Ethernet Switch User's Guide

310 Configuring Switching Information
Bridge Settings
• Priority — Specifies the bridge priority value. When switches or bridges are running STP, each are
assigned a priority. After exchanging BPDUs, the switch with the lowest priority value becomes the
root bridge. Valid values are from 0–61440. The default value is 32768.
•
Max Age — Specifies the switch maximum age time, which indicates the amount of time in seconds a
bridge waits before implementing a topological change. Valid values are from 6 to 40 seconds. The
default value is 20 seconds.
•
Forward Delay — Specifies the switch forward delay time, which indicates the amount of time in
seconds a bridge remains in a listening and learning state before forwarding packets. Valid values are
from 4 to 30 seconds.The default value is 15 seconds.
•
Maximum Hops — Configure the maximum number of hops for the spanning tree. Valid values are
from 6 to 40. The default value is 20.
•
Spanning Tree Tx Hold Count — Configure the Bridge Tx Hold Count parameter for the spanning
tree. Valid values are from 1 to 10 seconds. The default value is 6 seconds.
Designated Root Status
• Bridge ID — Displays the bridge ID.
•
Root Bridge ID — Specifies the root bridge ID.
•
Root Port — Displays port number that offers the lowest-cost path from this bridge to the root bridge.
It is significant when the bridge is not the root. The default is zero.
•
Root Path Cost — Displays the cost of the path from this bridge to the root.
•
Topology Changes Counts — Displays the total amount of STP state changes that have occurred.
•
Last Topology Change — Displays the total amount of time since the last topographic change. The
time is displayed in day/hour/minute/second format, for example, 5 hours 10 minutes and 4 seconds.
STP Port Settings
Use the STP Port Settings page to assign STP properties to individual ports.
To display the STP Port Settings page, click Switching > Spanning Tree > STP Port Settings in the tree
view.