R3303-HP HSR6800 Routers Interface Command Reference

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Default command level
2: System level
Parameters
line-number: E1 line number in the range of 1 to 16.
crc4: Sets the frame format to CRC4.
no-crc4: Sets the frame format to no-CRC4.
Usage guidelines
Configure this command only when the specified E1 line is working in framed format (which can be set
using the undo e1 unframed command).
Examples
# Set the framing format to CRC4 for the first E1 line on interface E3 2/0/0.
<Sysname> system-view
[Sysname] controller e3 2/0/0
[Sysname-E3 2/0/0] e1 1 set frame-format crc4
Related commands
e1 unframed
e1 set loopback
Use e1 set loopback to set an E1 line in a loopback mode on the E3 interface.
Use undo e1 set loopback to restore the default.
Syntax
e1 line-number set loopback { local | payload | remote }
undo e1 line-number set loopback
Default
Loopback is disabled on E1 lines.
Views
CE3 interface view
Default command level
2: System level
Parameters
line-number: E1 line number in the range of 1 to 16.
local: Sets the E1 line in internal loopback mode.
payload: Sets the E1 line in payload loopback mode.
remote: Sets the E1 line in external loopback mode.
Usage guidelines
If an E1 line encapsulated with PPP is in loopback mode, it is normal that the state of the link layer
protocol is reported down.