test interface fdl-payload-loop
Syntax
Release Information
Command introduced before Junos OS Release 7.4.
Description
Send commands over the facilities data link (FDL) on a T1 interface to initiate or terminate a far-end payload loopback using either an ANSI or Bellcore FDL command code. If the far end of the connection is in C-bit parity mode and has been configured to accept payload loopback requests from the near end, the far end executes the request.See the ANSI T1.107 specification for more details.
![]() | Note: The following restrictions apply to this command:
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Options
ansi | — | ANSI FDL command code. |
bellcore | — | Bellcore FDL command code. |
initiate | — | Initiate the far-end payload loopback. |
terminate | — | Terminate the far-end payload loopback. |
t1-fpc/pic/port <:channel> | — | Name of a T1 interface. The channel number indicates a channelized interface. |
Required Privilege Level
view
List of Sample Output
test interface fdl-payload-loopOutput Fields
To display the state and the number of times the interface has placed itself into remote loopback, use the show interfaces extensive command.
Sample Output
test interface fdl-payload-loop
user@host> test interface fdl-payload-loop ansi
initiate t1-1/0/0