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DES-3326 Layer 3 Fast Ethernet Switch User’s Guide
IGMP Settings
Figure 7-43. IGMP Interface Setup window
This menu allows the configuration of IGMP for each IP interface configured on the switch. IGMP can be
configured as Version 1 or 2 by toggling the Version field using the pull-down menu. The length of time
between queries can be varied by entering a value between 1 and 65,535 seconds in the Query field.
The maximum length of time between the receipt of a query and the sending of an IGMP response
report can be varied by entering a value in the Max Resp field.
The Robustness Var field allows IGMP to be ‘tuned’ for sub-networks that are expected to lose a lot of
packets. A high value (max. 255) for the robustness variable will help compensate for ‘lossy’ sub-
networks. A low value (min. 2) should be used for less ‘lossy’ sub-networks.
The following fields can be set:
Parameter Description
Interface Name
<System>
Allows the entry of the name of the IP interface that is to be
configured for IGMP. This must be a previously configured IP
interface.
Version <2>
Enter the IGMP version (1 or 2) that will be used to interpret
IGMP queries on the interface.
Query <125> Allows the entry of a value between 1 and 65535 seconds,
with a default of 125 seconds. This specifies the length of
time between sending IGMP queries.
Max Resp <10>
Sets the maximum amount of time allowed before sending an
IGMP response report. A value between 1 and 25 seconds
can be entered, with a default of 10 seconds.
Robustness Var
<2>
A tuning variable to allow for an interface that is expected to
lose a large number of packets. A value between 2 and 255
can be entered, with larger values being specified for
interface that are expected to lose larger numbers of packets.
IP
Displays the IP address corresponding to the IP interface
name entered above.
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