states, which precede the Forwarding state. This value is also used, when a topology change has been detected and is underway, to age all dynamic entries in the Forwarding Database.

STA Port Configuration

Parameters

Description

 

 

Port

Port number of the port

 

 

Priority

The value of the priority field which is contained in the first

 

(in network byte order) octet of the (2 octet long) Port ID.

 

 

Path Cost

The contribution of this port to the path cost of paths

 

towards the spanning tree root, which include this port.

 

802.1D-1990 recommends that the default value of this

 

parameter be in inverse proportion to the speed of the

 

attached LAN.

 

 

Fast Forward

The device omits from the 4 steps

 

(Blocking-Listening-Learning-Forwarding) to 3 steps

 

(Blocking-Listening-Forwarding) for speeding up specified

 

port to be running when STA topology has been changed.

 

 

4.13 Priority

This switch supports IEEE802.1p CoS with 2-level priority. There are 8 traffic classes and 8 Service Rules in the Priority Map. When one packet carries with priority-tag, which has specified a CoS (Class of Service) comes into the switch, the specified CoS tag will determine what priority (Low/High) will it get according to the Priority Map in the switch. The available Service Rules are:

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