Mld Snooping Configuration Guidelines - Cisco Catalyst 2960 series Configuration Manual

How to Configure IPv6 MLD Snooping
Feature
TCN query count
MLD listener suppression

MLD Snooping Configuration Guidelines

When configuring MLD snooping, consider these guidelines:
• You can configure MLD snooping characteristics at any time, but you must globally enable MLD
• When the IPv6 multicast router is a Catalyst 6500 switch and you are using extended VLANs (in the
• MLD snooping and IGMP snooping act independently of each other. You can enable both features at
• The maximum number of address entries allowed for the switch or switch stack is 1000.
Enabling or Disabling MLD Snooping on the Switch (CLI)
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:
DETAILED STEPS
Command or Action
Step 1
configure terminal
Example:
Switch# configure terminal
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
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snooping by using the ipv6 mld snooping global configuration command for the configuration to take
effect.
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.
the same time on the switch.
Default Setting
2.
Enabled.
Purpose
Enters global configuration mode.