display loop-detect eth-loop hop-info

Function

The display loop-detect eth-loop hop-info command displays MAC address flapping information.

Format

display loop-detect eth-loop hop-info [ vlan vlan-id | vsi vsi-name | bridge-domain bd-id ]

Parameters

Parameter	Description	Value
vlan vlan-id	Displays MAC address flapping information of a VLAN.	The value is an integer ranging from 1 to 4094.
vsi vsi-name	Displays MAC address flapping information of a VSI.	The value is a string of 1 to 31 case-sensitive characters, spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
bridge-domain bd-id	Displays MAC address flapping information of a BD.	The value is an integer ranging from 1 to 16777215.

Parameter

Description

Value

vlan vlan-id

Displays MAC address flapping information of a VLAN.

The value is an integer ranging from 1 to 4094.

vsi vsi-name

Displays MAC address flapping information of a VSI.

The value is a string of 1 to 31 case-sensitive characters, spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

bridge-domain bd-id

Displays MAC address flapping information of a BD.

The value is an integer ranging from 1 to 16777215.

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
mac	read

Usage Guidelines

Usage Scenario

If MAC address flapping occurs on a device, run the display loop-detect eth-loop hop-info command to check detailed MAC flapping information, including the broadcast domain where MAC flapping occurred and the flapped MAC addresses and interfaces. This information helps locate and analyze MAC flapping problems.

Example

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

# Display MAC address flapping information of VSI a1.

<HUAWEI> display loop-detect eth-loop hop-info vsi a1
DomainName  DomainType  DetectMAC           DetectTime             Port List              
------------------------------------------------------------------------------
a1          vsi         00e0-fc12-3456      2017-01-11 19:04:53    GigabitEthernet0/1/5
                                            2017-01-11 19:04:53    GigabitEthernet0/1/1
                        00e0-fc12-3457      2017-01-11 19:03:53    GigabitEthernet0/1/2
                                            2017-01-11 19:03:53    2.2.2.9, 100

**Table 1** Description of the **display loop-detect eth-loop hop-info** command output
Item	Description
DomainName	Broadcast domain name.
DomainType	Broadcast domain type.
DetectMAC	Flapped MAC address.
DetectTime	Flapped Time.
Port List	List of flapped interfaces.