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Display and maintenance commands for the
spanning tree protocols
Execute display commands in any view and reset command in user view.
Task Command
Display the spanning tree status
and statistics.
display stp
[
instance
instance-list
|
vlan
vlan-id-list
]
[
interface
interface-list
|
slot
slot-number
] [
brief
]
Display the port role calculation
history for the specified MSTI or all
MSTIs.
display stp
[
instance
instance-list
|
vlan
vlan-id-list
]
history
[
slot
slot-number ]
Display the incoming and outgoing
TC/TCN BPDU statistics by all
ports in the specified MSTI or all
MSTIs.
display stp
[
instance
instance-list
|
vlan
vlan-id-list
]
tc
[
slot
slot-number ]
Display history about ports
blocked by spanning tree
protection features.
display stp abnormal-port
Display BPDU statistics on ports.
display stp bpdu-statistics
[
interface
interface-type interface-number
[
instance
instance-list
]
]
Display information about ports
shut down by spanning tree
protection features.
display stp down-port
Display the MST region
configuration information that has
taken effect.
display stp region-configuration
Display the root bridge information
of all MSTIs.
display stp root
Clear the spanning tree statistics.
reset stp
[
interface
interface-list
]
Spanning tree configuration examples
Example: Configuring MSTP
Network configuration
As shown in Figure 22, all devices on the network are in the same MST region. Device A and Device
B work at the distribution layer. Device C and Device D work at the access layer.
Configure MSTP so that frames of different VLANs are forwarded along different spanning trees.
• VLAN 10 frames are forwarded along MSTI 1.
• VLAN 30 frames are forwarded along MSTI 3.
• VLAN 40 frames are forwarded along MSTI 4.
• VLAN 20 frames are forwarded along MSTI 0.
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