Command Manual – STP 
Quidway S8500 Series Routing Switches  Chapter 1  
MSTP Configuration Commands
 
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1-4 
Use the undo debugging stp instance instance-id command to disable specified 
instance debugging of MTSP. 
Use the debugging stp lacp-key command to  enable MD5 summary information 
debugging of LACP protocol. 
Use the undo debugging stp lacp-key command to disable MD5 summary 
information debugging of LACP protocol. 
Use the debugging stp tc-protection command to enable TC protection debugging. 
Use the undo debugging stp tc-protection command to disable TC protection 
debugging. 
Use the debugging stp interface interface-type interface-number { lacp-key | packet 
| event } command to enable specified port debugging of MSTP. 
Use the undo debugging stp interface interface-type interface-number { lacp-key | 
packet | event } command to disable specified port debugging of MSTP. 
Example 
# Enable STP global event debugging. 
<Quidway> debugging stp global-event 
1.1.4  display stp 
Syntax 
display stp [ instance instance-id ] [ interface interface-list | slot slot-num ] [ brief ] 
View 
Any view 
Parameter 
instance-id: Specifies the spanning tree instance ID, ranging from 0 to 48. Instance 0 
represents CIST.  
interface-list: Ethernet port list, containing multiple Ethernet ports and expressed as 
interface-list = { { interface-type interface-num | interface-name } [ to { interface-type 
interface-num | interface-name } ] }&<1-10>. For detail descriptions of interface-type, 
interface-num and interface-name parameters, refer to the corresponding descriptions 
in  Port Command Manual. &<1-10> means that the preceding parameters can be 
entered up to 10 times. 
slot slot-num: Displays STP information about a specified slot. 
brief: Displays only port state, port protection type and port role in the corresponding 
instance.