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5-20 C
HAPTER
5: A
DVANCED
M
ANAGEMENT
Configuring the STP Parameters of Ports
The Port STP screen allows you to set up and
manage the STP parameters of each port on the
Switch. To access the Port STP screen:
1
From the Main Menu, select SWITCH MANAGE-
MENT. The Switch Management screen is displayed.
2
In the Management Level field, choose Port.
3
In the Port ID field, enter the ID of the port to be
configured.
4
Choose the STP button. The Port STP screen is dis-
played, as shown in Figure 5-17
.
The screen shows the following:
Port ID
1 / 2 / 3 / ... 24 / 25 / 26 (3C16900A)
1 / 2 / 3 / ... 12 / 13 / 14 (3C16901A)
This read-only field shows the ID of the port to be
configured.
STP State
Disabled / Listening / Blocking / Learning
/ Forwarding
This read-only field shows the current
state of the port:
■
Disabled
— A port in this state does not forward
packets, and does not participate in STP opera-
tion.
■
Listening
— A port in this state is preparing to
forward packets, but has temporarily blocked to
prevent a loop. During the Listening state,
BPDUs are transmitted, received and processed.
Figure 5-17
Port STP screen
■
Blocking
— A port in this state does not forward
packets to prevent more than one active path
existing on the network. The port is included in
STP calculations, and BPDUs can be transmitted,
received and processed.
■
Learning
— A port in this state is preparing to
forward packets, but has temporarily blocked to
prevent a loop. During the Learning state, the
Switch learns the addresses of all error-free pack-
ets. The port is included in STP calculations, and
BPDUs can be transmitted, received and pro-
cessed.
■
Forwarding
— A port in this state can forward
packets. BPDUs can also be received and pro-
cessed.
Designated Port
This read-only field shows the ID
of the Designated Bridge Port for the current port’s
segment.