D-Link DES-3028, Руководство пользователя

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DES-3028 DES-3028P DES-3028G DES-3052 DES-3052P Layer 2 Fast Ethernet Managed Switch
the IGMP Snooping Settings.
VLAN Name This is the VLAN Name that, along with the VLAN ID, identifies the VLAN for which to modify
the IGMP Snooping Settings.
Query Interval This 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. This field allows an entry between
1
and
25
(seconds). Default =
10
.
Robustness Value 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
.
Router 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. The default setting is 2.
Note: The leave timer does not need to be configured as its action has no effect on the
IGMP snooping settings.
Querier State Choose
Enabled
to enable transmitting IGMP Query packets or
Disabled
to disable. The
default is
Disabled
.
Querier Router
Behavior This read-only field describes the behavior of the router for sending query packets.
Querier
will denote that the router is sending out IGMP query packets.
Non-Querier
will denote that
the router is not sending out IGMP query packets. This field will only read
Querier
when the
Querier State and the State fields have been Enabled.
State Select
Enabled
to implement IGMP Snooping. This field is
Disabled
by default.
Multicast Fast Leave This parameter allows the user to enable the
Fast Leave
function.
Enabled
, this function will
allow members of a multicast group to leave the group immediately (without the
implementation of the Last Member Query Timer) when an IGMP Leave Report Packet is
received by the Switch. The default is
Disabled
.
Data Driven Learning
Aged Out This parameter allows the user to
Enable
or
Disable
the
Data Driven Learning Aged Out
function on the Switch.
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.
NOTE: The Fast Leave function is intended for IGMPv2 users wishing to
leave a multicast group and is best implemented on VLANs that have only
one host connected to each port. When one host of a group of hosts uses
the Fast Leave function, it may cause the inadvertent fast leave of other
hosts of the group.
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