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address when generating periodic queries. The no form of this command
disables IGMP Snooping Querier on the system. Use the optional address
parameter to set or reset the querier address.
If a VLAN has IGMP Snooping Querier enabled, and IGMP Snooping is
operationally disabled on the VLAN, IGMP Snooping Querier functionality is
disabled on that VLAN. IGMP Snooping Querier functionality is reenabled if
IGMP Snooping becomes operational on the VLAN.
The IGMP Snooping Querier application sends periodic general queries on
the VLAN to solicit membership reports.
Syntax
ip igmp snooping querier [vlan vlan-id] [address ip-address]
no ip igmp snooping querier [vlan vlan-id][address]
•
vlan-id — A valid VLAN number.
•
ip-address — An IPv4 address used for the source address.
Default Configuration
The IGMP Snooping Querier feature is globally disabled on the switch.
When enabled, the IGMP Snooping Querier stops sending queries if it
detects IGMP queries from a multicast-enabled router. The Snooping
Querier periodically (querier timer expiry) wakes up and listens for IGMP
queries, and if found, goes back to sleep. If no IGMP queries are heard, then
the Snooping Querier will resume querying.
Command Mode
Global Configuration mode
User Guidelines
When using the command in Global Configuration mode to configure a
snooping querier source address, the IPv4 address is the global querier
address. When using the command in VLAN Configuration mode to
configure a snooping querier source address, the IPv4 address is the querier
address for the VLAN. If there are no global or VLAN querier addresses
configured, then the management IP address is used as the IGMP snooping
querier source address. Using all zeros for the querier IP address disables it.
Layer 2 Switching Commands
481
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