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Fat AP and Cloud AP V200R010C00 Command Reference

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display stp abnormal-interface

display stp abnormal-interface

Function

The display stp abnormal-interface command displays information about abnormal interfaces running the Spanning Tree Protocol (STP).

Format

display stp [ instance instance-id ] abnormal-interface

Parameters

Parameter Description Value
instance instance-id

Displays the status and statistics of a specified spanning tree instance.

If instance instance-id is not specified, the status and statistics of all spanning tree instances will be displayed in the sequence of the interface numbers.

The value is an integer in the range 0 to 4094. The value 0 indicates a common and internal spanning tree (CIST) instance.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Usage Scenario

If a device has many interfaces and the display stp command output displays vast information, viewing information about abnormal interfaces running STP is difficult.

You can use the display stp abnormal-interface command to view information about abnormal interfaces running STP.

Example

# Display information about abnormal interfaces in process 0 running STP

<Huawei> display stp instance 0 abnormal-interface
MSTID    Interface                     Status          Reason                   
    0    GigabitEthernet0/0/1          DISCARDING      LOOP-Protected
Table 6-21  Description of the display stp abnormal-interface command output

Item

Description

MSTID

MSTP instance ID

Interface

Interface type

Status
Status of an interface after the STP protection takes effect
  • DOWN: indicates that the physical status of the interface is Down (including error-down).
  • DISCARDING: indicates the blocked interface after the topology of the spanning tree becomes stable.

Reason
An interface running STP becomes abnormal due to one of the following:
  • Root-Protected: indicates that the root protection takes effect.
  • Loop-Protected: indicates that the loop protection takes effect.
  • BPDU-Protected: indicates that the BPDU protection takes effect.
  • Loop-Detected: indicates that the loop detection takes effect.
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Updated: 2019-11-21

Document ID: EDOC1100064352

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