Reference Guide

MST commands
debug spanning-tree
Enables STP debug and displays protocol information.
Syntax
debug spanning-tree {all | bpdu [tx | rx] | events}
Parameters
• all — Debugs all spanning tree operations.
• bpdu — Enter transmit (tx) or receive (rx) to enable the debug direction.
• events — Debugs PVST events.
Default Not congured
Command Mode EXEC
Usage Information None
Example
OS10# debug spanning-tree bpdu rx
Supported Releases 10.2.0E or later
spanning-tree mst forward-time
Congures a time interval for the interface to wait in the Blocking state or the Learning state before moving to the Forwarding state.
Syntax
spanning-tree mst forward-time seconds
Parameters seconds — Enter the number of seconds an interface waits in the Blocking or Learning States before moving to
the Forwarding state (4 to 30).
Default 15 seconds
Command Mode CONFIGURATION
Usage Information The no version of this command resets the value to the default.
Example
OS10(config)# spanning-tree mst forward-time 16
Supported Releases 10.2.0E or later
spanning-tree mst hello-time
Sets the time interval between generation and transmission of MSTP BPDUs.
Syntax
spanning-tree mst hello-time seconds
Parameters seconds — Enter a hello-time interval value in seconds (1 to 10).
Default 2 seconds
Command Mode CONFIGURATION
146 Layer 2