HP FlexNetwork 7500 Series Configuration Manual page 301

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 from the querier 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 guidelines:
•
You can configure the MLD query and response parameters for the current port in interface
view or globally for all ports in MLD view. The configuration made in interface view takes priority
over the configuration made in MLD view.
•
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.
Set the maximum response
9.
time for MLD general
queries.
10. Set the MLD other querier
present timer.
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
max-response-time time
other-querier-present-timeout
time
291
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.
By default, the maximum
response time for MLD general
queries is 10 seconds.
By default, the MLD other querier
present timer is [ MLD general
query interval ] × [ MLD
robustness variable ] +
[ maximum response time for
MLD general queries ] / 2.