Specifications

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Catalyst 4500 Se ries S wit ch C is co IO S C om mand R efer ence —Re lease I OS XE 3 .3.0 XO(1 5.1 (1)XO)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
ipv6 mld snooping
ipv6 mld snooping
To enable IP version 6 (IPv6) Multicast Listener Discovery (MLD) snooping globally or on the specified
VLAN, use t he ip v6 mld snoop ing command without keywords. To dis able ML D snoopin g on a s witch
or the VLAN, use the no form of this command.
ipv6 mld snooping [vlan vlan-id]
no ipv6 mld snoop ing [ vlan vlan-id]
Syntax Description
Defaults MLD snooping is glob ally disabled on the swi tch.
MLD snooping is enabled on all VLANs. However, MLD snooping must be global ly enabled before
VLAN snooping can take place.
Command Modes Global configura tion mode
Usage Guidelines When MLD snooping is globally disabled, it is disabled on all the existing VLAN interfaces. When you
globally enable MLD snooping , it is enabled on all VLAN inter faces that are in the default state
(enabled). VLAN configuration ove rrides global config uration on interfaces on whic h MLD snooping
has been disabled .
If MLD snooping is globally disabled , you cannot enable it on a VLAN . If MLD snooping is globally
enabled, you can disable it on indivi dual VLANs.
VLAN numbers 1002 through 1005 are reserve d for Token Ring and FDDI VLANs and cannot be used
in MLD snooping.
Examples This e xample shows how to globa lly enabl e MLD snooping:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# ipv6 mld snooping
Switch(config)# end
Switch#
This example shows how to disable MLD sn ooping on a VLAN:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# no ipv6 mld snooping vlan 11
Switch(config)# end
Switch#
You can verify your settings by entering the show ipv6 mld snooping user EXEC command.
vlan vlan-id (Optional) Enables or disables I Pv6 MLD snoopin g on the spec ified VLAN.
The VLAN ID range is 1 to 1001 and 1006 to 40 94.