D-Link xStack Reference Manual page 607

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xStack DGS-3120 Series Layer 3 Managed Gigabit Switch CLI Reference Guide
Format
config mld_snooping querier [vlan_name <vlan_name 32> | vlanid <vlanid_list> | all]
{query_interval <sec 1-65535> | max_response_time <sec 1-25> | robustness_variable
<value 1-7> | last_listener_query_interval <sec 1-25> | state [enable | disable] | version
<value 1-2>}(1)
Parameters
vlan_name - Specify the name of the VLAN for which MLD snooping querier is to be configured.
<vlan_name 32> - Enter the VLAN name here. The VLAN name can be up to 32 characters
long.
vlanid - Specify the ID of the VLAN for which MLD snooping querier is to be configured.
<vlanid_list> - Enter the VLAN ID list here.
all - Specify all VLANs for which MLD snooping querier is to be configured.
query_interval - Specify the amount of time in seconds between general query transmissions.
The default setting is 125 seconds.
<sec 1-65535> - Enter the query interval value here. This value must be between 1 and
65535 seconds.
max_reponse_time - Specify the maximum time in seconds to wait for reports from listeners.
The default setting is 10 seconds.
<sec 1-25> - Enter the maximum response time value here. This value must be between 1
and 25 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:
<value 1-7> - Enter the robustness variable value here. This value must be between 1 and 7.
•
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 loosely.
last_listener_query_interval - (Optional) Specify 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.
<sec 1-25> - Enter the last listener query interval value here. This value must be between 1
and 25 seconds.
state - (Optional) This allows the Switch to be specified as an MLD Querier (sends MLD query
packets) or a Non-Querier (does not send MLD query packets). Set to enable or disable.
enable - Enter enable to enable the MLD querier state here.
disable - Enter disable to disable the MLD querier state here.
version - (Optional) Specify the version of MLD packet that will be sent by this port. If a MLD
packet received by the interface has a version higher than the specified version, this packet
will be dropped.
<value 1-2> - Enter the version number value here. This value must be between 1 and 2.
Restrictions
Only Administrator, Operator and Power-User level users can issue this command.
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