Command Manual (For Soliton) – Port Basic Configuration
H3C S3100 Series Ethernet Switches
Chapter 1 Port Basic Configuration
Commands
1-24
[Sysname-Ethernet1/0/5] link-delay 8
1.1.18 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.
1.1.19 loopback-detection control enable
Syntax
loopback-detection control enable
undo loopback-detection control enable
View
Ethernet port view
