HP MSR2000/3000/4000 Router Series IP Multicast Configuration Guide

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Enabling MLD fast-leave processing
In some applications, such as ADSL dial-up networking, only one multicast receiver host is attached to an
interface 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 fast-leave processing on the
MLD querier.
With MLD fast-leave processing enabled, after receiving an MLD done message or a MLD state change
report message from a host, the MLD querier sends a leave notification to the upstream immediately
without first sending MLD multicast-address-specific queries to downstream hosts. This reduces leave
latency and preserves the network bandwidth.
To enable MLD fast-leave processing:
Ste
p
Command Remarks
1. Enter system view.
system-view
N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable MLD fast-leave
processing.
mld fast-leave [ group-policy
acl6-number ]
By default, the MLD fast-leave
processing is disabled.
Displaying and maintaining MLD
CAUTION:
The reset mld group command might cause IPv6 multicast data transmission failures.
Execute display commands in any view and reset commands in user view.
Task Command
Display MLD group information.
display mld [ vpn-instance vpn-instance-name ] group
[ ipv6-group-address | interface interface-type interface-number ] [ static |
verbose ]
Display MLD information.
display mld [ vpn-instance vpn-instance-name ] interface [ interface-type
interface-number ] [ verbose ]
Remove all the dynamic group
entries of an MLD group or all
MLD groups.
reset mld [ vpn-instance vpn-instance-name ] group { all | interface
interface-type interface-number { all | ipv6-group-address [ prefix-length ]
[ ipv6-source-address [ prefix-length ] ] } }
NOTE:
The reset mld group command cannot remove static MLD group entries.