Reference Guide

938 | Multiple Spanning Tree Protocol (MSTP)
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debug spanning-tree mstp
c e s
Enable debugging of Multiple Spanning Tree Protocol and view information on the protocol.
Syntax
debug spanning-tree mstp [all | bpdu interface {in | out} | events]
To disable debugging, enter no debug spanning-tree mstp.
Parameters
Command Modes
EXEC Privilege
Command
History
Example
Figure 34-1. debug spanning-tree mstp bpdu Command Example
all
(OPTIONAL) Enter the keyword all to debug all spanning tree operations.
bpdu interface
{in | out}
(OPTIONAL) Enter the keyword
bpdu to debug Bridge Protocol Data Units.
(OPTIONAL) Enter the interface keyword along with the type slot/port of the
interface you want displayed. Type slot/port options are the following:
• For a Fast Ethernet interface, enter the keyword
FastEthernet followed by the
slot/port information.
• For a 1-Gigabit Ethernet interface, enter the keyword
GigabitEthernet
followed by the slot/port information.
• For a Port Channel interface, enter the keyword
port-channel followed by a
number:
C-Series and S-Series Range: 1-128
E-Series Range: 1 to 32 for EtherScale, 1 to 255 for TeraScale and 1 to 512 for
ExaScale.
• For a SONET interface, enter the keyword
sonet followed by the slot/port
information.
• For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet
followed by the slot/port information.
Optionally, enter an in or out parameter in conjunction with the optional interface:
• For Receive, enter
in
• For Transmit, enter out
events (OPTIONAL) Enter the keyword events to debug MSTP events.
Version 7.6.1.0 Added support for S-Series
Version 7.5.1.0 Added support for C-Series
pre-Version 6.2.1.1 Introduced on E-Series
FTOS#debug spanning-tree mstp bpdu gigabitethernet 2/0 ?
in Receive (in)
out Transmit (out)