HP 5820X Series

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To do... Use the command... Remarks
3. Configure the mode the port uses to
recognize/send MSTP packets
stp compliance { auto | dot1s
| legacy }
Required.
auto by default.
MSTP provides the MSTP packet format incompatibility guard function. In MSTP mode, if a port is
configured to recognize/send MSTP packets in a mode other than auto, and receives a packet in a
format different from the specified type, the port will become a designated port and remain in the
discarding state to prevent the occurrence of a loop.
MSTP provides the MSTP packet format frequent change guard function. If a port receives MSTP packets
of different formats frequently, the MSTP packet format configuration can contain errors. If the port is
working in MSTP mode, it will be disabled for protection. The closed ports can be restored only by the
network administrators.
Enabling the output of port state transition information
A large-scale, MSTP-enabled network can have many MSTIs, and ports may frequently transition from one
state to another. In this situation, you can enable devices to output the port state transition information of
all MSTIs or the specified MSTI so as to monitor the port states in real time.
Make this configuration on the root bridge and on the leaf nodes separately.
To enable output of port state transition information:
To do... Use the command... Remarks
1. Enter system view
system-view —
2. Enable output of port state
transition information
stp port-log { all | instance
instance-id }
Required
Enabled by default
Enabling the MSTP feature
You must enable MSTP for the device before any other MSTP-related configurations can take effect.
Make this configuration on the root bridge and on the leaf nodes separately.
To enable the MSTP feature:
To do... Use the command... Remarks
1. Enter system view
system-view —
2. Enable the MSTP feature globally
stp enable
Required.
MSTP is globally disabled by
default.
Enter Ethernet
interface view or
Layer 2 aggregate
interface view
interface interface-type
interface-number
3. Enter
interface
view or port
group view
Enter port group
view
port-group manual port-group-
name
Required.
Use either command.