Troubleshooting an MSTP configuration
This section describes the show spanning-tree commands to use to monitor, troubleshoot, and debug the operation
of a multiple-instance spanning tree configuration in a network.
The
show spanning-tree commands
described in this section allow for focusing on increasingly specific
levels of operation. For example, you can display debug information
for: All MST instances
All ports used in one MST instance
A specific port or several ports used in one MST instance
Also, you can display the change history for
the root (bridge) switch used as the single forwarding path for:
All MST regions, STP bridges, and RSTP bridges in an STP network
All VLANs on MSTP switches in a region
All VLANs on MSTP switches in an mst instance