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D-Link DWS-1008 CLI Manual 464
show igmp querier
Displays information about the active multicast querier, on one VLAN or all VLANs. Queriers are
listed separately for each VLAN. Each VLAN can have only one querier.
Syntax: show igmp querier [vlan vlan-id]
vlan vlan-id VLAN name or number. If you do not specify a VLAN, MSS displays querier
information for all VLANs.
Defaults: None.
Access: Enabled.
Examples: The following command displays querier information for VLAN orange:
DWS-1008# show igmp querier vlan orange
Querier for vlan orange
Port Querier-IP Querier-MAC TTL
---------------------------------------------------------------------
1 193.122.135.178 00:0b:cc:d2:e9:b4 23
The following command shows the information MSS displays when the querier is the switch
itself:
DWS-1008# show igmp querier vlan default
Querier for vlan default:
I am the querier for vlan default, time to next query is 20
The output indicates how many seconds remain before the pseudo-querier on the switch
broadcasts the next general query report to IP address 224.0.0.1, the multicast all-systems
group.
If IGMP snooping does not detect a querier, the output indicates this finding, as shown in the
following example:
DWS-1008# show igmp querier vlan red
Querier for vlan red:
There is no querier present on vlan red
This condition does not necessarily indicate a problem. For example, election of the querier might
be in progress.