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JUNOSe 11.1.x Physical Layer Configuration Guide
t1 remote-loopback
Monitoring Interfaces
From User Exec mode, use the following show commands to monitor and display
the T3 interface, T1 interface, and HDLC serial data channel information:
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Monitoring Interfaces
remote line inband—Sends a repeating 5-bit inband pattern (00001) to the
remote end requesting that it enter into a network line loopback
remote payload [ fdl ] [ ansi ] 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 facilities data
link (FDL) ANSI bit loopback on the T1 channel. You can optionally specify
fdl and ansi.
If you do not specify an option, the router will set a local loopback for the channel.
Example
host1(config-controll)#t1 2 loopback local
Use the no version to deactivate loopback. If you specify the remote keyword,
the no version sends the 16-bit ESF data link code word or inband pattern to
deactivate the loopback at the remote end based on the last activate request sent
to the remote end. If you do not specify the remote keyword, the no version
clears the local loopback configuration.
See t1 loopback.
Use to enable the acceptance of loopback commands issued from a remote
router.
Example
host1(config-controll)#t1 2 remote-loopback
Use the no version to restore the factory default, which is to reject loopback
commands issued from a remote router.
See t1 remote-loopback.
Monitor channelized T3 interfaces on a slot and port.
host1#show controllers t3 0/1
Monitor a T1 interface.
host1#show controllers t3 0/1:1
Monitor fractional T1 subchannels.
host1#show controllers t3 ft1
Monitor the state of the serial interface or a slot/port.
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