3com MSR 20-20 참조 매뉴얼

C

HAPTER

 9: C

ONFIGURATION

 C

OMMANDS

 

FOR

 E

THERNET

 I

NTERFACES

 

IN

 B

RIDGE

 M

ODE

System view/Ethernet interface view

None

Use the loopback-detection enable command to enable loopback detection 
globally or on a specified port.

Use the undo loopback-detection enable command to disable loopback 
detection globally or on a specified port.

By default, loopback detection is disabled for an Access, Trunk, or Hybrid port.

■

If an Access port has been detected with loopback, it will be shutdown. A Trap 
message will be sent to the terminal and the corresponding MAC address If a 
Trunk port or Hybrid port has been detected with loopback, a Trunk message 
will be sent to the terminal. They will be shutdown if the loopback testing 
function is enabled on them. In addition, a Trap message will be sent to the 
terminal and the corresponding MAC address forwarding entries will be 
deleted.

c

■

Loopback detection on a given port is enabled only after the 
loopback-detection enable command has been issued in both system view 
and the interface view of the port.

■

Loopback detection on all ports will be disabled after the issuing of the undo 
loopback-detection enable command under system view.

# Enable loopback detection on the interface Ethernet 1/0.

<Sysname> system-view

[Sysname] loopback-detection enable

[Sysname] interface ethernet 1/0

[Sysname-Ethernet1/0] loopback-detection enable 

loopback-detection interval-time time

System view