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config mld_snooping querier
Purpose
Syntax
Description
Parameters
Restrictions
Example usage:
To configure the MLD snooping querier query interval to 125 secs and state enable:
DAS-3626:admin#config mld_snooping querier vlan default query_interval 125 state
enable
Command: config mld_snooping querier vlan default query_interval 125 state enable
Success.
DAS-3626:admin#
DAS-3600 Series Ethernet over VDSL Switch CLI Reference Manual
Used to configure the timers and the attributes of the MLD snooping.querier.
config mld_snooping querier [vlan <vlan_name 32> | vlanid <vidlist> |all ]
{ query_interval <sec 1-65535> | max_response_time <sec 1-25> | robustness_variable
<value 1-255> | last_listener_query_interval <sec 1-25> | state [enable|disable] |version
<value 1-2>}
This command is used to configure the timer in seconds between general query
transmissions, the maximum time in seconds to wait for reports from listeners, and the
permitted packet loss that guarantees MLD snooping.
vlan_name − The name of the VLAN for which MLD snooping is to be configured.
vidlist – The VIDs of the VLAN for which MLD snooping querier is to be configured.
query_interval − Specifies the amount of time in seconds between general query
transmissions. The default setting is 125 seconds.
max_reponse_time − The maximum time in seconds to wait for reports from listeners. The
default setting is 10 seconds.
robustness_variable − Provides fine-tuning to allow for expected packet loss on a subnet.
The value of the robustness variable is used in calculating the following MLD message
intervals:
•
group listener interval − Amount of time that must pass before a multicast router
decides there are no more listeners of a group on a network. This interval is
calculated as follows: (robustness variable * query interval) + (1 * 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 * query interval) + (0.5 * query
response interval).
•
last listener query count − 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.
•
By default, the robustness variable is set to 2. You might want to increase this value
if you expect a subnet to be lossy.
last_listener_query_interval − The maximum amount of time between group-specific query
messages, including those sent in response to done-group messages. You might lower this
interval to reduce the amount of time it takes a router to detect the loss of the last listener of a
group.
state − Allows you to enable or disable the MLD snooping function for the chosen VLAN.
version – The version of MLD Query sent by the switch.
Only Administrator and Operator-level users can issue this command.
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