H3C S9500 Series Operation Manual page 18

Operation Manual – IGMP Snooping
H3C S9500 Series Routing Switches
the range of 0 to the maximum response time (the host obtains the value of the
maximum response time from the Max Response Time field in the IGMP query it
received). When the timer value comes down to 0, the host sends an IGMP report to the
corresponding multicast group.
An appropriate setting of the maximum response time for IGMP queries allows hosts to
respond to queries quickly and avoids bursts of IGMP traffic on the network caused by
reports simultaneously sent by a large number of hosts when corresponding timers
expires simultaneously.
For IGMP general queries, you can configure the maximum response time to fill
their Max Response time field.
For IGMP group-specific queries, you can configure the IGMP last-member query
interval to fill their Max Response time field. Namely, for IGMP group-specific
queries, the maximum response time equals to the IGMP last-member query
interval.
I. Configuring IGMP queries and responses globally
Follow these steps to configure IGMP queries and responses globally:
Enter system view
Enter IGMP Snooping
view
Configure the maximum
response time to IGMP
general queries
Configure the IGMP
last-member query
interval
II. Configuring IGMP queries and responses in a VLAN
Follow these steps to configure IGMP queries and responses in a VLAN:
Enter system view
Enter VLAN view
Configure IGMP general
query interval
Configure the maximum
response time to IGMP
general queries
To do...
system-view
igmp-snooping
max-response-time
interval
last-member-query-inter
val interval
To do...
system-view
vlan vlan-id
igmp-snooping
query-interval interval
igmp-snooping
max-response-time
interval
Chapter 1 IGMP Snooping Configuration
Use the command...
Use the command...
1-16
Remarks
—
—
Optional
10 seconds by default
Optional
1 second by default
Remarks
—
—
Optional
60 second by default
Optional
10 seconds by default