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24-port NWay Ethernet Switch User’s Guide

Web-Based Network Management 133

♦ Topology Change Count Displays the number of times (since

the current management session with the device was started)

changes were made to the network topology. Changes usually

occur on the network when backup paths are activated.

♦ MAC Address Displays the IP address of the root.

♦ Path Cost Displays the cost for the path between the Switch

and the root bridge. If the Switch is the root bridge, then the

path cost is zero.

♦ Port Displays the port (on the bridge) that offers the least path

cost from the bridge to the root bridge. In the event of a network

loop, data packets will pass through the root port.

♦ Priority Displays the priority number of the root bridge of the

Spanning Tree. The value is used in conjunction with the bridge

MAC address to set the bridge ID, which in turn is used in

determining the root bridge of a multi-bridged network. The root

bridge is responsible for processing data packets when network

loops occur. The smaller the number set, the higher the bridge

priority is. The higher the bridge priority, the more chances the

bridge has of becoming the root bridge. A bridge priority ranges

from 0 to 65535, with 0 being the highest priority.

♦ Switch Priority

♦ Hello Time Displays the interval between two transmissions of

BPDU packets sent by the root bridge to tell all other switches

that it is indeed the root bridge.

♦ Port

♦ Forward Delay Displays the time any port on the Switch

spends in the listening state while moving from the blocking

state to the forwarding state.

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