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5.2.3 STP Port States
STP assigns five port states (see next table) to eliminate packet looping. A bridge port is not
allowed to go directly from blocking state to forwarding state so as to eliminate transient
loops.
Table 15 STP Port States
PORT STATE
Disabled
Blocking
Listening
Learning
Forwarding
5.2.4 View STP Status
Follow the steps below to view the STP status of a switch.
1 Click Status and then STP Status.
2 Choose a switch from the list located on the left-hand side of the screen.
Figure 48 Status: STP Status
The following table describes the labels in this screen.
Table 16 Status: STP Status
LABEL
STP
Bridge
Bridge ID
Chapter 5 Status
DESCRIPTION
STP is disabled (default).
Only configuration and management BPDUs are received and processed.
All BPDUs are received and processed.
All BPDUs are received and processed. Information frames are submitted
to the learning process but not forwarded.
All BPDUs are received and processed. All information frames are
received and forwarded.
DESCRIPTION
This field displays Running if STP is activated; otherwise, it displays Unknown.
Root refers to the base of the spanning tree (the root bridge).
This is the unique identifier for this bridge, consisting of bridge priority plus MAC
address.
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