loop(7)                        DG/UX R4.11MU05                       loop(7)


NAME
       loop - communications interface software loopback network interface

SYNOPSIS
       loop

DESCRIPTION
       The loop(7) interface is a software loopback mechanism that may be
       used for performance analysis, software testing, and/or local
       communication.  By default, the loopback interface is accessible at
       address 127.0.0.1; this address may be changed with the SIOCSIFADDR
       ioctl.  It is usually called localhost in the DG/UX system /etc/hosts
       file.

       The loop interface will be configured into the DG/UX system only if
       the appropriate one-word entry is included in the system
       configuration file.

EXAMPLE
           loop()

       This entry in a system file will define the loop device.

DIAGNOSTICS
       Use the -i switch with netstat(1C).

SEE ALSO
       system(4).
       intro(6), inet(6F).


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