Cisco Catalyst 4500 Series - Ipv6 Mld Snooping Robustness-Variable

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
ipv6 mld snooping robustness-variable
ipv6 mld snooping robustness-variable
To configure the number of IP version 6 (IPv6) Multicast Listener Discovery (MLD) queries that the
switch sends before deleting a listener that does not respond, or to enter a VLAN ID to configure the
number of queries per VLAN, use the ipv6 mld snooping robustness-variable command. To reset the
variable to the default settings, use the no form of this command.
ipv6 mld snooping [vlan vlan-id] robustness-variable integer_value
no ipv6 mld snooping [vlan vlan-id] robustness-variable
Syntax Description
Command Default The default global robustness variable (number of queries before deleting a listener) is 2.
The default VLAN robustness variable (number of queries before aging out a multicast address) is 0,
which means that the system uses the global robustness variable for aging out the listener.
Command Modes Global configuration mode
Command History
Usage Guidelines Robustness is measured by the number of MLDv1 queries sent with no response before a port is removed
from a multicast group. A port is deleted when there are no MLDv1 reports received for the configured
number of MLDv1 queries. The global value determines the number of queries that the switch waits
before deleting a listener that does not respond, and it applies to all VLANs that do not have a VLAN
value set.
The robustness value configured for a VLAN overrides the global value. If the VLAN robustness value
is 0 (the default), the global value 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) Configures the robustness variable on the specified VLAN. The
VLAN ID range is 1 to 1001 and 1006 to 4094.
integer_value The robustness value ranges from 1 to 3.
Release Modification
12.2(40)SG This command was introduced on the Catalyst 4500.