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 (nonstandard);
     this address may be changed with the SIOCSIFADDR ioctl.

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

STATUS MESSAGES AND VALUES
     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
     inet(5F), intro(5)






























January 1992                                                    1