Dell PowerSwitch S4112F-ON EMC SmartFabric OS10 User Guide Release 10.5.0 - Page 754
IGMP snooping
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Group Address Interface 225.1.1.1 vlan121 225.1.1.2 vlan121 225.1.1.3 vlan121 225.1.1.4 vlan121 225.1.1.5 vlan121 225.1.1.6 vlan121 225.1.1.7 vlan121 225.1.1.8 vlan121 225.1.1.9 vlan121 225.1.1.10 vlan121 225.1.1.11 vlan121 225.1.1.12 vlan121 225.1.1.13 vlan121 225.1.1.14 vlan121 225.1.1.15 vlan121 225.1.1.16 vlan121 Mode IGMPv2-Compat IGMPv2-Compat IGMPv2-Compat IGMPv2-Compat IGMPv2-Compat IGMPv2-Compat IGMPv2-Compat IGMPv2-Compat IGMPv2-Compat IGMPv2-Compat IGMPv2-Compat IGMPv2-Compat IGMPv2-Compat IGMPv2-Compat IGMPv2-Compat IGMPv2-Compat Uptime 12:39:00 12:39:00 12:39:00 12:39:00 12:39:00 12:39:00 12:39:00 12:39:00 12:39:00 12:39:00 12:39:00 12:39:00 12:39:00 12:39:00 12:39:00 12:39:00 Expires 00:01:58 00:01:58 00:01:58 00:01:58 00:01:58 00:01:58 00:01:58 00:01:58 00:01:58 00:01:58 00:01:58 00:01:58 00:01:58 00:01:58 00:01:58 00:01:58 Last Reporter 121.1.1.10 121.1.1.10 121.1.1.10 121.1.1.10 121.1.1.10 121.1.1.10 121.1.1.10 121.1.1.10 121.1.1.10 121.1.1.10 121.1.1.10 121.1.1.10 121.1.1.10 121.1.1.10 121.1.1.10 121.1.1.10 IGMP snooping IGMP snooping uses the information in IGMP packets to generate a forwarding table that associates ports with multicast groups. When switches receive multicast frames, they forward them to their intended receivers. OS10 supports IGMP snooping on virtual local area network (VLAN) interfaces. Effective with OS10 release 10.4.3.0, IGMP snooping is enabled by default. NOTE: OS10 supports IGMP snooping only with proxy reporting. OS10 does not relay the IGMP join packets received from hosts as is. Instead, OS10 generates, bundles, and sends IGMP join packets to mrouter port based on the version of IGMP queries received from IGMP routers. Proxy reporting reduces the number of IGMP control packets sent to the multicast router. Configure IGMP snooping • Enable IGMP snooping globally using the ip igmp snooping enable command in CONFIGURATION mode. This command enables IGMP snooping on all VLAN interfaces. NOTE: With IGMP snooping configured, OS10 does not support scale profile VLAN configuration. To use scale profile configuration with IGMP snooping, use the mode l3 command. • (Optional) Disable IGMP snooping on specific VLAN interfaces using the no ip igmp snooping command in VLAN INTERFACE mode. • (Optional) Multicast flood control is enabled by default. To disable the multicast flood restrict feature, use the no multicast snooping flood-restrict command in CONFIGURATION mode. To reenable the feature globally, use the multicast snooping flood-restrict command in CONFIGURATION mode. • In a network, the snooping switch is connected to a multicast Router that sends IGMP queries. On a Layer 2 network that does not have a multicast router, you can configure the snooping switch to act as querier. Use the ip igmp snooping querier command in VLAN INTERFACE mode to send the queries. • OS10 learns the multicast router interface dynamically based on the interface on which IGMP membership query is received. To assign a multicast router interface statically, use the ip igmp snooping mrouter interface interface-type command in VLAN INTERFACE mode. NOTE: IGMP snooping dynamically detects the mrouter interface based on IGMP queries that it receives. If there are more than one multicast routers connected to the snooping switch, one of them will send IGMP queries and the interface connected to that router is dynamically learnt as an mrouter port. You must configure the interfaces connected to other multicast routers as static mrouter port. • (Optional) Configure the IGMP version using the ip igmp version version-number command in VLAN INTERFACE mode. • (Optional) The fast leave option allows the IGMP snooping switch to remove an interface from the multicast group immediately on receiving the leave message. Enable fast leave with the ip igmp snooping fast-leave command in VLAN INTERFACE mode. • (Optional) Configure the time interval for sending IGMP general queries with the ip igmp snooping query-interval query-interval-time command in VLAN INTERFACE mode. • (Optional) Configure the maximum time for responding to a query advertised in IGMP queries using the ip igmp snooping query-max-resp-time query-response-time command in VLAN INTERFACE mode. • (Optional) Configures the time interval between group-specific IGMP query messages with the ip igmp snooping last- member-query-interval query-interval-time command in VLAN INTERFACE mode. 754 Multicast
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