Dell N1100-ON, Справочное руководство

Страница: 480 / 2332

Layer 2 Switching Commands
480
IGMP Snooping Querier Commands
Dell EMC Networking N1100-ON/N1500/N2000/N2100-
ON/N3000/N3100-ON/N4000 Series Switches
The IGMP Snooping Querier is an extension to the IGMP Snooping feature.
IGMP Snooping Querier allows the switch to simulate an IGMP router in a
Layer 2-only network, thus removing the need to have an IGMP Router to
collect and refresh the multicast group membership information. The querier
function simulates a small subset of the IGMP router functionality. IGMP
Snooping Querier is not recommended for networks in which a multicast
router is reachable.
In a network with IP multicast routing, an IP multicast router acts as the
IGMP querier. However, if it is required that the IP-multicast traffic in a
VLAN be switched and no multicast router is present in the network, the Dell
EMC Networking switch can be configured as an IGMP querier. When IGMP
Snooping Querier is enabled, the Querier sends out periodic IGMP General
Queries that trigger the multicast listeners/members to send their joins to the
querier so as to receive the multicast data traffic. IGMP snooping listens to
these reports to establish the appropriate L2 forwarding table entries.
The Dell EMC Networking supports version IGMP V1 and 2 for snooping
IGMP queries.
Commands in this Section
This section explains the following commands:
ip igmp snooping querier
This command enables IGMP Snooping Querier on the system (Global
Configuration mode) or on a VLAN. Using this command, you can specify
the IP address that the snooping querier switch should use as the source
ip igmp snooping querier ip igmp snooping querier timer expiry
ip igmp snooping querier election
participate
ip igmp snooping querier version
ip igmp snooping querier query-interval show ip igmp snooping querier