HP VSR1000 Configuration Manual page 246

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:
•
You can configure the MLD query and response parameters globally for all interfaces in MLD
view or for an interface in interface view. For an interface, the interface-specific configuration
takes priority over the global configuration.
•
To avoid frequent MLD querier changes, set the MLD other querier present timer greater than
the MLD general query interval. In addition, configure the same MLD other querier present timer
for all MLD routers on the same subnet.
•
To speed up the response to MLD queries and avoid simultaneous timer expirations that cause
MLD report traffic bursts, you must set an appropriate maximum response time.
For MLD general queries, the maximum response time is set by the max-response-time
command.
For MLD multicast-address-specific queries or MLD multicast-address-and-source-specific
queries, the maximum response time equals the MLD last listener query interval.
Configuring the MLD query and response parameters globally
Step
Enter system view.
1.
Enter MLD view.
2.
Set the MLD querier's
3.
robustness variable.
Set the MLD startup query
4.
interval.
Set the MLD startup query
5.
count.
Set the MLD general query
6.
interval.
Set the MLD last listener
7.
query interval.
Set the MLD last listener
8.
query count.
Command
system-view
mld [ vpn-instance
vpn-instance-name ]
robust-count count
startup-query-interval interval
startup-query-count count
query-interval interval
last-listener-query-interval
interval
last-listener-query-count count
238
Remarks
N/A
N/A
By default, the MLD querier's
robustness variable is 2.
By default, the MLD startup query
interval equals one quarter of the
MLD general query interval.
By default, the MLD startup query
count equals the MLD querier's
robustness variable.
By default, the MLD general query
interval is 125 seconds.
By default, the MLD last listener
query interval is 1 second.
By default, the MLD last listener
query count equals the MLD
querier's robustness variable.