User Guide
240
Configuring Layer 2 Multicast
MLD Snooping Configuration
Step 9
ipv6 mld snooping vlan-config
vlan-id-list
querier
(Optional) Enable MLD Snooping Querier for the VLAN. By default, it is disabled.
When enabled, the switch acts as an MLD Snooping Querier for the hosts in this VLAN. A
querier periodically sends a general query on the network to solicit membership information,
and sends group-specific queries when it receives done messages from hosts.
vlan-id-list:
Specify the ID or the ID list of the VLAN(s).
Note:
To enable MLD Snooping Querier for a VLAN, MLD Snooping should be enabled both globally
and in the VLAN.
After enabling MLD Snooping Querier feature, you need to specify the corresponding
parameters including the Last Member Query Count, Last Member Query Interval, Maximum
Response Time, Query Interval and General Query Source IP. Use the command below in global
configuration mode to configure the parameters:
ipv6 mld snooping vlan-config
vlan-id-list
querier { max-response-time
response-time
|
query-interval
interval
| general-query source-ip
ip-addr
| last-listener-query-count
num
|
last-listener-query-interval
interval
}
vlan-id-list:
Specify the ID or the ID list of the VLAN(s).
response-time:
Specify the host’s maximum response time to general query messages.
query-interval
interval:
Specify the interval between general query messages sent by the
switch.
ip-addr:
Specify the source IP address of the general query messages sent by the switch. It
should be a unicast address.
num:
Specify the number of group-specific queries to be sent. With MLD Snooping Querier
enabled, when the switch receives a done message, it obtains the address of the multicast
group that the host wants to leave from the message. Then the switch sends out MASQs to
this multicast group through the port receiving the done message. If specified count of MASQs
are sent and no report message is received, the switch will delete the multicast address from
the multicast forwarding table.
last-listener-query-interval
interval:
Specify the interval between MASQs.
Step 10
show ipv6 mld snooping vlan
vlan-id
Show the basic MLD snooping configuration in the specified VLAN.
Step 11
end
Return to privileged EXEC mode.
Step 12
copy running-config startup-config
Save the settings in the configuration file.
The following example shows how to enable MLD Snooping for VLAN 1, and configure the
member port aging time as 300 seconds, the router port aging time as 320 seconds, and
then enable Fast Leave and Report Suppression for the VLAN:
Switch#configure
Switch(config)#ipv6 mld snooping vlan-config
1
mtime
300
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