Alcatel Carrier Internetworking Solutions Switch/Router ユーザーズマニュアル

Page 17-37

 The port’s current role as defined by application of the fast spanning tree protocol. The 

values include:

The port has been disabled.

The Root Port on a Bridge has the best path to the Root Bridge, and 
connects the Bridge to the Root Bridge.

The Designated Port on a Bridge provides an attached 

LAN

 the best path 

to the Root Bridge, and connects the 

LAN

 through the Bridge to the Root 

Bridge, forwarding frames between them. (A Designated Port can be in a 
Listening, Learning, Forwards, Forwarder, or Forwarding state.)

The Alternate Port is connected to a 

LAN

 with another bridge 

functioning as the Designated Bridge. (An Alternate Port may be in either 
a Forgetting state or a Blocking state.)

The Backup Port is connected to a 

LAN

 with another port on the same 

Bridge functioning as the Designated Port. (Backup Ports are always in a 
Blocking state.) 

 This counter records each instance when the port is in the Forwards state.

 This counter records each instance when the port is in the Forwarder state.

 This counter records each instance when the port is in the Forgetting state.

This counter records each instance when the Root Port is retired.

 This counter records each instance when the Primary Port is retired.

 This counter records each instance when the port is linked up.

 The slot and interface (port) number of the Primary Port.

 The service type and instance of the service connected to the

Primary Port.