Installation manual

Command Manual - Port
Quidway S3000-EI Series Ethernet Switches Chapter 1 Ethernet Port Configuration Commands
Huawei Technologies Proprietary
1-12
Description
Using the command, you can enable loopback detection controlled function on Trunk
and Hybrid port, that is, when the system finds out that ports on a certain VLAN on
Trunk or Hybrid port is looped back, it then makes the Trunk and Hybrid port operate
under control, meantime, deletes the port corresponding MAC address entry. Using
the undo loopback-detection control enable command, you can disable this
function, that is, when the system finds out that port on a certain VLAN on Trunk or
Hybrid port is looped back, it only reports the Trap information. The Trunk or Hybrid
port is still operates in the normal state.
By default, loopback detection controlled function on Trunk or Hybrid port is enabled.
Note that, this command has no effect on Access ports.
Example
# Enable the port loopback detection controlled function.
[Quidway] loopback-detection control enable
1.1.14 loopback-detection enable
Syntax
loopback-detection enable
undo loopback-detection enable
View
System view/Ethernet port view
Parameter
none
Description
Using loopback-detection enable command, you can enable the port loopback
detection. If there is a loopback port found, the switch will put it under control. Using
undo loopback-detection enable command, you can disable the port loopback
detection.
Using this command in the system, you can enable/disable the port loopback detection
function of the entire device; using this command in Ethernet port view, you can
enable/disable the port loopback detection function of the current port.
By default, port loopback detection is enabled.
For the related command, see display loopback-detection.