D-Link DES-3526DC Product Manual - Page 55

VLAN Name, Query Interval, Max Response Time, Robustness Variable, Last Member Query, Interval

Page 55 highlights

xStack DES-3500 Series Layer 2 Stackable Fast Ethernet Managed Switch User Manual VLAN Name Query Interval Max Response Time Robustness Variable Last Member Query Interval Host Timeout Route Timeout Leave Timer Querier State State This is the VLAN Name that, along with the VLAN ID, identifies the VLAN the user wishes to modify the IGMP Snooping Settings for. The Query Interval field is used to set the time (in seconds) between transmitting IGMP queries. Entries between 1 and 65535 seconds are allowed. Default = 125. This determines the maximum amount of time in seconds allowed before sending an IGMP response report. The Max Response Time field allows an entry between 1 and 25 (seconds). Default = 10. Adjust this variable according to expected packet loss. If packet loss on the VLAN is expected to be high, the Robustness Variable should be increased to accommodate increased packet loss. This entry field allows an entry of 1 to 255. Default = 2. This field specifies the maximum amount of time between group-specific query messages, including those sent in response to leave group messages. Default = 1. This is the maximum amount of time in seconds allowed for a host to continue membership in a multicast group without the Switch receiving a host membership report. Default = 260. This is the maximum amount of time in seconds a route is kept in the forwarding table without receiving a membership report. Default = 260. This specifies the maximum amount of time in seconds between the Switch receiving a leave group message from a host, and the Switch issuing a group membership query. If no response to the membership query is received before the Leave Timer expires, the (multicast) forwarding entry for that host is deleted. Choose Enabled to enable transmitting IGMP Query packets or Disabled to disable. The default is Disabled. Select Enabled to implement IGMP Snooping. This field is Disabled by default. Click Apply to implement the new settings. Click the Show All IGMP Group Entries link to return to the Current IGMP Snooping Group Entries window. 41

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xStack DES-3500 Series Layer 2 Stackable Fast Ethernet Managed Switch User Manual
41
VLAN Name
This is the VLAN Name that, along with the VLAN ID, identifies the VLAN the user wishes to
modify the IGMP Snooping Settings for.
Query Interval
The Query Interval field is used to set the time (in seconds) between transmitting IGMP
queries. Entries between
1
and
65535
seconds are allowed. Default =
125
.
Max Response Time
This determines the maximum amount of time in seconds allowed before sending an IGMP
response report. The Max Response Time field allows an entry between
1
and
25
(seconds).
Default =
10
.
Robustness Variable
Adjust this variable according to expected packet loss. If packet loss on the VLAN is
expected to be high, the Robustness Variable should be increased to accommodate
increased packet loss. This entry field allows an entry of
1
to
255
. Default =
2
.
Last Member Query
Interval
This field specifies the maximum amount of time between group-specific query messages,
including those sent in response to leave group messages. Default =
1
.
Host Timeout
This is the maximum amount of time in seconds allowed for a host to continue membership
in a multicast group without the Switch receiving a host membership report. Default =
260
.
Route Timeout
This is the maximum amount of time in seconds a route is kept in the forwarding table
without receiving a membership report. Default =
260
.
Leave Timer
This specifies the maximum amount of time in seconds between the Switch receiving a leave
group message from a host, and the Switch issuing a group membership query. If no
response to the membership query is received before the Leave Timer
expires, the
(multicast) forwarding entry for that host is deleted.
Querier State
Choose
Enabled
to enable transmitting IGMP Query packets or
Disabled
to disable. The
default is
Disabled
.
State
Select
Enabled
to implement IGMP Snooping. This field is
Disabled
by default.
Click
Apply
to implement the new settings. Click the
Show All IGMP Group Entries
link to return to the
Current IGMP
Snooping Group Entrie
s window.