H3C Technologies H3C S3100 Series Switches - Manual (Page 321)

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the maximum response time (the host obtains the value of the maximum response time from the Max
Response Time field in the MLD query it received). When the timer value comes down to 0, the host
sends an MLD report to the corresponding IPv6 multicast group.
An appropriate setting of the maximum response time for MLD queries allows hosts to respond to
queries quickly and avoids bursts of MLD traffic on the network caused by reports simultaneously sent
by a large number of hosts when the corresponding timers expire simultaneously.
z For MLD general queries, you can configure the maximum response time to fill their Max Response
time field.
z For MLD multicast-address-specific queries, you can configure the MLD last-member query
interval to fill their Max Response time field. Namely, for MLD multicast-address-specific queries,
the maximum response time equals to the MLD last-member query interval.
Configuring MLD queries and responses globally
Follow these steps to configure MLD queries and responses globally:
To do... Use the command... Remarks
Enter system view system-view —
Enter MLD snooping view mld-snooping —
Configure the maximum response
time for MLD general queries
max-response-time interval
Optional
10 seconds by default
Configure the MLD last-member
query interval last-listener-query-interval
interval
Optional
1 second by default
Configuring MLD queries and responses in a VLAN
Follow these steps to configure MLD queries and responses in a VLAN
To do... Use the command... Remarks
Enter system view system-view —
Enter VLAN view vlan vlan-id —
Configure MLD query interval
mld-snooping query-interval
interval Optional
125 seconds by default
Configure the maximum response
time for MLD general queries mld-snooping
max-response-time interval Optional
10 seconds by default
Configure the MLD last-member
query interval
mld-snooping
last-listener-query-interval
interval
Optional
1 second by default
Make sure that the MLD query interval is greater than the maximum response time for MLD general
queries; otherwise undesired deletion of IPv6 multicast members may occur.