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xStack DGS/DXS-3300 Series Layer 3 Stackable Gigabit Ethernet Switch CLI Manual
141
config igmp_snooping querier
between general query transmissions. The default setting is 125
seconds.
max_response_time <sec 1-25> − Specifies the maximum time in
seconds to wait for reports from members. The default setting is 10
seconds.
robustness_variable <value 1-255> − Provides fine-tuning to allow for
expected packet loss on a subnet. The value of the robustness variable is
used in calculating the following IGMP message intervals:
• Group membership 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).
• 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).
• 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.
• By default, the robustness variable is set to 2. Increase this value
if a subnet is expected to be lossy.
last_member_query_interval <sec 1-25> − The maximum amount of time
between group-specific query messages, including those sent in
response to leave-group messages. Lowering this interval may reduce
the amount of time it takes a router to detect the loss of the last member
of a group.
state [enable | disable] − Allows the Switch to be specified as an IGMP
Querier or Non-querier.
Restrictions Only administrator-level users can issue this command.
Example usage:
To configure the igmp snooping:
DGS-3324SRi:4#config igmp_snooping querier default query_interval 125 state enable
Command: config igmp_snooping querier default query_interval 125 state enable
Success.
DGS-3324SRi:4#