Filter
Top Products
170 CHAPTER 8: GENERAL ETHERNET INTERFACE CONFIGURATION COMMANDS
Parameter external: Enables external loopback testing on an Ethernet interface. The support
for this keyword varies with device models.
internal: Enables internal loopback testing on an Ethernet interface. The support
for this keyword varies with device models.
Description Use the
loopback command to enable Ethernet interface loopback testing.
Use the undo loopback command to disable Ethernet interface loopback
testing.
By default, Ethernet interface loopback testing is disabled.
n
■ The support for these two commands varies with device models.
■ Ethernet interface loopback testing should be enabled while testing certain
functionalities, such as during the initial identification of any network failure.
■ While enabled, Ethernet interface loopback testing will work in a full-duplex
mode. The interface will return to its original state upon completion of the
loopback testing.
Example # Configure to enable loopback testing on Ethernet 1/0.
<Sysname> system-view
[Sysname] interface ethernet 1/0
[Sysname-Ethernet1/0] loopback internal
port link-mode
Syntax port link-mode { bridge | route }
undo port link-mode
View Ethernet interface view
Parameter bridge: Works in bridge mode.
route: Works in route mode.
Description Use the
port link-mode command to change the working mode of the Ethernet
interface.
Use the
undo port link-mode command to restore the original working mode.
According to the layer at which the device processes received data packets,
Ethernet interfaces can work in bridge or route mode. For a device, some
interfaces can work only in bridge mode, some can work only in route mode, and
others can work in bridge mode or route mode. This command is only applicable
to Ethernet interfaces whose working mode can be changed.
c
CAUTION: