DXS-1210 Series Smart Managed Switch CLI Reference Guide
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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)#
28-10
ipv6 mld snooping robustness-variable
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
Specifies the robustness variable. The range is from 1 to 7.
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:
•
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.
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.