24-Port Layer 3 Switch Management Guide

S PANNING T REE A LGORITHM C ONFIGURATION
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CLI – This example shows the STA attributes for port 5.
Configuring Interface Settings
You can configure RSTP attributes for specific interfaces, including port
priority, path cost, link type, and edge port. You may use a different
priority or path cost for ports of the same media type to indicate the
preferred path, link type to indicate a point-to-point connection or
shared-media connection, and edge port to indicate if the attached device
can support fast forwarding.
Command Attributes
The following attributes are read-only and cannot be changed:
• STA State – Displays current state of this port within the Spanning Tree.
(See Displaying Interface Settings on page 3-95 for additional
information.)
- Discarding - Port receives STA configuration messages, but does not
forward packets.
- Learning - Port has transmitted configuration messages for an interval
set by the Forward Delay parameter without receiving contradictory
information. Port address table is cleared, and the port begins learning
addresses.
Console#show spanning-tree ethernet 1/5 4-160
Eth 1/ 1 information
------------------------------------------
Admin status : enable
Role : designate
State : forwarding
Path cost : 100000
Priority : 128
Designated cost : 0
Designated port : 128.1
Designated root : 32768.0000ABCD0000
Designated bridge : 32768.0000ABCD0000
Forward transitions : 2
Fast forwarding : disable
Admin edge port : disable
Oper edge port : disable
Admin Link type : auto
Oper Link type : point-to-point
Console#