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enters when receives query from the layer 3 IGMP in the segments.
Example: Switch(config)#ip igmp snooping vlan 2 suppression-query-time 270
21.2.22 show ip igmp snooping
Command: show ip igmp snooping [vlan <vlan-id>]
Parameter: <vlan-id> is the VLAN number specified for displaying IGMP Snooping
messages.
Command Mode: Admin Mode
Usage Guide: If no VLAN number is specified, it will show whether global IGMP Snooping
switch is on, which VLAN is configured with l2-general-querier function, and if a VLAN
number is specified, detailed IGMP messages for this VLAN will be shown.
Example:
1. Show IGMP Snooping summary messages of the switch
Switch(config)#show ip igmp snooping
Global igmp snooping status: Enabled
L3 multicasting: running
Igmp snooping is turned on for vlan 1(querier)
Igmp snooping is turned on for vlan 2
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Displayed Information
Explanation
Global igmp snooping status
Whether the global igmp snooping switch on the switch
is on
L3 multicasting
whether the layer 3 multicast protocol of the switch is
running
Igmp snooping is turned on for
vlan 1(querier)
which VLANs on the switch is enabled with igmp
snooping function, whether they are l2-general-querier
2. Display the IGMP Snooping summary messages of vlan1.
Switch#show ip igmp snooping vlan 1
Igmp snooping information for vlan 1
Igmp snooping L2 general querier :Yes(COULD_QUERY)
Igmp snooping query-interval :125(s)
Igmp snooping max reponse time :10(s)
Igmp snooping robustness :2