H3C Technologies H3C S5560 Series Switches - Manual (Page 138)

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Step Command Remarks
3. Enable BPDU drop on the
current interface.
bpdu-drop any By default, BPDU drop is disabled.
Displaying and maintaining the spanning tree
Execute display commands in any view and reset command in user view.
Task Command
Display information about ports blocked by spanning tree
protection functions.
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 functions.
display stp down-port
Display the historical information of port role calculation
for the specified MSTI or all MSTIs. display stp [ instance instance-list | vlan
vlan-id-list ] history [ slot slot-number ]
Display the statistics of TC/TCN BPDUs sent and received
by all ports in the specified MSTI or all MSTIs. display stp [ instance instance-list | vlan
vlan-id-list ] tc [ slot slot-number ]
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 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 example
MSTP configuration example
Network requirements
As shown in Figure 31 , 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 packets of different VLANs are forwarded along different spanning trees.
• VLAN 10 packets are forwarded along MSTI 1.
• VLAN 30 packets are forwarded along MSTI 3.
• VLAN 40 packets are forwarded along MSTI 4.
• VLAN 20 packets are forwarded along MSTI 0.