H3C S7500E Series Command Manual page 152

Command Manual – Port Correlation Configuration
H3C S7500E Series Ethernet Switches
undo loopback-detection enable
View
System view, Ethernet port view
Parameters
None
Description
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.
Related commands: loopback-detection control enable.
Caution:
Loopback detection on a given port is enabled only after the loopback-detection
enable command has been issued in both system view and the port 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.
Examples
# Enable loopback detection on port Ethernet 2/0/1.
<Sysname> system-view
[Sysname] loopback-detection enable
[Sysname] interface ethernet 2/0/1
[Sysname-Ethernet2/0/1] loopback-detection enable
Chapter 1 Ethernet Port Configuration
1-19
Commands