H3C Technologies H3C S12500 Series Switches - Manual (Page 371)

355
Configuring MLD query and response parameters on an interface
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Configure the MLD querier's
robustness variable.
mld robust-count robust-value
2 by default.
A higher robustness variable
makes the MLD querier more
robust but results in a longer IPv6
multicast group timeout time.
4. Configure the startup query
interval.
mld startup-query-interval interval
By default, the startup query
interval is one-quarter of the "MLD
query interval."
5. Configure the startup query
count.
mld startup-query-count value
By default, the startup query count
is the same as the MLD querier's
robustness variable.
6. Configure the MLD query
interval.
mld timer query interval 125 seconds by default.
7. Configure the maximum
response delay for MLD
general query messages. mld max-response-time interval 10 seconds by default.
8. Configure the MLD last
listener query interval. mld last-listener-query-interval
interval
1 second by default.
9. Configure the MLD other
querier present interval. mld timer other-querier-present
interval
By default, the other querier
present interval is determined by
the formula "Other querier present
interval (in seconds) = [ MLD query
interval ] × [ MLD querier's
robustness variable ] + [ maximum
response delay for MLD general
query ] / 2."
Configuring MLD fast-leave processing
In some applications, such as ADSL dial-up networking, only one multicast receiver host is attached to a
port of the MLD querier. To allow fast response to the MLD done messages of the host when it switches
frequently from one IPv6 multicast group to another, you can enable MLD fast-leave processing on the
MLD querier.
With fast-leave processing enabled, after receiving an MLD done message from a host, the MLD querier
sends a leave notification to the upstream immediately without first sending MLD
multicast-address-specific queries. In this way, the leave latency is reduced and the network bandwidth
is saved.
Configuring MLD fast-leave processing globally
Step Command Remarks
1. Enter system view. system-view N/A