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158 Chapter 3 Using the console interface
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Table 35 describes the Spanning Tree Port Configuration screen fields.
Table 35 Spanning Tree Port Configuration screen fields
Field Description
Port Indicates the switch port numbers that correspond to the field values in that row of the
screen (for example, the field values in row 2 apply to switch port 2). Note that the values
in the
Switch
row affect all switch ports.
Trunk
The read-only data displayed in this column indicates the trunks that correspond to the
switch ports specified in the Trunk Members fields of the Trunk Configuration screen
(see “MultiLink Trunk Configuration Menu screen” on page 136).
Participation
Allows you to configure any (or all) of the switch ports for Spanning tree participation.
When an individual port is a trunk member (see Trunk field), changing this setting for one
of the trunk members changes the setting for all members of that trunk. You should
consider how this can change your network topology before you change this setting.
The Fast Learning parameter is the same as Normal Learning, except that the state
transition timer is shortened to 2 seconds.
Default Value Normal Learning
Range Normal Learning, Fast Learning, Disabled
Priority This read-only field is a bridge spanning tree parameter that prioritizes the port’s lowest
path cost to the root. When one or more ports have the same path cost, the STA selects
the path with the highest priority (lowest numerical value). See also Path Cost.
Default Value 128
Range 0 to 255
Path Cost
This read-only field is a bridge spanning tree parameter that determines the lowest path
cost to the root.
Default Value 10 or 100 (1 for Gigabit port)
Path Cost = 1000/LAN speed (in Mb/s)
The higher the LAN speed, the lower the path cost.
See also Priority.
Range 1 to 65535
State This read-only field indicates the current port state within the spanning tree network.
Each port can transition to various states, as determined by the Participation field setting.
For example, when the Participation field is set to Disabled, the port does not participate
in the STA and transitions to the Forwarding state (the default). When the Participation
field is set to Enabled, the port transitions from the Disabled state through the Blocking,
Listening, and Learning states before entering the Forwarding state.
Default Value Topology dependent
Range Disabled, Blocking, Listening, Learning, Forwarding