DGS-1510/ME Series Metro Ethernet Switch CLI Reference Guide
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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
- Specifies 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
- Specifies the ID of the VLAN for which MLD snooping querier is to be configured.
<vlanid_list>
- Enter the VLAN ID list here.
all
- Specifies all VLANs 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.
<sec 1-65535>
- Enter the query interval value here. This value must be between 1 and 65535 seconds.
max_reponse_time
- Specifies 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
- Specifies to provide 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
- Specifies 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. The default setting is 1 second.
<sec 1-25>
- Enter the last listener query interval value here. This value must be between 1 and 25 seconds.
state
- Specifies the Switch as an MLD querier (sends MLD query packets) or a Non-querier (does not send MLD
query packets).
enable
- Specifies to enable the MLD querier state.
disable
- Specifies to disable the MLD querier state.
version
- Specifies the version of MLD packet that will be sent by the Switch.
<value 1-2>
- Enter the version number value here. This value must be between 1 and 2.
Restrictions
Only Administrators, Operators and Power-Users can issue this command.
Example
To configure the MLD snooping querier:
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