ZyXEL Communications 4528F User Manual

 Chapter 13 Spanning Tree Protocol

XGS-4526/4528F/4728F User’s Guide

Note: This screen is only available after you activate RSTP on the Switch. 

Figure 64   Advanced Application > Spanning Tree Protocol > Status: RSTP 

The following table describes the labels in this screen. 

Table 30   Advanced Application > Spanning Tree Protocol > Status: RSTP 

Configuration

Click Configuration to specify which STP mode you want to activate. 
Click RSTP to edit RSTP settings on the Switch. 

Bridge

Root refers to the base of the spanning tree (the root bridge). Our 
Bridge is this Switch. This Switch may also be the root bridge.

Bridge ID  

This is the unique identifier for this bridge, consisting of the bridge 
priority plus the MAC address. This ID is the same for Root and Our 
Bridge if the Switch is the root switch. 

Hello Time 
(second)

This is the time interval (in seconds) at which the root switch transmits 
a configuration message. The root bridge determines Hello Time, Max 
Age and Forwarding Delay.

Max Age 
(second)

This is the maximum time (in seconds) a switch can wait without 
receiving a configuration message before attempting to reconfigure.

Forwarding 
Delay (second)

This is the time (in seconds) the root switch will wait before changing 
states (that is, listening to learning to forwarding). See 

 for information on port states.

Note: The listening state does not exist in RSTP.

Cost to Bridge

This is the path cost from the root port on this Switch to the root 
switch. 

Port ID 

This is the priority and number of the port on the Switch through which 
this Switch must communicate with the root of the Spanning Tree.

Topology 
Changed Times

This is the number of times the spanning tree has been reconfigured.

Time Since Last 
Change

This is the time since the spanning tree was last reconfigured.