Configuring Layer 2 Multicast
MLD Snooping Configuration
User Guide
237
Step 3
ipv6 mld snooping drop-unknown
(Optional) Configure the way how the switch processes multicast streams that are sent to
unknown multicast groups as Discard. By default, it is Forward.
Unknown multicast groups are multicast groups that do not match any of the groups
announced in earlier IGMP membership reports, and thus cannot be found in the multicast
forwarding table of the switch.
Note:
IGMP Snooping and MLD Snooping share the setting of Unknown Multicast Groups, you
need to ensure IGMP Snooping is enabled globally. To enable IGMP Snooping globally, use the
ip igmp snooping
command in global configuration mode.
Step 4
show ipv6 mld snooping
Show the basic IGMP Snooping configuration.
Step 5
end
Return to privileged EXEC mode.
Step 6
copy running-config startup-config
Save the settings in the configuration file.
The following example shows how to enable MLD Snooping globally, and the way how the
switch processes multicast streams that are sent to unknown multicast groups as discard.
Switch#configure
Switch(config)#ipv6 mld snooping
Switch(config)#ipv6 mld snooping
Switch(config)#ipv6 mld snooping drop-unknown
Switch(config)#show ipv6 mld snooping
MLD Snooping :Enable
Unknown Multicast :Discard
...
Switch(config)#end
Switch#copy running-config startup-config
3.2.2 Configuring MLD Snooping for VLANs
Before configuring MLD Snooping for VLANs, set up the VLANs that the router ports and
the member ports are in. For details, please refer to
The switch supports configuring MLD Snooping on a per-VLAN basis. After MLD
Snooping is enabled globally, you also need to enable MLD Snooping and configure the
corresponding parameters for the VLANs that the router ports and the member ports are
in.
Downloaded from
