Extreme Networks EAS 100-24t Switch CLI - Page 150

Chapter 5: Layer 2 Features
Extreme Networks EAS 100-24t Switch CLI Manual
150
Example usage:
To configure the MLD snooping querier query interval to 125 seconds and state enable:
Syntax 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>}
Description 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 by MLD snooping.
Parameters <vlan_name 32> - The name of the VLAN for which MLD snooping is to be
configured.
<vidlist> - The list of VIDs.
all – Select to configure all the VLANs on the switch.
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. Increase this value if a subnet
is expected 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.
Restrictions Only Administrator-level users can issue this command.
#config mld_snooping querier vlan default query_interval 125
Command: config mld_snooping querier vlan default query_interval 125
Success.
#
config mld_snooping querier