3Com H3C S3100 16C SI Manual - page 11
H3C Loopback Detection Feature Manual
Release 2107
Chapter 2 Loopback Detection Configuration
Commands
2-7
By default, the loopback port auto-shutdown function is enabled on ports if the device
boots with the default configuration file (config.def); if the device boots with null
configuration, this function is disabled.
Note:
You cannot enable both the loopback port control function (with the loopback-detection
control enable command) and the loopback port auto-shutdown function on a port. If
you do so, the function configured later will take effect.
Related command: loopback-detection enable, loopback-detection control
enable.
Example
# Enable the loopback port auto-shutdown function on port Ethernet 1/0/1.
System View: return to User View with Ctrl+Z.
[H3C] loopback-detection enable
[H3C] interface ethernet 1/0/1
[H3C-Ethernet1/0/1] loopback-detection shutdown enable