ZyXEL Communications MES3500-24 User Manual

Chapter 13 Spanning Tree Protocol

MES3500-24/24F User’s Guide

Click Advanced Application > Spanning Tree Protocol in the navigation panel to display the 
status screen as shown next. See 

 for more information on RSTP.

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

Advanced Application > Spanning Tree Protocol > Status: RSTP 

The following table describes the labels in this screen. 

Path Cost 

Path cost is the cost of transmitting a frame on to a LAN through that port. It is 
recommended to assign this value according to the speed of the bridge. The slower the 
media, the higher the cost - see 

 for more information.

Apply

Click Apply to save your changes to the Switch’s run-time memory. The Switch loses 
these changes if it is turned off or loses power, so use the Save link on the top navigation 
panel to save your changes to the non-volatile memory when you are done configuring.

Cancel

Click Cancel to begin configuring this screen afresh.

Advanced Application > Spanning Tree Protocol > RSTP  (continued)

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.