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Ethernet Port Configuration Introduction 61
Loopback detection function for a port is enabled only when the loopback-detection
enable command is enabled under both system view and port view.
When the undo loopback-detection enable command is used under system view, the
loopback detection function will be disabled for all ports.
Setting Loopback Detection for an Ethernet Port
Use the following command to enable port loopback detection and set the detection
interval for the external loopback condition of each port. If there is a loopback port
found, the Switch will put it under control.
Other correlative configurations function only when port loopback detection is
enabled in System View.
Perform the following configuration in the view listed in Table 45.
Enter the Ethernet port view interface
interface-type
interface-number
-
Enable the loopback detection
function for a specified port
loopback-detection
enable
Optional.By default, the loopback
detection function is disabled.
Enable the loopback detection
and control function for Trunk
ports and Hybrid ports
loopback-detection
control enable
Optional.By default, the loopback
detection and control function is disabled.
Configure the system to
detect loopback in all the
VLANs with Trunk ports and
Hybrid ports
loopback-detection
per-vlan enable
Optional.
By default, system only detects loopback
for the default VLANs with Trunk ports
and Hybrid ports.
Display the loopback detection
information
display
loopback-detection
Optional.
This command can be used under any
view
Table 45 Setting Loopback Detection for the Ethernet Port
Operation Command
Enable loopback detection on the port (System
View/Ethernet Port View)
loopback-detection enable
Disable loopback detection on the port (System
View/Ethernet Port View)
undo loopback-detection enable
Enable the loopback controlled function of the
trunk and hybrid ports (Ethernet Port View)
loopback-detection control
enable
Disable the loopback controlled function of the
trunk and hybrid ports (Ethernet Port View)
undo loopback-detection control
enable
Set the external loopback detection interval of
the port (System View)
loopback-detection
interval-time time
Restore the default external loopback detection
interval of the port (System View)
undo loopback-detection
interval-time
Configure that the system performs loopback
detection to all VLANs on Trunk and Hybrid
ports (Ethernet Port View)
loopback-detection per-vlan
enable
Configure that the system only performs
loopback detection to the default VLANs on the
port (Ethernet Port View)
undo loopback-detection
per-vlan enable
Table 44 Configure loopback detection for Ethernet port (continued)
Operation Command Description