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•
Port State — Displays the current STP state of a port. If enabled, the port state determines
what forwarding action is taken on traffic. Possible port states are:
–
Disabled — Indicates that STP is currently disabled on the port. The port forwards traffic
while learning MAC addresses.
–
Blocking — Indicates that the port is currently blocked and cannot forward traffic or
learn MAC addresses.
–
Listening — Indicates that the port is in Listening mode. The port cannot forward traffic
nor can it learn MAC addresses.
–
Learning — Indicates that the port is in Learning mode. The port cannot forward traffic,
however it can learn new MAC addresses.
–
Forwarding — Indicates that the port is in Forwarding mode. The port can forward
traffic and learn new MAC addresses.
•
Speed — Indicates the speed at which the port is operating.
•
Path Cost — Defines the port contribution to the root path cost. The path cost is adjusted to a
higher or lower value, and is used to forward traffic when a path being rerouted.
•
Default Path Cost — Defines the default path cost as the Path Cost field setting.
•
Priority — Priority value of the port. The priority value influences the port choice when a
bridge has two ports connected in a loop. The priority value is between 0 -240. The priority
value is provided in increments of 16.
•
Designated Bridge ID — Indicates the bridge priority and the MAC Address of the
designated bridge.
•
Designated Port ID — Indicates the selected port's priority and interface.
•
Designated Cost — Indicates the cost of the port participating in the STP topology. Ports with
a lower cost are less likely to be blocked if STP detects loops.
•
Forward Transitions — Indicates the number of times the port has changed from the
Blocking state to Forwarding state.
•
LAG — Indicates the LAG to which the port belongs. If a port is a member of a LAG, the
LAG settings override the port settings.
Chapter 11: Configuring Spanning Tree
Defining Interface Settings
SFE1000P Gigabit Ethernet Switch Administration Guide
Chapter
11
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