H3C S3100 8C SI Operation Manual page 171

Operation Manual – Port Basic Configuration
H3C S3100 Series Ethernet Switches
Operation
Enable loopback
detection on a
specified port
Enable loopback
port control on the
trunk or hybrid port
Enable the loopback
port auto-shutdown
function
Configure the
system to run
loopback detection
on all VLANs of the
current trunk or
hybrid port
Caution:
To enable loopback detection on a specific port, you must use the
loopback-detection enable command in both system view and the specific port
view.
After you use the undo loopback-detection enable command in system view,
loopback detection will be disabled on all ports.
Command
loopback-detection
enable
loopback-detection
control enable
loopback-detection
shutdown enable
loopback-detection
per-vlan enable
1-6
Chapter 1 Port Basic Configuration
Remarks
Optional
By default, the loopback
detection 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.
Optional
By default, the loopback port
control 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.
Optional
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.
Optional
By default, the system runs
loopback detection only on the
default VLAN of the current trunk
or hybrid port.