ZyXEL Communications 4528F Manual De Usuario

 Chapter 13 Spanning Tree Protocol

XGS-4526/4528F/4728F User’s Guide

The following table describes the labels in this screen. 

Table 35   Advanced Application > Spanning Tree Protocol > Status: MSTP 

Configuration

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

CST

This section describes the Common Spanning Tree settings. 

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 bridge priority 
plus 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. 

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).

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.

Configuration 
Name

This field displays the configuration name for this MST region.

Revision 
Number

This field displays the revision number for this MST region. 

Configuration 
Digest

A configuration digest is generated from the VLAN-MSTI mapping 
information. 

This field displays the 16-octet signature that is included in an MSTP 
BPDU. This field displays the digest when MSTP is activated on the 
system. 

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.

Instance:

These fields display the MSTI to VLAN mapping. In other words, which 
VLANs run on each spanning tree instance.

Instance

This field displays the MSTI ID.

VLAN

This field displays which VLANs are mapped to an MSTI.

MSTI

Select the MST instance settings you want to view.

Bridge

Root refers to the base of the MST instance. 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 bridge priority 
plus MAC address. This ID is the same for Root and Our Bridge if the 
Switch is the root switch.