ZyXEL ES-3148 Guida Utente

Chapter 11 Spanning Tree Protocol

ES-3148 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 

MSTP. 

VLAN Range

Enter the start of the VLAN ID range that you want to add or remove from the 

VLAN range edit area in the Start field. Enter the end of the VLAN ID range that 

you want to add or remove from the VLAN range edit area in the End field. 
Next click:
•

Add - to add this range of VLAN(s) to be mapped to the MST instance. 

•

Remove - to remove this range of VLAN(s) from being mapped to the MST 

instance. 

•

Clear - to remove all VLAN(s) from being mapped to this MST instance. 

Enabled VLAN(s)

This field displays which VLAN(s) are mapped to this MST instance. 

Port

This field displays the port number. 

*

Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports. Use 

this row first to set the common settings and then make adjustments on a port-by-

port basis. 

Note: Changes in this row are copied to all the ports as soon as you 

make them.

Active

Select this check box to add this port to the MST instance. 

Priority

Configure the priority for each port here.
Priority decides which port should be disabled when more than one port forms a 

loop in the Switch. Ports with a higher priority numeric value are disabled first. The 

allowed range is between 0 and 255 and the default value is 128.

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.

Add

Click Add to save this MST instance to the Switch’s run-time memory. The Switch 

loses this change 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.

Instance

This field displays the ID of an MST instance. 

VLAN

This field displays the VID (or VID ranges) to which the MST instance is mapped. 

Active Port

This field display the ports configured to participate in the MST instance.

Delete

Check the rule(s) that you want to remove in the Delete column and then click the 

Delete button.

Cancel

Click Cancel to begin configuring this screen afresh.

Table 31   Advanced Application > Spanning Tree Protocol > MSTP  (continued)