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To configure an IPv6 multicast group policy:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface interface-type
interface-number
N/A
3.
Configure an IPv6 multicast
group policy on the interface.
mld
group-policy ipv6-acl-number
[
v
ersion-number
]
By default, no IPv6 multicast
group policy exists on an
interface. Hosts attached to the
interface can join any IPv6
multicast groups.
Adjusting MLD performance
Before adjusting MLD performance, complete the following tasks:
•
Enable IPv6 forwarding and configure an IPv6 unicast routing protocol so that all devices can
interoperate at the network layer.
•
Configure basic MLD features.
Configuring MLD query and response parameters
The following are MLD query and response parameters:
•
MLD querier's robustness variable
—Number of times for retransmitting MLD queries in case
of packet loss. A higher robustness variable makes the MLD querier more robust, but increases
the timeout time for IPv6 multicast groups.
•
MLD startup query interval
—Interval at which an MLD querier sends MLD general queries at
startup.
•
MLD startup query count
—Number of MLD general queries that an MLD querier sends at
startup.
•
MLD general query interval
—Interval at which an MLD querier sends MLD general queries to
check for IPv6 multicast group members on the network.
•
MLD last listener query interval
—In MLDv1, it sets the interval at which a querier sends
multicast-address-specific queries after receiving a done message. In MLDv2, it sets the
interval at which a querier sends multicast-address-and-source-specific queries after receiving
a report that changes IPv6 multicast source and group mappings.
•
MLD last listener query count
—In MLDv1, it sets the number of multicast-address-specific
queries that the querier sends after receiving a done message. In MLDv2, it sets the number of
multicast-address-and-source-specific queries that the querier sends after receiving a report
that changes IPv6 multicast group and source mappings.
•
MLD maximum response time
—Maximum time before a receiver responds with a report to an
MLD general query. This per-group timer is initialized to a random value in the range of 0 to the
maximum response time specified in the MLD query. When the timer value decreases to 0, the
receiver sends an MLD report to the group.
•
MLD other querier present timer
—Lifetime for an MLD querier after a non-querier receives an
MLD general query. If the non-querier does not receive a new query when this timer expires, the
non-querier considers that the querier has failed and starts a new querier election.
Configuration guidelines
When you configure the MLD query and response parameters, follow these restrictions and
guidelines:
