Configuring Mld Queries And Responses - HP A5500 SI Switch Series Configuration Manual

NOTE:
It is meaningless to configure an MLD snooping querier in an IPv6 multicast network that runs MLD.
Although an MLD snooping querier does not participate in MLD querier elections, it might affect MLD
querier elections because it sends MLD general queries with a low source IPv6 address.
For more information about MLD querier, see the chapter "MLD configuration."

Configuring MLD queries and responses

You can set the MLD general query interval based on the actual conditions of the network.
After receiving an MLD query—general query or multicast-address-specific query, a host starts a timer for
each IPv6 multicast group that it has joined. This timer is initialized to a random value in 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 MLD query that 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 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, configure the maximum response time to fill the Max Response time field.
•
For MLD multicast-address-specific queries, 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...
Enter system view
Enter MLD snooping view
Set the maximum response time
for MLD general queries
Set the MLD last-member query
interval
Configuring MLD queries and responses in a VLAN
Follow these steps to configure MLD queries and responses in a VLAN
To do...
Enter system view
Enter VLAN view
Set the MLD query interval
Set the maximum response time
for MLD general queries
Use the command...
system-view
mld-snooping
max-response-time interval
last-listener-query-interval interval
Use the command...
system-view
vlan vlan-id
mld-snooping query-interval
interval
mld-snooping max-response-time
interval
253
Remarks
—
—
Optional
10 seconds by default
Optional
1 second by default
Remarks
—
—
Optional
125 seconds by default
Optional
10 seconds by default