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 last-listener-query-int erval
ipv6 mld sno oping last-li stener-query-int erval
To configure IP version 6 (IPv6) Multicast Listener Discovery (MLD) snooping last-listener query
interval on the switch or on a VL AN, use the ipv6 mld snooping last-listener-query-interval
command. To reset the query time to the default settings, use the no form of this command.
ipv6 mld snooping [vlan vlan-id] last-listener-query-interval integer_value
no ipv6 mld snoop ing [ vlan vlan-id] last-listener-query-interval
Syntax Description
Command Default The default globa l query interva l (maxi mum response tim e) is 10 00 (1 second) .
The default VLAN query interval (maximum response time) is 0 (the global count is used).
Command Modes Global configura tion mode
Usage Guidelines The last-listener-query-interval time is the maximum time that a multicast switch waits after issuing a
Mulitcast Address Specific Query (MASQ) before deleting a port from the multicast group.
In MLD snooping, when the IPv6 multicast switch receives an MLD leave message, it sends out queries
to hosts belonging to the multicast group. If there are no responses from a port to a MASQ for a length
of time, the switch deletes the port from the membership database of the multicast address. The last
listener query interval is the maxi mum time that the switch wai ts before deleting a nonresp onsive port
from the multicast group.
When a VLAN query interval is set, the global query interval is overridden. When the VLAN interval is
set at 0, the global value 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 interval to 2 seconds:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# ipv6 mld snooping last-listener-query-interval 2000
Switch(config)# end
Switch#
This example shows how to set the last-listener query interval for VLAN 1 to 5.5 seconds:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# ipv6 mld snooping vlan 1 last-listener-query-interval 5500
vlan vlan-id (Optional) Configures last-listener query interval on the specified VLAN.
The VLAN ID range is 1 to 1001 and 1006 to 40 94.
integer_value Sets the time period (in thousandths of a second) that a multicast switch must
wait after issuing a MASQ before deleting a port from the multicast group.
The range is 100 to 32,768. The defaul t is 1000 (1 second),