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XG2000 series User's Guide
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All Rights Reserved, Copyright (C) PFU LIMITED 2009
5.15.18 ip snooping querier
Function
The IGMP Querier function sends an IGMP General Query message to each terminal node instead of the multicast router if no
multicast router exists on the network segment.
This command enables the IGMP querier. The query message transmission interval (called “Query interval”) is calculated
based on the query message transmission frequency and the group valid time interval (called “Group member interval”) as
follows.
z Query interval = (Group-membership-interval – 10) / send-query-count (seconds)
The device does not send Query messages when there is a multicast router on the network.
Use the no form to return to the default setup.
Prompt
xg(config-vlan)#
Command syntax
ip snooping querier ip A.B.C.D
no ip snooping querier
Parameter
z querier
Enables the IGMP querier function.
z ip A.B.C.D
Specifies the source IP address of Query messages to be sent by the IGMP querier.
The IP address can be 0.0.0.0 or within the range of 1.0.0.1 to 126.255.255.254, 128.0.0.1
to 191.255.255.254, or 192.0.0.1 to 223.255.255.254.
Command type
Configuration command
Default
None
Message
% Global IGMP snooping is not enabled.
Explanation
Global IGMP snooping is disabled on the system.
Solution
Enable global IGMP snooping using the “ip snooping protocol” command first then execute
the command again.
% IGMP snooping vlan-%1$ is not enabled.
Explanation
IGMP snooping on the specified VLAN is disabled.
[[Inserted string]]%1$: Specified VID
Solution
Enable IGMP snooping on the VLAN using the “ip snooping vlan” command first, then execute
the command again.
% Invalid IP-address.
Explanation
The IP address was specified in an incorrect format or an incorrect address was specified.
Solution
Specify the IP address in the correct format and execute the command.
Example
Enable an IGMP querier on VLAN 2 and set the query transmission source IP address to "192.168.1.200.”
xg(config)# interface vlan 2
xg(config-vlan)# ip snooping querier ip 192.168.1.200