H3C Technologies H3C S10500 Series Switches - Manual (Page 285)

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An appropriate setting of the maximum response time for MLD queries enables hosts to respond to
queries quickly and avoids bursts of MLD traffic on the network. Such burst can occur when a large
number of hosts simultaneously send reports when the corresponding timers expire simultaneously.
• For MLD general queries, you can configure the maximum response time to fill the Max Response
time field.
• For MLD multicast-address-specific queries, you can configure the MLD last-member query interval
to fill the Max Response time field. Namely, for MLD multicast-address-specific queries, the
maximum response time equals 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 —
Set the maximum response time for
MLD general queries
max-response-time interval
Required
10 seconds by default.
Set the MLD last-member query
interval
last-listener-query-interval interval
Required
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 —
Set the MLD query interval
mld-snooping query-interval
interval Required
125 seconds by default.
Set the maximum response time for
MLD general queries mld-snooping max-response-time
interval Required
10 seconds by default.
Set the MLD last-member query
interval mld-snooping
last-listener-query-interval interval Required
1 second by default.
CAUTION:
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 might occur.
Configuring source IPv6 addresses of MLD queries
This configuration allows you to change the source IPv6 address of MLD queries.
Follow these steps to configure source IPv6 addresses of MLD queries:
To do... Use the command... Remarks
Enter system view system-view —
Enter VLAN view vlan vlan-id —