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Tracing Spanning-Tree Operations

1. Enable configuration of the spanning-tree protocol whose operations are to be traced:
   [edit]
user@host# edit ... protocols (mstp | rstp | vstp)
2. Enable configuration of spanning-tree protocol-specific trace options:
   [edit ... protocols (mstp | rstp | vstp)]
user@host# edit traceoptions
3. Configure the files that contain trace logging information:
   [edit ... protocols (mstp | rstp | vstp)]
user@host# set file filename <files number> <size bytes> <world-readable | no-world-readable>

4. Configure spanning-tree protocol-specific options.

   1. To enable a spanning-tree protocol-specific option, include the flag statement:
      [edit ... protocols (mstp | rstp | vstp)]
user@host# set flag flag <flag-modifier> <disable>

      
      You can specify the following spanning-tree protocol-specific flag options:

      • all—Trace all operations.
      • all-failures—Trace all failure conditions.
      • bpdu—Trace BPDU reception and transmission.
      • bridge-detection-state-machine—Trace the bridge detection state machine.
      • events—Trace events of the protocol state machine.
      • port-information-state-machine—Trace the port information state machine.
      • port-migration-state-machine—Trace the port migration state machine.
      • port-receive-state-machine—Trace the port receive state machine.
      • port-role-transit-state-machine—Trace the port role transit state machine.
      • port-role-select-state-machine—Trace the port role selection state machine.
      • port-transmit-state-machine—Trace the port transmit state machine.
      • port-state-transit-state-machine—Trace the port state transit state machine.
      • ppmd—Trace the state and events for the ppmd process.
      • state-machine-variables—Trace when the state machine variables change.
      • timers—Trace protocol timers.
      • topology-change-state-machine—Trace the topology change state machine.

      Note: Use the trace flag all with caution. This flag may cause the CPU to become very busy.

   2. To disable an individual spanning-tree protocol-specific option, include the disable option with the flag statement.

5. Verify the spanning-tree protocol-specific trace options.

   [edit]

   ...routing-options {traceoptions {...global-trace-options-configuration...}}}protocols {(mstp | rstp | vstp) {traceoptions { # Spanning-tree protocol-specific.file filename <files number> <size bytes> <world-readable | no-world-readable>;flag flag <flag-modifier> <disable>;}}}...