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27. IGMP Snooping Commands
Parameters
vlan_name
Specify the name of the VLAN for which IGMP snooping querier is to be configured.
<vlan_name 32>
Specify the VLAN name. The maximum length is 32 characters.
vlanid
Specify the VLAN ID list.
<vlanid_list>
Specify the VLAN ID list.
all
Specify to configure all VLANs and VLAN IDs.
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 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 IGMP message intervals:
・ 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).
・ 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).
・ 3.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.
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