Display Loopback-Detection - H3C S5120-EI Series Command Reference Manual

Field
Administratively
Link-Aggregation interface
down
OAM connection failure
DLDP connection failure
Loopback detection-protected
BPDU-protected
Monitor-Link uplink down

display loopback-detection

Syntax
display loopback-detection [ | { begin | exclude | include } regular-expression ]
View
Any view
Default level
1: Monitor level
Parameters
|: Filters command output by specifying a regular expression. For more information about regular
expressions, see the Fundamentals Configuration Guide.
begin: Displays the first line that matches the specified regular expression and all lines that follow.
exclude: Displays all lines that do not match the specified regular expression.
include: Displays all lines that match the specified regular expression.
regular-expression: Specifies a regular expression, which is a case sensitive string of 1 to 256 characters.
Description
Use the display loopback-detection command to display the status of the loopback detection function.
If loopback detection is enabled, this command also displays the detection interval and ports in a loop
condition.
Examples
# Display information about loopback detection.
<Sysname> display loopback-detection
Loopback-detection is running.
Loopback-detection is in multi-port mode.
Detection interval is 30 seconds.
No port is detected with loopback.
Description
The port was brought down with the shutdown command. To restore the
physical state of the interface, use the undo shutdown command.
The aggregate interface corresponding to the aggregation group to which the
current interface belongs was shut down with the shutdown command.
OAM connection fails (possibly because the connection fails to be established
or the current connection is disconnected).
DLDP connection fails (possibly because the connection fails to be established
or the current connection is disconnected).
The interface is shut down because a loop is detected on it.
The interface is shut down by the BPDU guard function.
The uplink of the current monitor link group to which the current interface
belongs is down.
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