Chapter 11 Spanning Tree Protocol

Table 26 Advanced Application > Spanning Tree Protocol > Status: MSTP (continued)

LABEL

DESCRIPTION

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

This field displays the configuration name for this MST region.

Name

 

 

 

Revision Number

This field displays the revision number for this MST region.

 

 

Configuration

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

Digest

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

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

Changed Times

 

 

 

Time Since Last

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

Change

 

 

 

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.

 

 

Internal Cost

This is the path cost from the root port in this MST instance to the regional 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 MST instance.

 

 

 

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