D-Link DES-3226L User Manual - Page 75

Port, Parameter, Description, State, Cost 1, Priority, Migrate, Con Ports, from 1

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DES-3226L Layer 2 Fast Ethernet Switch User's Guide The STP port settings that can be configured are: Parameter Port Description Number of port being configured. State Toggle between Enabled and Disabled. When STP is enabled, a change from link-down to link-up will trigger the Spanning Tree Protocol. STP will set the port to the listening state. After the forward delay, STP will set the port to the learning state. After another forward delay, STP will set the port to the forwarding state. If the forward delay is 15 seconds, the port will take 30 seconds to forward packets. However, when Fast STP is Enabled on a port, the port will only take 15 seconds from link-up to the time it starts forwarding packets. This is because enabling the Fast STP option will skip the learning state, jumping directly to the forwarding state from the listening state. Cost (1200000000) 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. Priority (0-240) A Port Priority can be from 0 to 255. The lower the number, the greater the probability the port will be chosen as the Root Port. Edge 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 Select True, False, or Auto. 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. The Auto setting instructs the switch to force a connection to a non-P2P port when it detects 1 or more BPDUs. Migrate 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 Configure Ports A consecutive group of ports may be configured starting with the selected port. from 1 to To configure Spanning Tree Protocol functions for individual ports, enter the desired information in the fields on this window (see the descriptions below for assistance) and then click Apply. 63

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DES-3226L Layer 2
Fast Ethernet Switch User’s Guide
The STP port settings that can be configured are:
Parameter
Description
Port
Number of port being configured.
State
Toggle between
Enabled
and
Disabled
. When STP is enabled, a change from
link-down to link-up will trigger the Spanning Tree Protocol. STP will set the port to
the listening state. After the forward delay, STP will set the port to the learning
state. After another forward delay, STP will set the port to the forwarding state. If
the forward delay is 15 seconds, the port will take 30 seconds to forward packets.
However, when Fast STP is
Enabled
on a port, the port will only take 15 seconds
from link-up to the time it starts forwarding packets. This is because enabling the
Fast STP option will skip the learning state, jumping directly to the forwarding
state from the listening state.
Cost (1-
200000000)
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.
Priority
(0-240)
A Port Priority can be from
0
to
255
. The lower the number, the greater the
probability the port will be chosen as the Root Port.
Edge
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
Select
True
,
False,
or
Auto
. 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. The
Auto
setting instructs the switch to
force a connection to a non-P2P port when it detects 1 or more BPDUs.
Migrate
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
Configure Ports
from 1 to
A consecutive group of ports may be configured starting with the selected port.
To configure
Spanning Tree Protocol
functions for individual ports, enter the desired
information in the fields on this window (see the descriptions below for assistance) and then
click
Apply
.
63