14.
Multiple Spanning Tree Protocol (MSTP)
MN700004 Rev 01
173
Example
device-name
#
debug mstp roles all
tSpanRecv: 1970/01/01 02:27:14 : link up on port 1/1/1
tMstPIM: 1970/01/01 02:27:14 :
MST Cist Select-Port-Roles
==========================
tMstPIM: 1970/01/01 02:27:14 : This bridge is the root
tMstPIM: 1970/01/01 02:27:14 : Port 1/1/1 Is DesignatedPort
tMstPIM: 1970/01/01 02:27:14 : Port 1/1/2 Is DesignatedPort
tMstPIM: 1970/01/01 02:27:14 :
End-Roles-Selection
Displaying the MSTP Debugging
The
show debug
mstp
command, in Privileged (Enable) mode, displays the status of the
debug actions in the Multiple Spanning Tree Protocol (MSTP) that are currently active in the
switch.
Command Syntax
device-name
#
show debug mstp
Example
device-name
#
show debug mstp
MSTP debugging status:
|MSTI |Dbg Role|Dbg Handshake|Dbg Flush
|0 |ON |ON |OFF |
Port debugging status:
|Port |Dbg RX|Dbg TX|Dbg Validation|Dbg Sanity|
|1/1/1 |OFF |ON |OFF |OFF |
|1/1/2 |OFF |ON |OFF |OFF |
|1/1/3 |OFF |ON |OFF |OFF |
|1/1/4 |OFF |ON |OFF |OFF |
|1/1/5 |OFF |ON |OFF |OFF |
Configuration Examples
Pending Configuration
The following example shows how to configure MSTP and display the temporary (pending)
configuration.
1. Enter into Protocol MSTP Configuration mode and map the VLANs ranging from 1 to 10
to MST instance 1:
device-name
#
configure terminal
device-name
(config)#
protocol