display stp global (All views)

Function

The display stp global command displays global Spanning Tree Protocol (STP) information.

Format

display stp global

Parameters

None

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
mstp	read

Usage Guidelines

Usage Scenario

If a device has many interfaces, running the display stp command displays a large amount of information, which is challenging to query wanted information and global information quickly. Running the display stp brief command displays only information about spanning trees on interfaces, but not global information.

To view global STP information conveniently, run the display stp global command.

Precautions

If you run this command in the MSTP process view without specifying an MSTP process, information about the MSTP process in this view is displayed by default. If you run this command in the other view without specifying an MSTP process, information about MSTP process 0 is displayed by default.

Example

The actual command output varies according to the device. The command output here is only an example.

# Display brief STP information.

<HUAWEI> display stp global
Protocol Status            : Enabled                                            
Bpdu-filter default        : Disabled                                           
Tc-protection              : Disabled                                           
Tc-protection threshold    : 1                                                  
Tc-protection interval     : 2s                                                 
Edged port default         : Enabled                                            
Pathcost-standard          : Dot1t                                              
Timer-factor               : 3                                                  
Transmit-limit             : 10                                                 
Bridge-diameter            : 7                                                  
-------[CIST Global Info][Mode MSTP]-------                                     
CIST Bridge         :61440.00e0-fc12-3456                                       
Config Times        :Hello 2s MaxAge 20s FwDly 15s MaxHop 20                    
Active Times        :Hello 2s MaxAge 20s FwDly 15s MaxHop 20                    
CIST Root/ERPC      :61440.00e0-fc12-3456 / 0                                   
CIST RegRoot/IRPC   :61440.00e0-fc12-3456 / 0                                   
CIST RootPortId     :0.0                                                        
BPDU-Protection     :Disabled                                                   
TC or TCN received  :85                                                         
TC count per hello  :0                                                          
STP Converge Mode   :Normal                                                     
Time since last TC  :0 days 9h:12m:34s                                          
Number of TC        :13                                                         
Last TC occurred    :GigabitEthernet0/1/4

**Table 1** Description of the **display stp global (All views)** command output
Item	Description
Protocol Status	Spanning Tree Protocol (STP) status: Enabled. Disabled.
Bpdu-filter default	Whether the function of configuring device interfaces as bridge protocol data unit (BPDU) filter interfaces is enabled: Enabled. Disabled.
Tc-protection	Topology change (TC) protection status: Enabled. Disabled.
Tc-protection threshold	Maximum number of TC BPDUs that the MSTP device can process within a specified time.
Tc-protection interval	Time taken by MSTP to process the maximum number of TC BPDUs and immediately refresh forwarding entries.
Edged port default	Whether the function of configuring all ports of the device as edge ports is enabled: Enabled. Disabled.
Pathcost-standard	Method of calculating the MSTP path cost.
Timer-factor	Multiplier of Hello time.
Transmit-limit	Maximum number of BPDUs that the current interface can send each Hello time. For details, see stp transmit-limit.
Bridge-diameter	Network diameter of the MSTP.
CIST Bridge	Common and internal spanning tree (CIST) bridge ID. The 16 left-most bits represent the bridge's priority in the CIST. The 48 right-most bits represent the bridge's MAC address.
CIST Root/ERPC	CIST root bridge ID/Cost of the external path (path from the switch to the CIST root bridge).
CIST RegRoot/IRPC	ID of the CIST region root bridge/Cost of the internal path (path from the switch to the CIST region root bridge).
CIST RootPortId	ID of the CIST root port. 0.0 indicates that the switch is the root bridge and does not provide any root port.
Config Times	Manually configured BPDU parameters: Hello: interval at which BPDUs are sent. MaxAge: maximum lifetime of a BPDU. FwDly: time interface status transition takes. MaxHop: maximum number of hops in the MST region.
Active Times	BPDUs parameters that are being used: Hello: interval at which BPDUs are sent. MaxAge: maximum lifetime of a BPDU. FwDly: time interface status transition takes. MaxHop: maximum number of hops in the MST region.
BPDU-Protection	Whether BPDU protection is enabled: Disabled. Enabled.
TC or TCN received	Number of received TC or TCN BPDUs.
TC count per hello	Number of TC BPDUs received each Hello time.
STP Converge Mode	STP convergence mode, which can be fast or normal.
Mode	STP mode: STP. RSTP. MSTP.
Time since last TC	Time past since the last topology changed.
Number of TC	Number of topology changes.
Last TC occurred	Interface that causes the last topology change. This parameter is not displayed when Number of TC is 0.