lo(5)                                                       lo(5)



     NAME
          lo - software loopback network interface

     SYNOPSIS
          pseudo-device loop

     DESCRIPTION
          The loop interface is a software loopback mechanism which
          may be used for performance analysis, software testing,
          and/or local communication.  By default, the loopback inter-
          face is accessible at address 127.0.0.1 (nonstandard); this
          address may be changed with the SIOCSIFADDR ioctl.

     DIAGNOSTICS
          lo%d: can't handle af%d.  The interface was handed a message
          with addresses formatted in an unsuitable address family;
          the packet was dropped.

     SEE ALSO
          intro(5), inet(5F).

     BUGS
          It should handle all address and protocol families.  An ap-
          proved network address should be reserved for this inter-
          face.






























     April, 1990                                                     1