Name: Cisco Catalyst 3750-X
Brand: Cisco
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Catalyst 3750-X and 3560-X Switch Command Reference

OL-29704-01

Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands

ipv6 mld snooping last-listener-query-count

Use the ipv6 mld snooping last-listener-query-count global configuration command on the switch

stack or on a standalone switch to configure IP version 6 (IPv6) Multicast Listener Discovery Mulitcast

Address Specific Queries (MASQs) or that will be sent before aging out a client. Use the no form of this

command to reset the query count to the default settings.

ipv6 mld snooping [vlan vlan-id] last-listener-query-count integer_value

no ipv6 mld snooping [vlan vlan-id] last-listener-query-count

Note This command is available only if you have configured a dual IPv4 and IPv6 Switch Database

Management (SDM) template on the switch.

Syntax Description

Command Default The default global count is 2.

The default VLAN count is 0 (the global count is used).

Command Modes Global configuration

Command History

Usage Guidelines To configure the dual IPv4 and IPv6 template, enter the sdm prefer dual-ipv4-and-ipv6 {default | vlan)

global configuration command and reload the switch.

In MLD snooping, the IPv6 multicast router periodically sends out queries to hosts belonging to the

multicast group. If a host wants to leave a multicast group, it can silently leave or it can respond to the

query with a Multicast Listener Done message (equivalent to an IGMP Leave message). When

Immediate Leave is not configured (which it should not be if multiple clients for a group exist on the

same port), the configured last-listener query count determines the number of MASQs that are sent

before an MLD client is aged out.

When the last-listener query count is set for a VLAN, this count overrides the value configured

globally.When the VLAN count is not configured (set to the default of 0), the global count is used.

VLAN numbers 1002 through 1005 are reserved for Token Ring and FDDI VLANs and cannot be used

in MLD snooping.

vlan vlan-id (Optional) Configure last-listener query count on the specified VLAN. The

VLAN ID range is 1 to 1001 and 1006 to 4094.

integer_value The range is 1 to 7.

Release Modification

12.2(53)SE2 This command was introduced.

Cisco Catalyst 3750-X Command Reference

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