xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch CLI Reference Guide
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<vlanid_list> - Specify the VLAN ID list.
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.
<sec 1-65535> - Specify the amount of time in seconds between general query transmissions.
The default setting is 125 seconds.
max_response_time - Specify the maximum time in seconds to wait for reports from members.
<sec 1-25> - Specify the maximum time in seconds to wait for reports from members. The default
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:
1) 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).
15. 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).
16. Last member query count—Number of group-specific queries sent before the router
assumes there are no local members of a group. The default number is the value of the
robustness variable.
<value 1-7> - Specify the value between 1 and 7. Increase the value if you expect a subnet to be
lossy. The robustness variable is set to 2 by default.
last_member_query_interval - Specify the maximum amount of time between group-specific query
messages, including those sent in response to leave-group messages. You might lower this
interval to reduce the amount of time it takes a router to detect the loss of the last member of a
group.
<sec 1-25> - Specify the time between 1 and 25 seconds.
state - 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 - Allows the switch to be selected as an MLD Querier (sends MLD query packets).
disable - When disabled, the switch can not play the role as a querier.
version - 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 forward from
router ports or VLAN flooding.
<value 1-2> - Specify the values between 1 and 2.
Restrictions
Only Administrator, Operator and Power-User level users can issue this command.
Example
To configure the MLD snooping querier:
DGS-3420-28SC:admin#config mld_snooping querier vlan_name default query_interval
125 state enable
Command: config mld_snooping querier vlan_name default query_interval 125 state
enable
Success.
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