Cisco Nexus 7000 Series Configuration Manual page 38

Configuring IGMP Interface Parameters
Parameter
Robustness value
Querier timeout
Query max response time
Query interval
Last member query response interval
Last member query count
Cisco Nexus 7000 Series NX-OS Multicast Routing Configuration Guide
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Description
Robustness variable that you can tune to reflect
expected packet loss on a congested network. You
can increase the robustness variable to increase the
number of times that packets are resent. Values range
from 1 to 7. The default is 2.
Number of seconds that the software waits after the
previous querier has stopped querying and before it
takes over as the querier. Values range from 1 to
65,535 seconds. The default is 255 seconds.
Maximum response time advertised in IGMP queries.
You can tune the burstiness of IGMP messages on
the network by setting a larger value so that host
responses are spread out over a longer time. This value
must be less than the query interval. Values range
from 1 to 25 seconds. The default is 10 seconds.
Frequency at which the software sends IGMP host
query messages. You can tune the number of IGMP
messages on the network by setting a larger value so
that the software sends IGMP queries less often.
Values range from 1 to 18,000 seconds. The default
is 125 seconds.
Interval in which the software sends a response to an
IGMP query after receiving a host leave message from
the last known active host on the subnet. If no reports
are received in the interval, the group state is deleted.
You can use this value to tune how quickly the
software stops transmitting on the subnet. The
software can detect the loss of the last member of a
group or source more quickly when the values are
smaller. Values range from 1 to 25 seconds. The
default is 1 second.
Number of times that the software sends an IGMP
query, separated by the last member query response
interval, in response to a host leave message from the
last known active host on the subnet. Values range
from 1 to 5. The default is 2.
Setting this value to 1 means that a missed packet in
either direction causes the software to remove the
multicast state from the queried group or channel. The
software may wait until the next query interval before
the group is added again.
Configuring IGMP