• For Transmit, enter the keyword out.
events (OPTIONAL) Enter the keyword events to debug MSTP events.
Command Modes EXEC Privilege
Command History
Version 8.3.11.1 Introduced on the Z9000.
Version 8.5.1.0 Added support for 4-port 40G line cards on ExaScale.
Version 8.3.7.0 Introduced on the S4810.
Version 7.6.1.0 Introduced on the S-Series.
Version 7.5.1.0 Introduced on the C-Series.
pre-Version 
6.2.1.1
Introduced on the E-Series.
Example
FTOS#debug spanning-tree mstp bpdu gigabitethernet 2/0 ?
in Receive (in)
out Transmit (out)
description
Enter a description of the multiple spanning tree.
C-Series, E-Series, S-Series, Z-Series, S4810
Syntax
description {description}
To remove the description, use the no description {description} command.
Parameters
description
Enter a description to identify the multiple spanning tree (maximum 80 
characters).
Defaults none
Command Modes SPANNING TREE (The prompt is “config-mstp”.)
Command History
Version 8.3.11.1 Introduced on the Z9000.
pre-7.7.1.0 Introduced
Related 
Commands
protocol spanning-tree mstp – enters MULTIPLE SPANNING TREE mode on the switch.
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