Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 495)

Spanning Tree Commands
Software Reference for x310 Series Switches
C613-50046-01 REV A AlliedWare Plus TM Operating System - Version 5.4.4C 19.5
debug mstp (RSTP and STP)
Use this command to enable debugging for the configured spanning tree mode, and echo
data to the console, at various levels. Note that although this command uses the keyword
mstp it displays debugging output for RSTP and STP protocols as well the MSTP protocol.
Use the no variant of this command to disable spanning tree debugging.
Syntax debug mstp {all|cli|protocol [detail]|timer [detail]}
debug mstp {packet {rx|tx} [decode] [interface <interface>]}
debug mstp {topology-change [interface <interface>]}
no debug mstp {all|cli|protocol [detail]|timer [detail]}
no debug mstp {packet {rx|tx} [decode] [interface <interface>]}
no debug mstp {topology-change [interface <interface>]}
Mode Privileged Exec and Global Configuration mode
Usage 1 Use the debug mstp topology-change interface command to generate debugging
messages when the switch receives an indication of a topology change in a BPDU from
another device. The debugging can be activated on a per-port basis. Although this
command uses the keyword mstp, it displays debugging output for RSTP and STP
protocols as well as the MSTP protocol.
Due to the likely volume of output, these debug messages are best viewed using the
terminal monitor command on page 8.66 before issuing the relevant debug mstp
command. The default terminal monitor filter will select and display these messages.
Alternatively, the messages can be directed to any of the other log outputs by adding a
filter for the MSTP application using
log buffered (filter) command on page 10.8 :
Parameter Description
all Echoes all spanning tree debugging levels to the console.
cli Echoes spanning tree commands to the console.
packet Echoes spanning tree packets to the console.
rx Received packets.
tx Transmitted packets.
protocol Echoes protocol changes to the console.
timer Echoes timer information to the console.
detail Detailed output.
decode Interprets packet contents
topology-change Interprets topology change messages
interface Keyword before <interface> placeholder to specify an
interface to debug
<interface> Placeholder used to specify the name of the interface to
debug.