User`s guide

FORMULA 8200 User’s Guide

5-49

Table 5-19 deﬁnes the ﬁelds in the display.

Table 5-19

Spanning Tree Parameters by the VBRIDGE/SHOW/BRIDGE Command

Parameter Description

Spanning Tree Status Indicates whether Spanning Tree is enabled for this VLAN

Priority Bridge priority is used by the Bridge ID to determine which bridge will be

the root bridge. The Bridge ID consists of this bridge priority concatenated

with a 6-byte MAC address. You can set the bridge priority by entering a

decimal number from 0 to 65,535. Zero is the highest priority.

Bridge ID The bridge identiﬁcation number

Designated Root The root bridge as determined by the Spanning Tree Protocol

Cost to Root Bridge The path cost to the root bridge from this bridge

Root Port The port ID of the port that offers the lowest cost path to the root

Hold Time The interval length (in seconds) during which no more than two

conﬁguration BPDUs shall be transmitted

Topology Changes The total number of topology changes detected by this bridge since the

counter was last reset or initialized

Last Topology Change The amount of time since the last topology change was detected

Bridge Aging Timer The timeout period in seconds for aging out dynamically learned

forwarding information

Local and Global Parameters

Max Age The maximum age (in seconds) of information learned on any port before

being discarded

Forward Delay This time value (in seconds) controls how fast a port changes when

moving towards the Forwarding state. The value determines how long the

port stays in each of the Listening and Learning states, which precede the

Forwarding state. This value is also used, when a topology change has

been detected and is underway, to age out all dynamic entries in the

Forwarding Database.

Hello Time The time interval between the transmission of Conﬁguration BPDUs by a

bridge that is attempting to become the root or is the root