H3C S7500 Series Ethernet Switches Operation Manual

Operation Manual – Multicast
H3C S7500 Series Ethernet Switches Chapter 6
IGMP Configuration
6-8
To do... Use the command... Remarks
Enable IGMP on the
current interface
igmp enable
Required
By default, if the IP
multicast routing protocol
is enabled globally, IGMP
is enabled on all the
layer-3 interfaces
automatically.
Configure the query
interval
igmp timer query
seconds
Optional
The query interval is 60
seconds by default.
Configuring the interval of
sending IGMP
group-specific query
messages
igmp
lastmember-queryinterv
al seconds
Optional
By default, the interval of
sending IGMP
group-specific query
messages is 1 second.
Configuring the times of
sending IGMP
group-specific query
messages
igmp robust-count
robust-value
Optional
By default, the times of
sending IGMP
group-specific query
messages is 2.
Configure the maximum
lifetime of an IGMP
querier
igmp timer
other-querier-present
seconds
Optional
z The lifetime of an
IGMP querier is 120
seconds by default.
z If the Layer 3 switch
does not receive query
messages in two times
of the interval specified
by the igmp timer
query command, the
former querier is
considered as
ineffective.
Configure the maximum
IGMP query response
time
igmp
max-response-time
seconds
Optional
The maximum IGMP
query response time is 10
seconds.
Caution:
When there are multiple multicast routers in a network segment, the querier is
responsible for sending IGMP query messages to all the hosts in the network segment.