Technical information

ADC Telecommunications, Inc.
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HAPTER 17: IP MULTICAST
Non-querier If the current IGMP querier stops functioning, the non-querier
interface becomes the querier.
Querier Read-only. IP address of the IGMP querier on the IP subnet to
which this interface is attached.
Up Time Read-only. Time since the IP address of the IGMP querier
changed.
Version Version of IGMP running on this particular interface. For
IGMP to function properly, all routers on a network must be
configured to run the same version of IGMP. The default is 2
and the possible values are:
2 Version 2. If the Cuda 12000 encounters another host or
router on the network using Version 1, the Cuda 12000
reverts back to using Version 1.
1 Version 1
V2_ONLY Version 2 only. If the Cuda 12000 encounters another host or
router on the network using Version 1, the Cuda 12000
continues to run Version 2.
Query Interval
(secs)
Frequency, in seconds, that the IGMP host query packets are
transmitted on this particular interface. The default is 125
seconds with a range of 10 to 65535 seconds.
Max Response
Time (secs)
Maximum time to wait for a response to an IGMP Query
message before the group is deleted. The default is 10
seconds with a range of 1 to 25.
Robustness Allows you to compensate for the expected packet loss on a
subnet. If the loss is expected to be high, increase the value.
The default is 2 and the range is 1 to 255.
Last Query
Interval (secs)
A query is sent to determine if other hosts on the network
wish to receive traffic from the multicast group. The Last
Query Interval is the time between queries. You can tune this
parameter to modify the leave latency of the network. A
reduced value results in reduced time to detect the loss of the
last member of a group. The parameter is ignored for Version
1 of IGMP. The default is 1 and the range is 1 to 25 seconds.
Version 1
Querier Timer
Read-only. Remaining time until the Cuda 12000 determines
that no IGMPv1 routers are present on the interface. When
the value is greater than 0, the host replies to all queries with
V1 membership reports.
Table 17-1 Interface Details Window Parameters (continued)
Parameter Description