Cisco Systems 3130 User Manual

24-7

Cisco Catalyst Blade Switch 3130 for Dell Software Configuration Guide

OL-13270-01

Chapter 24 Configuring IPv6 MLD Snooping

Configuring IPv6 MLD Snooping

Enabling or Disabling MLD Snooping

By default, IPv6 MLD snooping is globally disabled on the switch and enabled on all VLANs. When
MLD snooping is globally disabled, it is also disabled on all VLANs. When you globally enable MLD
snooping, the VLAN configuration overrides the global configuration. That is, MLD snooping is enabled
only on VLAN interfaces in the default state (enabled).

You can enable and disable MLD snooping on a per-VLAN basis or for a range of VLANs, but if you
globally disable MLD snooping, it is disabled in all VLANs. If global snooping is enabled, you can
enable or disable VLAN snooping.

Beginning in privileged EXEC mode, follow these steps to globally enable MLD snooping on the switch:

To globally disable MLD snooping on the switch, use the no ipv6 mld snooping global configuration
command.

Beginning in privileged EXEC mode, follow these steps to enable MLD snooping on a VLAN.

Note

When the IPv6 multicast router is a Catalyst 6500 switch and you are using extended VLANs (in the
range 1006 to 4094), IPv6 MLD snooping must be enabled on the extended VLAN on the Catalyst 6500
switch in order for the switch to receive queries on the VLAN. For normal-range VLANs (1 to 1005), it
is not necessary to enable IPv6 MLD snooping on the VLAN on the Catalyst 6500 switch.

To disable MLD snooping on a VLAN interface, use the no ipv6 mld snooping vlan vlan-id global
configuration command for the specified VLAN number.

Command

Purpose

Step 1

configure terminal

Enter global configuration mode.

Step 2

ipv6 mld snooping

Globally enable MLD snooping on the switch.

Step 3

end

Return to privileged EXEC mode.

Step 4

copy running-config startup-config

(Optional) Save your entries in the configuration file.