Specifications

xStack DGS-3400 Series Layer 2 Gigabit Managed Switch CLI Manual
config mld_snooping querier
max_response_time <sec 1-25> - The maximum time to wait for reports from listeners.
The user may specify a time between 1 and 25 seconds with a default setting of 10
seconds.
robustness_variable <value 1-255> - Provides fine-tuning to allow for expected packet
loss on a subnet. The user may choose a value between 1 and 255 with a default
setting of 2. If a subnet is expected to be lossy, the user may wish to increase this
interval.
last_listener_query_interval <sec 1-25> - The maximum amount of time to be set
between group-specific query messages. This interval may be reduced to lower the
amount of time it takes a router to detect the loss of a last listener group. The user may
set this interval between 1 and 25 seconds with a default setting of 1 second.
state [enable | disable] – Enabling the querier state will set the Switch as a MLD
querier and disabling it will set it as a Non-querier. The default setting is disabled.
Restrictions Only administrator-level users can issue this command.
Example usage:
To configure the MLD snooping querier:
DGS-3400:4#config mld_snooping querier vlan default query_interval 125 state enable
Command : config mld_snooping querier vlan default query_interval 125 state enable
Success.
DGS-3400:4#
NOTE: The robustness variable of the MLD snooping querier is used in creating the following
MLD message intervals:
Group Listener Interval – This is the amount of time that must pass before a multicast router
decides that there are no more listeners present of a group on a network. Calculated as
(robustness variable * query interval ) + (1 * query interval).
Querier Present Interval - This is the amount of time that must pass before a multicast router
decides that there are no other querier devices present. Calculated as (robustness variable *
query interval) + (0.5 * query response interval).
Last Listener Query Count – This is the amount of group-specific queries sent before the
router assumes there are no local listeners in this group. The default value is the value of the
robustness variable.
show mld_snooping
Purpose Used to display the current status of the MLD snooping function on the Switch.
show mld_snooping {vlan<vlan_name 32}
This command allows users to display the current status of the MLD snooping
function on the Switch.
vlan <vlan_name 32> − The name of the VLAN for which to view the MLD
snooping configurations.
If no parameter is specified, the Switch will display all current MLD snooping
configurations.
Restrictions
Syntax
Description
Parameters
None.
Example usage:
To display the MLD snooping settings
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