Specifications

Configuring the Switch
2-80
2
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. (References to “ports” in this
section means “interfaces,” which includes both ports and trunks.)
Command Attributes
The following attributes are read-only and cannot be changed:
• Port – Ports only; i.e., no trunks or trunk port members.
• STA State – Displays current state of this port within the Spanning Tree:
- 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.
- Forwarding - Port forwards packets, and continues learning addresses.
• Trunk – Indicates if a port is a member of a trunk.
(STA Port Configuration only)
The following interface attributes can be configured:
• Priority – Defines the priority used for this port in the Spanning Tree Protocol. If
the path cost for all ports on a switch are the same, the port with the highest priority
(i.e., lowest value) will be configured as an active link in the Spanning Tree. This
makes a port with higher priority less likely to be blocked if the Spanning Tree
Protocol is detecting network loops. Where more than one port is assigned the
highest priority, the port with lowest numeric identifier will be enabled.
- Default: 128
- Range: 0-240, in steps of 16
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Eth 1/ 1 information
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Admin status : enable
Role : disable
State : discarding
Path cost : 100000
Priority : 128
Designated cost : 0
Designated port : 128.1
Designated root : 32768.00A0CA445566
Designated bridge : 32768.00A0CA445566
Forward transitions : 0
Fast forwarding : disable
Admin edge port : disable
Oper edge port : disable
Admin Link type : auto
Oper Link type : point-to-point
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