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xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch
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This window allows the configuration of IGMP for each IP interface configured on the Switch. IGMP can be configured as
Version 1, 2 or 3 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 31,744 seconds in the Query Interval 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 Response Time field.
The Robustness Variable field allows IGMP to be ‘tuned’ for sub-networks that are expected to lose many 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
Displays the name of the IP interface that is to be configured for IGMP. This must be a
previously configured IP interface.
IP Address
Displays the IP address corresponding to the IP interface name above.
Version
Enter the IGMP version (1, 2 or 3) that will be used to interpret IGMP queries on the
interface.
Query Interval
(1-31744)
Allows the entry of a value between 1 and 31744 seconds, with a default of 125 seconds.
This specifies the length of time between sending IGMP queries.
Max Response Time
(1-25)
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 Variable
(1-255)
A tuning variable to allow for sub-networks that are expected to lose a large number of
packets. A value between 1 and 255 can be entered, with larger values being specified for
sub-networks that are expected to lose larger numbers of packets.
Last Member Query
Interval (1-25)
Specifies the maximum amount of time between group-specific query messages, including
those sent in response to leave group messages. A value between 1 and 25. The default is 1
second.
State
This field can be toggled between Enabled and Disabled and enables or disables IGMP for
the IP interface. The default is Disabled.
Click Apply to implement changes made.