display stp bridge

Function

The display stp bridge command displays details about the spanning tree of a bridge.

Format

STP/RSTP/MSTP: display stp [ process process-id ] bridge { root | local }

VBST: display stp [ vlan vlan-id ] bridge { root | local }

Parameters

Parameter	Description	Value
process process-id	Multiple Spanning Tree Protocol (MSTP) process ID If process process-id is not specified, details about the spanning tree of MSTP process 0 will be displayed.	The value is an integer ranging from 1 to 31.
root	Displays details about the spanning tree of the root bridge.	-
local	Displays details about the spanning tree of the local bridge.	-
vlan vlan-id	Displays details about the spanning tree of a bridge in a specified VLAN. If vlan vlan-id is not specified, details about the spanning trees of bridges in all VLANs are displayed. NOTE: If vlan vlan-id is specified, only information about bridges running VBST is displayed.	The value is an integer that ranges from 1 to 4094.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Usage Scenario

When a device provides many interfaces, running the display stp command displays a large amount of information, and it is difficult to find information about the spanning trees of the root and local bridges.

Using the display stp bridge command, you can easily view details about the spanning trees of the root and local bridges.

Precautions

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

Example

# Display details about the spanning tree of the root bridge of MSTP process 0 when STP/RSTP/MSTP is running.

<HUAWEI> display stp bridge root
MSTID              Root ID  Root Cost Hello Max Forward Root Port               
                                       Time Age   Delay                         
----- -------------------- ---------- ----- --- ------- -----------------       
    0 61440.781d-ba56-f06c          0     2  20      15                         
    1 61440.781d-ba56-f06c          0     2  20      15

# Display details about the spanning tree of the root bridge running VBST in VLAN 5.

<HUAWEI> display stp vlan 5 bridge root
 VLAN-ID           Root ID  Root Cost Hello Max Forward Root Port                                                                   
                                       Time Age   Delay                                                                             
----- -------------------- ---------- ----- --- ------- -----------------                                                           
    5 32773.5489-9876-a2b0      20000     2  20      15 GigabitEthernet0/0/5

**Table 1** Description of the **display stp bridge** command output
Item	Description
MSTID	MSTP instance ID
Root ID	Root bridge ID
Root Cost	Root path cost
Hello Time	Interval at which Bridge Protocol Data Units (BPDUs) are sent from the root switch. To specify the parameter, run the stp timer hello command
Max Age	Maximum TTL of a BPDU. To specify the parameter, run the stp timer max-age command
Forward Delay	Delay in interface status transition. To specify the parameter, run the stp timer forward-delay command
Root Port	Root interface
VLAN-ID	VLAN ID.