NAME

       atmloop - get/set loopback mode of ATM interfaces

SYNOPSIS

       atmloop -s [-l level] [-r level] [itf]
       atmloop [itf]
       atmloop -q [itf]
       atmloop -V

DESCRIPTION

       atmloop sets or shows the current loopback settings of an ATM interface, and allows to query the loopback
       modes supported by the interface.

       Some  ATM  cards  can  be  configured  to echo data back to the driver (local loopback) or to the network
       (remote loopback). The echoing may be done at several different levels:

       aal    AAL PDUs

       atm    ATM cells

       digital
              bits sent to or received from the line interface

       analog the analog signal

       The levels supported by an interface can be queried with the -q  option.   If  invoked  without  options,
       atmloop displays the current loopback settings.

OPTIONS

       -s     set  loopback  mode. Followed by either -l or -r, both options to set local and remote loopback at
              the same time (if supported by the driver), or none of them to turn off any loopback.

       -l level
              enable local loopback.

       -r level
              enable remote loopback.

       -q level
              query loopback levels supported by the interface.

       -V     print version number of atmloop on standard output and exit.

AUTHOR

       Werner Almesberger, EPFL ICA <Werner.Almesberger@epfl.ch>

SEE ALSO

       atmdiag(8), sonetdiag(8)

Linux                                            April 26, 2000                                       ATMLOOP(8)