C613-50631-01 Rev A Command Reference for IE340 Series 1656
AlliedWare Plus™ Operating System - Version 5.5.3-0.x
IGMP AND IGMP SNOOPING COMMANDS
IP
IGMP FLOOD SPECIFIC-QUERY
ip igmp flood specific-query
Overview Use this command if you want IGMP to flood specific queries to all VLAN member
ports, instead of only sending the queries to multicast group member ports.
Use the no variant of this command if you want IGMP to only send the queries to
multicast group member ports.
Syntax
ip igmp flood specific-query
no ip igmp flood specific-query
Default By default, specific queries are flooded to all VLAN member ports.
Mode Global Configuration
Usage In an L2 switched network running IGMP, it is considered more robust to flood all
specific queries. In most cases, the benefit of flooding specific queries to all VLAN
member ports outweighs the disadvantages.
However, sometimes this is not the case. For example, if hosts with very low CPU
capability receive specific queries for multicast groups they are not members of,
their performance may degrade unacceptably. In this situation, it is desirable for
IGMP to send specific queries to known member ports only. This minimizes the
performance degradation of such hosts. In those circumstances, use this
command to turn off flooding of specific queries.
Example To cause IGMP to flood specific queries only to multicast group member ports, use
the commands:
awplus# configure terminal
awplus(config)# no ip igmp flood specific-query
Related
commands
show ip igmp interface
Command
changes
Version 5.4.7-1.1: VRF-lite support added SBx8100.
Version 5.4.8-1.1: VRF-lite support added x930, SBx908 GEN2.
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