display loopback-detect

Function

The display loopback-detect command displays the loopback detection configuration and status of loopback detection enabled interfaces.

Format

display loopback-detect

Parameters

None

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

This command is used to check the loopback detection configuration and status of each interface on which loopback detection is enabled.

Example

# Display the loopback detection configuration and status of loopback detection enabled interfaces.

<HUAWEI> display loopback-detect
Loopback-detect sending-packet interval:  5                                                                                         
                                                                                                                                    
(A): Auto Loopback-detect                                                                                                           
-----------------------------------------------------------------                                                                   
Interface                     RecoverTime  Action     Status                                                                        
-----------------------------------------------------------------                                                     
GigabitEthernet0/0/1          30           quitvlan(A) NORMAL                     
-----------------------------------------------------------------

**Table 1** Description of the display loopback-detect command output
Item	Description
Loopback-detect sending-packet interval	Interval between sending loopback detection packets, in seconds. For details, see loopback-detect packet-interval.
Interface	Interface on which loopback detection is enabled.
RecoverTime	Interface recovery time, in seconds. For details, see loopback-detect recovery-time.
Action	Action performed when a loopback is detected on an interface: block: blocks the interface. After the interface is blocked, it is isolated from other interfaces and does not forward received data packets to other interfaces. nolearn: disables MAC address learning on the interface. When a loopback is detected on the interface, the interface stops learning MAC addresses. shutdown: shuts down the interface. When a loopback is detected on an interface, the interface is shut down. trap: only sends a trap. When a loopback is detected on an interface, the interface only sends a trap. trap(A): only sends a trap. (A) indicates that automatic loopback detection is performed on an interface. quitvlan: quits VLANs. When a loopback is detected on an interface, the interface exits from the VLAN in which a loop occurs. quitvlan(A): quits VLANs. (A) indicates that automatic loopback detection is performed on an interface. To specify the parameter, run the loopback-detect action or loopback-detect auto action command.
Status	Status of a loopback detection enabled interface: NORMAL: No loopback is detected on the interface. BLOCK: A loopback is detected on the interface and the interface is blocked. NOLEARN: A loopback is detected on the interface and the MAC address learning is disabled on the interface. SHUTDOWN: A loopback is detected on the interface and the interface is shut down. TRAP: A loopback is detected on the interface and a trap is sent. QUITVLAN: A loopback is detected on the interface and the interface exits from the VLAN in which a loop occurs.