Bridge Spanning Tree Parameters

The Spanning Tree window contains the information relevant to the spanning tree algorithm, from the dot1bridge group. This includes the following information:

Time Since Topology

Change

Number of seconds since last change of config.

Topology Changes

Number of config. changes.

Des. Root

Bridge ID of Designated root (in MAC address - like format)

Bridge Max Age

Aging time for all bridges when this bridge is acting as root.

Bridge Hello Time

Hello Time used by all bridges when this bridge is acting as root

Bridge Forward Delay

How long for a port to wait to change state when this bridge is root.

Root Port

Port with lowest cost path to root bridge.

Hello Time

Amount of time between config. requests when bridge is changing root state.

Hold Time

Amount of time between config requests by bridge.

Forward Delay

How long for a port to wait to change state.

Bridge Priority (hex)

Writeable portion of bridge ID.

 

All times are in hundredths of a second unless noted, and all values are in decimal unless otherwise stated.

In addition, the Enable Spanning Tree check-box allows you to turn on or off the Spanning Tree algorithm.

Upon enabling the Spanning Tree algorithm, the switch will be blind to all traffic for about 45 seconds to a minute as it sets up the port configurations. NMS will eventually come back on line.

NOTES:

· To disable Spanning Tree: Uncheck the Enable Spanning Tree check-box, close the System Information Window and reset the switch via the main menu.

· When Spanning Tree is disabled, you cannot change the other values. You must follow above steps to enable Spanning Tree before editing the writeable variables.