xStack
®
DGS-3600 Series Layer 3 Managed Gigabit Ethernet Switch
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 subnetworks 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
subnetworks that are expected to lose larger numbers of packets. The default setting is 2.
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.
IGMP Check Subscriber Source Network Settings
This window allows users to configure IGMP check subscriber source network settings. When Check Subscriber Source Network
is enabled on an interface, every IGMP report/leave message received by the interface will be checked to see whether its source IP
is in the same network as the interface. If the check is disabled, an IGMP report/leave message with any source IP can be
processed by IGMP protocol.
To view this Table, click
L3 Features >
IP Multicast Routing Protocol
>
IGMP Check Subscriber Source Network Settings
,
as shown below:
Figure 4- 118. IGMP Check Subscriber Source Network Settings window
262
