R3102-R3103-HP 6600/HSR6600 Routers Interface Command Reference

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Syntax
e1 e1-number set loopback { local | payload | remote }
undo e1 e1-number set loopback
Default
Loopback is disabled.
Views
CPOS interface view
Default command level
2: System level
Parameters
e1-number: Number of an E1 channel on the CPOS interface, in the range of 1 to 63.
local: Enables internal loopback on the E1 channel.
payload: Enables external payload loopback on the E1 channel.
remote: Enables external loopback on the E1 channel.
Usage guidelines
You can test E1 channels by using the loopback command with different keywords.
In an internal loopback, data of the sender is directly looped to the receiver.
In an external payload loopback, data received by the receiver is looped back at the E1 framer as
payload.
In an external loopback, data received by the receiver is looped back directly without passing through
the E1 framer.
Examples
# Enable external payload loopback on E1 channel 1.
<Sysname> system-view
[Sysname] controller cpos 2/0/0
[Sysname-Cpos2/0/0] e1 1 set loopback payload
Related commands
display controller cpos e1
e1 shutdown
Use e1 shutdown to shut down an E1 channel.
Use undo e1 shutdown to bring up an E1 channel.
Syntax
e1 e1-number shutdown
undo e1 e1-number shutdown
Default
E1 channels are up.