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JUNOSe 11.1.x Physical Layer Configuration Guide
path ds1|e1 loopback remote
path ds1 remote-loopback
path ds3 equipment loopback
150
Testing Interfaces
Use to place a remote device, connected at the T1 over SONET/SDH VT layer,
in loopback.
Specify one of the following options:
line fdl ansi (T1 only) Sends a repeating 16-bit ESF data link code word
(00001110 11111111) to the remote end requesting that it enter into a
network line loopback. Specify the ansi keyword to enable the remote line
facilities data link (FDL) ANSI bit loopback on the T1 line, according to the
ANSI T1.403 specification.
line fdl bellcore (T1 only) Sends a repeating 16-bit ESF data link code word
(00010010 11111111) to the remote end requesting that it enter into a
network line loopback. Specify the bellcore keyword to enable the remote
line FDL Bellcore bit loopback on the T1 line, according to the Bellcore
TR-TSY-000312 specification.
payload [ fdl ] [ ansi ] (T1 only) Sends a repeating 16-bit ESF data link
code word (00010100 11111111) to the remote end requesting that it enter
into a network payload loopback. Enables the remote payload FDL ANSI bit
loopback on the T1 line. You can optionally specify fdl and ansi.
Example
host1(config-controll)#path 12 ds1 1/3/4 loopback remote line fdl ansi
Use the no version to send the 16-bit ESF data link code word to deactivate the
loopback at the remote end, depending on the last activate request sent to the
remote end.
See path ds1|e1 loopback.
Use to enable the router to accept remote loopback requests from a remote
device connected at the T1 over SONET/SDH VT layer.
Example
host1(config-controll)#path 12 ds1 1/3/4 remote-loopback
Use the no version to restore the default, which is to reject remote loopback
requests.
See path ds1 remote-loopback.
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