Parameter

Default

Description

Type

 

Shows port type as:

 

 

100TX : 10BASE-T / 100BASE-TX

 

 

1000T : 1000BASE-T

 

 

1000FX: 1000Base-SX or 1000Base-LX

Priority

128

Defines the priority for the use of a port in the STA algorithm. If the path

 

 

cost for all ports on a switch are the same, the port with the highest

 

 

priority (that is, lowest value) will be configured as an active link in the

 

 

Spanning Tree. Where more than one port is assigned the highest

 

 

priority, the port with lowest numeric identifier will be enabled. The range

 

 

is 0 - 255.

(Path) Cost

100/19/4

This parameter is used by the STA algorithm to determine the best path

 

 

between devices. Therefore, lower values should be assigned to ports

 

 

attached to faster media, and higher values assigned to ports with

 

 

slower media. (Path cost takes precedence over port priority.)

 

 

The default and recommended range is:

 

 

Ethernet: 100 (50~600)

 

 

Fast Ethernet: 19 (10~60)

 

 

Gigabit Ethernet: 4 (3~10)

 

 

The full range is 0 - 65535.

Fast

Disabled

This parameter is used to enable/disabled the Fast Spanning Tree mode

Forwarding

 

for the selected port. In this mode, ports skip the Blocked, Listening and

 

 

Learning states and proceed straight to Forwarding.

 

 

 

NOTE: Since end-nodes cannot cause forwarding loops, they can pass through the Spanning Tree state changes more quickly than allowed by standard convergence time. Fast Forwarding can achieve quicker convergence for end-node workstations and servers, and also overcome other STA related time-out problems. (Remember that Fast Forwarding should only be enabled for ports connected to an end-node device.)

WGS3 Layer 3 Switch User’s Manual

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