D-Link DGS-3212SR Layer 2 Gigabit Ethernet Switch
The following fields can be set:
Parameter
Description
Unit
This is the Unit ID of a switch in a switch stack. 15 indicates a DGS-
3212SR switch in standalone mode.
From/To
A consecutive group of ports may be configured starting with the selected
port.
State
This drop-down menu allows you to
Enable
or
Disable
STP for the
selected group of ports.
Cost
A Port Cost can be set from
1
to
200000000
. The lower the number, the
greater the probability the port will be chosen to forward packets.
Default port cost:
100Mbps port = 200000
Gigabit ports = 20000
Priority
<128>
A Port Priority can be from
0
to
240
. The lower the number, the greater the
probability the port will be chosen as the Root Port.
Migration
<No>
Select Yes or No. Choosing Yes will enable the port to migrate from 802.1d
STP status to 802.1w RSTP status. RSTP can coexist with standard STP,
however the benefits of RSTP are not realized on a port where an 802.1d
network connects to an 802.1w enabled network. Migration should be
enabled (yes) on ports connected to network stations or segments that will
be upgraded to 802.1w RSTP on all or some portion of the segment.
Edge
<No>
Select True or False. Choosing true designates the port as an edge port.
Edge ports cannot create loops, however an edge port can lose edge port
status if a topology change creates a potential for a loop. An edge port
normally should not receive BPDU packets. If a BPDU packet is received it
automatically loses edge port status. False indicates the port does not
have edge port status.
P2P
<Yes>
Select True or False. Choosing true indicates a point-to-point (p2p) shared
link. These are similar to edge ports however they are restricted in that a
p2p port must operate in full-duplex. Like edge ports, p2p ports transition to
a forwarding state rapidly thus benefiting from RSTP.
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