Loopback; Loopback-Detection Control Enable - H3C s3100 series Command Manual

Examples
# Set the port state change delay of Ethernet 1/0/5 to 8 seconds.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] interface Ethernet1/0/5
[Sysname-Ethernet1/0/5] link-delay 8

loopback

Syntax
loopback { external | internal }
View
Ethernet port view
Parameter
external: Performs external loop test. In the external loop test, self-loop headers must be used on the
port of the switch ( for 100M port, the self-loop headers are made from four cores of the 8-core cables,
for 1000M port, the self-loop header are made from eight cores of the 8-core cables, then the packets
forwarded by the port will be received by itself.). The external loop test can locate the hardware failures
on the port.
internal: Performs internal loop test. In the internal loop test, self loop is established in the switching
chip to locate the chip failure which is related to the port.
Description
Use the loopback command to perform a loopback test on the current Ethernet port to check whether
the Ethernet port works normally. The loopback test terminates automatically after running for a specific
period.
By default, no loopback test is performed on the Ethernet port.
Example
# Perform an internal loop test on Ethernet1/0/1.
<Sysname> system-view
System View: return to User View with Ctrl+Z.
[Sysname] interface ethernet 1/0/1
[Sysname-Ethernet1/0/1] loopback internal
Loopback internal succeeded.

loopback-detection control enable

Syntax
loopback-detection control enable
undo loopback-detection control enable
View
Ethernet port view
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