Loop detection commands
Use display loopback-detection to display the loop detection configuration and status.
Predefined user roles
# Display the loop detection configuration and status.
<Sysname> display loopback-detection
Loopback detection is enabled.
Loopback detection interval is 30 second(s).
Loopback is detected on following interfaces:
Table 30 Command output
Use loopback-detection action to configure the loop protection action on a port.
Use undo loopback-detection action to restore the default.
Loop protection action:
Block—When a loop is detected on a port, the device generates a log,
disables the port from learning MAC addresses, and blocks inbound traffic on
None—When a loop is detected on a port, the device generates a log but
performs no action on the port.
No-learning—When a loop is detected on a port, the device generates a log
and disables the port from learning MAC addresses.
Shutdown—When a loop is detected on a port, the device generates a log and
shuts down the port to disable it from receiving and sending any frames.