E1 Set Loopback - H3C MSR 20-20 Command Reference Manual

Description
Example

e1 set loopback

Syntax
View
Parameter
Description
Related command:
Example
Use the
e1 set frame-format
channel.
Use the
undo e1 set frame-format
no-CRC4.
# Set E1 channel 1 to use framing format CRC4.
<Sysname> system-view
[Sysname] controller cpos 1/0
[Sysname-Cpos1/0] e1 1 set frame-format crc4
e1 e1-number set loopback { local | payload | remote }
undo e1 e1-number set loopback
CPOS interface view
e1-number: Number of an E1 channel on the CPOS interface, in the range 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.
Use the
e1 set loopback
channel.
Use the undo e1 set loopback
By default, loopback is disabled.
You may test E1 channels in different depths 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.
display controller cpos e1.
# Enable external payload loopback on E1 channel 1.
<Sysname> system-view
[Sysname] controller cpos 1/0
[Sysname-Cpos1/0] e1 1 set loopback payload
command to set the framing format of an E1
command to restore the default, that is,
command to configure the loopback mode of the E1
command to remove a loopback.
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