Configuration Prerequisites; Enabling The Mld Snooping Querier; Configuring Parameters For Mld General Queries And Responses - HP MSR1002-4 Configuration Manual

Configuration prerequisites

Before you configure the MLD snooping querier, complete the following tasks:
•
Enable MLD snooping for the VLAN.
•
Determine the MLD general query interval.
•
Determine the maximum response time for MLD general queries.

Enabling the MLD snooping querier

This feature enables the device to periodically send MLD general queries to establish and maintain
multicast forwarding entries at the data link Layer. You can configure an MLD snooping querier on a
network without Layer 3 multicast devices.
Configuration restrictions and guidelines
Do not enable the MLD snooping querier on an IPv6 multicast network that runs MLD. An MLD
snooping querier does not participate in MLD querier elections. However, it might affect MLD querier
elections if it sends MLD general queries with a low source IPv6 address.
Configuration procedure
To enable the MLD snooping querier for a VLAN:
Step
1. Enter system view.
2. Enter VLAN view.
3. Enable the MLD snooping
querier for the VLAN.
Configuring parameters for MLD general queries and
responses
CAUTION:
To avoid mistakenly deleting IPv6 multicast group members, make sure the MLD general query
interval is greater than the maximum response time for MLD general queries.
You can modify the MLD general query interval for a VLAN based on the actual network conditions.
A receiver host starts a report delay timer for each IPv6 multicast group that it has joined when it
receives an MLD general query. This timer is set to a random value in the range of 0 to the maximum
response time advertised in the query. When the timer value decreases to 0, the host sends an MLD
report to the corresponding IPv6 multicast group.
Set an appropriate value for the maximum response time for MLD general queries to speed up hosts'
responses to MLD general queries and avoid MLD report traffic bursts.
You can configure the parameters globally for all VLANs in MLD-snooping view or for a VLAN in
VLAN view. For a VLAN, the VLAN-specific configuration takes priority over the global configuration.
Configuring parameters for MLD general queries and responses globally
Step
1. Enter system view.
Command
system-view
vlan vlan-id
mld-snooping querier
Command
system-view
268
Remarks
N/A
N/A
By default, the MLD snooping
querier is disabled for a VLAN.
Remarks
N/A