D-Link DXS-1210-12TC Reference Manual page 222

Command Default Level
Level: 12.
Usage Guideline
The command is only available for VLAN interface configuration.
Example
This example shows how to configure the query version to be 1 on VLAN 1000.
Switch# configure terminal
Switch(config)#vlan 1000
Switch(config-vlan)# ipv6 mld snooping query-version 1
Switch(config-vlan)#
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This command is used to set the robustness variable used in MLD snooping. Use the no form of this
command to revert to the default value.
ipv6 mld snooping robustness-variable VALUE
no ipv6 mld snooping robustness-variable
Parameters
VALUE
Default
By default, this value is 2.
Command Mode
Interface Configuration Mode.
Command Default Level
Level: 12.
Usage Guideline
The command is only available for VLAN interface configuration.
The robustness variable provides fine-tuning to allow for expected packet loss on an interface. The
value of the robustness variable is used in calculating the following MLD message intervals:
•
•
•
User can increase this value if a subnet is expected to be loose.
Example
This example shows how to configure the robustness variable to be 3 on interface VLAN 1000.
DXS-1210 Series Smart Managed Switch CLI Reference Guide
ipv6 mld snooping robustness-variable
Specifies the robustness variable. The range is from 1 to 7.
Group member interval - Amount of time that must pass before a multicast router decides
there are no more members of a group on a network. This interval is calculated as follows:
(robustness variable x query interval) + (1 x query response interval).
Other querier present interval - Amount of time that must pass before a multicast router
decides that there is no longer another multicast router that is the querier. This interval is
calculated as follows: (robustness variable x query interval) + (0.5 x query response interval).
Last listener query count - The number of group-specific queries sent before the router
assumes there are no local listeners of a group. The default number is the value of the
robustness variable.
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