Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 496)

Spanning Tree Commands
Software Reference for x310 Series Switches
19.6 AlliedWare Plus TM Operating System - Version 5.4.4C C613-50046-01 REV A
:
Output 1
Usage 2 Use the debug mstp packet rx|tx decode interface command to generate debugging
messages containing the entire contents of a BPDU displayed in readable text for
transmitted and received xSTP BPDUs. The debugging can be activated on a per-port basis
and transmit and receive debugging is controlled independently. 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 the
log buffered (filter) command on page 10.8 :
Output 2 In MSTP mode - an MSTP BPDU with 1 MSTI:
awplus# configure terminal
awplus(config)# log buffered program mstp
awplus#terminal monitor
awplus#debug mstp topology-change interface port1.0.4
10:09:09 awplus MSTP[1409]: Topology change rcvd on port1.0.4 (internal)
10:09:09 awplus MSTP[1409]: Topology change rcvd on MSTI 1 port1.0.4
aawplus#debug mstp topology-change interface port1.0.6
10:09:29 awplus MSTP[1409]: Topology change rcvd on port1.0.6 (external)
10:09:29 awplus MSTP[1409]: Topology change rcvd on MSTI 1 port1.0.6
awplus(config)# log buffered program mstp
awplus#terminal monitor
awplus#debug mstp packet rx decode interface port1.0.4
17:23:42 awplus MSTP[1417]: port1.0.4 xSTP BPDU rx - start
17:23:42 awplus MSTP[1417]: Protocol version: MSTP, BPDU type: RST
17:23:42 awplus MSTP[1417]: CIST Flags: Agree Forward Learn role=Desig
17:23:42 awplus MSTP[1417]: CIST root id : 0000:0000cd1000fe
17:23:42 awplus MSTP[1417]: CIST ext pathcost : 0
17:23:42 awplus MSTP[1417]: CIST reg root id : 0000:0000cd1000fe
17:23:42 awplus MSTP[1417]: CIST port id : 8001 (128:1)
17:23:42 awplus MSTP[1417]: msg age: 0 max age: 20 hellotime: 2 fwd delay: 15
17:23:42 awplus MSTP[1417]: Version 3 length : 80
17:23:42 awplus MSTP[1417]: Format id : 0
17:23:42 awplus MSTP[1417]: Config name : test
17:23:42 awplus MSTP[1417]: Revision level : 0
17:23:42 awplus MSTP[1417]: Config digest : 3ab68794d602fdf43b21c0b37ac3bca8
17:23:42 awplus MSTP[1417]: CIST int pathcost : 0
17:23:42 awplus MSTP[1417]: CIST bridge id : 0000:0000cd1000fe
17:23:42 awplus MSTP[1417]: CIST hops remaining : 20
17:23:42 awplus MSTP[1417]: MSTI flags : Agree Forward Learn role=Desig
17:23:42 awplus MSTP[1417]: MSTI reg root id : 8001:0000cd1000fe
17:23:42 awplus MSTP[1417]: MSTI pathcost : 0
17:23:42 awplus MSTP[1417]: MSTI bridge priority : 32768 port priority : 128
17:23:42 awplus MSTP[1417]: MSTI hops remaining : 20
17:23:42 awplus MSTP[1417]: port1.0.4 xSTP BPDU rx - finish