding Data Base. To enable IGMP Snooping and identify the switch as an IGMP Snooping Querier on a VLAN: STEP 1 Click Multicast > IGMP Snooping. The IGMP Snooping page opens. STEP 2 Enable or disable the IGMP Snooping status. When IGMP Snooping is enabled globally, the device monitoring network traffic can determine which hosts have requested to receive Multicast traffic. The switch only performs IGMP Snooping if both IGMP snooping and Bridge Multicast filtering are enabled. STEP 3 Select a VLAN, and click Edit. The Edit IGMP Snooping page opens. STEP 4 Enter the parameters. • VLAN ID-Select the VLAN ID on which IGMP snooping is defined. • IGMP Snooping Status-Enable or disable the monitoring of network traffic for the selected VLAN. • Operational IGMP Snooping Status-Displays the current status of the IGMP Snooping for the selected VLAN. • MRouter Ports Auto Learn-Enable or disable auto learning of the ports to which the Mrouter is connected. • Query Robustness-Enter the Robustness Variable value to be used if this switch is the elected querier. Cisco Small Business 200 Series Smart Switch Administration Guide 200