Enabling The Mld Snooping Querier; Configuring Parameters For Mld General Queries And Responses - HP FlexFabric 5950 series Configuration Manual

•
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
When you enable the MLD snooping querier, follow these 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.
•
On a VXLAN network, the MLD snooping querier in a VSI does not include VLAN tags in MLD
general queries. As a best practice, do not enable the MLD snooping querier in a VSI if the VSI
uses the Ethernet access mode. For more information about the Ethernet access mode,
see VXLAN Configuration Guide.
Configuration procedure
To enable the MLD snooping querier for a VLAN or VSI:
Step
1. Enter system view.
2. Enter VLAN view or VSI
view.
3. Enable the MLD snooping
querier for the VLAN or VSI.
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 or VSI 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 set the maximum response time for MLD general queries globally for all VLANs and VSIs in
MLD-snooping view, for a VSI in VSI view, or for a VLAN in VLAN view. For a VSI, the VSI-specific
Command
system-view
•
Enter VLAN view:
vlan vlan-id
•
Enter VSI view:
vsi vsi-name
mld-snooping querier
298
Remarks
N/A
N/A
By default, the MLD snooping
querier is disabled for a VLAN or
VSI.