Comtrend Corporation NexusLink 3120 User Manual page 114

Multicast Strict Grouping Enforcement:
Enable/Disable multicast strict grouping.
Field
Default Version
Query Interval
Query Response Interval
Last Member Query
Interval
Robustness Value
Maximum Multicast
Groups
Maximum Multicast Data
Sources (for IGMPv3)
Maximum Multicast
Group Members
Fast Leave Enable
IGMP Group Exception List
Group addresses which are excluded from IGMP service.
Description
Define IGMP using version with video server.
The query interval is the amount of time in seconds
between IGMP General Query messages sent by the
router (if the router is the querier on this subnet). The
default query interval is 125 seconds.
The query response interval is the maximum amount
of time in seconds that the IGMP router waits to
receive a response to a General Query message. The
query response interval is the Maximum Response
Time field in the IGMP v2 Host Membership Query
message header. The default query response interval
is 10 seconds and must be less than the query
interval.
The last member query interval is the amount of time
in seconds that the IGMP router waits to receive a
response to a Group-Specific Query message. The last
member query interval is also the amount of time in
seconds between successive Group-Specific Query
messages. The default last member query interval is
10 seconds.
The robustness variable is a way of indicating how
susceptible the subnet is to lost packets. IGMP can
recover from robustness variable minus 1 lost IGMP
packets. The robustness variable should be set to a
value of 2 or greater. The default robustness variable
value is 2.
Setting the maximum number of Multicast groups.
Define the maximum multicast video stream number.
Setting the maximum number of groups that ports
can accept.
When you enable IGMP fast-leave processing, the
switch immediately removes a port when it detects an
IGMP version 2 leave message on that port.
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