HP ProCurve Switch 6120G/XG Management Manual page 159

Multiple Instance Spanning-Tree Operation
Troubleshooting an MSTP Configuration
ProCurve(config)# show spanning-tree root-history cst
Status and Counters - CST Root Changes History
MST Instance ID
Root Changes Counter
Current Root Bridge ID : 32768:000883-024500
Root Bridge ID
------------------- -------- --------
32768:000883-024500 02/09/07 17:40:59
36864:001279-886300 02/09/07 17:40:22
Figure 4-22. Example of show spanning-tree root-history cst Command Output
ProCurve(config)# show spanning-tree root-history ist
Status and Counters - IST Regional Root Changes History
MST Instance ID
Root Changes Counter
Current Root Bridge ID : 32768:000883-024500
Root Bridge ID
------------------- -------- --------
32768:000883-024500 02/09/07 17:40:59
36864:001279-886300 02/09/07 17:40:22
Figure 4-23. Example of show spanning-tree root-history ist Command Output
ProCurve(config)# show spanning-tree root-history mst 2
Status and Counters - MST Instance Regional Root Changes History
MST Instance ID
Root Changes Counter
Current Root Bridge ID : 32770:000883-024500
Root Bridge ID
------------------- -------- --------
32770:000883-024500 02/09/07 17:40:59
32770:001279-886300 02/09/07 17:40:22
Figure 4-24. Example of show spanning-tree root-history msti Command Output
4-60
: 0
: 2
Date Time
: 0
: 2
Date Time
: 2
: 2
Date Time
Identifies the root bridge of the common
spanning tree in a bridged network that
connects different MST regions and STP
or RSTP devices.
Identifies the root bridge of the internal
spanning tree in an MST region.
Identifies the root bridge of an MST
instance in an MST region.