Enabling Outputting Port State Transition Information; Enabling The Spanning Tree Feature - HP 6125G Configuration Manual

MSTP provides MSTP packet format incompatibility guard. In MSTP mode, if a port is configured to
recognize/send MSTP packets in a mode other than auto, and if it receives a packet in a format different
from the specified type, the port becomes a designated port and remains in the discarding state to
prevent the occurrence of a loop.
MSTP provides MSTP packet format frequent change guard. If a port receives MSTP packets of different
formats frequently, the MSTP packet format configuration contains errors. If the port is operating in MSTP
mode, it will be shut down for protection. Ports disabled in this way can be re-activated after a detection
interval. For more information about the detection interval, see Fundamentals Configuration Guide.
To configure the MSTP packet format to be supported on a port:
Step
1. Enter system view.
2. Enter Layer 2 Ethernet
interface view or Layer 2
aggregate interface
view.
3. Configure the mode that
the port uses to
recognize/send MSTP
packets.

Enabling outputting port state transition information

In a large-scale spanning tree network, you can enable devices to output the port state transition
information of all MSTIs or the specified MSTI in order to monitor the port states in real time.
To enable outputting port state transition information:
Step
1. Enter system view.
2. Enable outputting port
state transition
information.

Enabling the spanning tree feature

You must enable the spanning tree feature for the device before any other spanning tree related
configurations can take effect.
Make sure that the spanning tree feature is enabled globally and on the desired ports.
You can disable the spanning tree feature for certain ports with the undo stp enable command to exclude
them from spanning tree calculation and save CPU resources of the device.
Command
system-view
interface interface-type interface-number
stp compliance { auto | dot1s | legacy }
Command
system-view
•
In STP/RSTP mode:
stp port-log instance 0
•
In MSTP mode:
stp port-log instance { instance-id | all }
77
Remarks
N/A
N/A
auto by default.
Remarks
N/A
Use one of the commands.
Enabled by default.