Configuring Parameters For Mld Queries And Responses; Configuring Mld Snooping Port Functions - HP 5920 series Configuration Manual

Configuring parameters for MLD queries and responses

When a multicast listening host receives an MLD query (general query or multicast-address-specific
query), it 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 delay advertised in the MLD query message.
When the timer value decreases to 0, the host sends an MLD report to the IPv6 multicast group.
To speed up the response of hosts to MLD queries and avoid simultaneous timer expirations causing MLD
report traffic bursts, you must properly set the maximum response delay.
• The maximum response delay for MLD general queries is set by the max-response-time command.
The maximum response delay for MLD multicast-address-specific queries is the same as the MLD
•
last-listener query interval, which is set by the last-listener-query-interval command.
You can configure parameters for MLD queries and responses either for the current VLAN in VLAN view
or globally for all VLANs in MLD-snooping view. If the configurations are made in both VLAN view and
MLD-snooping view, the configuration made in VLAN view takes priority.
Configuring parameters for MLD queries and responses globally
Step
1. Enter system view.
2. Enter MLD-snooping view.
3. Set the maximum response
delay for MLD general
queries.
4. Set the MLD last-listener query
interval.
Configuring parameters for MLD queries and responses in a VLAN
Step
1. Enter system view.
2. Enter VLAN view.
3. Set the maximum response
delay for MLD general queries
in the VLAN.
4. Set the MLD last-listener query
interval in the VLAN.

Configuring MLD snooping port functions

Before you configure MLD snooping port functions, complete the following tasks:
Enable MLD snooping for the VLAN.
•
Determine the aging timer for dynamic router ports.
•
Determine the aging timer for dynamic member ports.
•
Determine the addresses of the IPv6 multicast group and IPv6 multicast source.
•
Command
system-view
mld-snooping
max-response-time interval
last-listener-query-interval interval
Command
system-view
vlan vlan-id
mld-snooping max-response-time
interval
mld-snooping
last-listener-query-interval interval
103
Remarks
N/A
N/A
The default setting is 10 seconds.
The default setting is 1 second.
Remarks
N/A
N/A
The default setting is 10 seconds.
The default setting is 1 second.