Specifications

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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
ipv6 mld snooping last- listener -quer y-count
ipv6 mld sno oping last-li stener-query-c ount
To configure IP version 6 (IPv6) Multicast Listener Discovery Mulitcast Address Specific Queries
(MASQs) that will be sent before aging ou t a client, use the ipv6 mld snooping
last-listener-query-count command. To reset the query count to the default settings, use the no form of
this command.
ipv6 mld snooping [vlan vlan-id] last-listener-query-count integer_value
no ipv6 mld snoop ing [v lan vlan-id] last-listener-query-count
Syntax Description
Command Default The default global count is 2.
The default VLAN count is 0 (the global count is used).
Command Modes Global configura tion mode
Usage Guidelines In MLD snooping, the IPv6 multicast switch 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 a n IGMP Leave message ). When
Immediate Leave is not configured (it s hould not be configured 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 c ount overrides the value configured gl obally.
When the VLAN count is not configured (se t to the default of 0), the globa l count is used.
VLAN numbers 1002 through 1005 are reserve d for Token Ring and FDDI VLANs and cannot be used
in MLD snooping.
Examples This example shows how to globally set the la st-listener query count:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# ipv6 mld snooping last-listener-query-count 1
Switch(config)# end
Switch#
This example shows how to set the last-listener query count for VLAN 10:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# ipv6 mld snooping vlan 10 last-listener-query-count 3
Switch(config)# end
Switch#
vlan vlan-id (Optional) Configures last-listener query count on the specified VLAN. The
VLAN ID range is 1 to 1001 and 1006 to 4094.
integer_value The integer range is 1 to 7.