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
          interface is accessible at address 127.0.0.1 (non-standard);
          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(5N), inet(5F).

     BUGS
          It should handle all address and protocol families.  An
          approved network address should be reserved for this
          interface.






























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