HP 6125G HP 6125G & 6125G/XG Blade Switches Layer 2 - LAN Switching Co - Page 21

display loopback-detection, Syntax, Default level, Parameters, Description

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Field Cause Description Causes for the physical state of an interface to be DOWN. For more information, see Table 6. Table 6 Causes for the physical state of an interface to be DOWN Field Not connected Administratively Link-Aggregation interface down OAM connection failure DLDP connection failure Loopback detection-protected Description No physical connection exists (possibly because the network cable is disconnected or faulty). The port was shut 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 interface belongs was shut down with the shutdown command. OAM connection fails (possibly because the connection fails to be established or the connection is disconnected). DLDP connection fails (possibly because the connection fails to be established or the connection is disconnected). The interface is shut down because a loop is detected on it. BPDU-protected The interface is shut down by the BPDU guard function. Monitor-Link uplink down The uplink of the monitor link group to which the interface belongs is down. display loopback-detection Syntax View display loopback-detection [ | { begin | exclude | include } regular-expression ] Any view Default level 1: Monitor level Parameters |: Filters command output by specifying a regular expression. For more information about regular expressions, see 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, a case-sensitive string of 1 to 256 characters. Description Use display loopback-detection 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. 13

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13
Field
Description
Cause
Causes for the physical state of an interface to be DOWN. For more information,
see
Table 6
.
Table 6
Causes for the physical state of an interface to be DOWN
Field
Description
Not connected
No physical connection exists (possibly because the network cable is
disconnected or faulty).
Administratively
The port was shut down with the
shutdown
command. To restore the physical
state of the interface, use the
undo shutdown
command.
Link-Aggregation interface
down
The aggregate interface corresponding to the aggregation group to which the
interface belongs was shut down with the
shutdown
command.
OAM connection failure
OAM connection fails (possibly because the connection fails to be established
or the connection is disconnected).
DLDP connection failure
DLDP connection fails (possibly because the connection fails to be established
or the connection is disconnected).
Loopback detection-protected
The interface is shut down because a loop is detected on it.
BPDU-protected
The interface is shut down by the BPDU guard function.
Monitor-Link uplink down
The uplink of the monitor link group to which the interface belongs is 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
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, a case-sensitive string of 1 to 256 characters.
Description
Use
display loopback-detection
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.