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Annotation of 43BSDTahoe/man/man4/lo.4, revision 1.1.1.1

1.1       root        1: .\" Copyright (c) 1983 Regents of the University of California.
                      2: .\" All rights reserved.  The Berkeley software License Agreement
                      3: .\" specifies the terms and conditions for redistribution.
                      4: .\"
                      5: .\"    @(#)lo.4        6.3 (Berkeley) 5/21/86
                      6: .\"
                      7: .TH LO 4 "May 21, 1986"
                      8: .UC 5
                      9: .SH NAME
                     10: lo \- software loopback network interface
                     11: .SH SYNOPSIS
                     12: .B pseudo-device loop
                     13: .SH DESCRIPTION
                     14: The
                     15: .I loop
                     16: interface is a software loopback mechanism which may be
                     17: used for performance analysis, software testing, and/or local
                     18: communication.
                     19: As with other network interfaces, the loopback interface must have
                     20: network addresses assigned for each address family with which it is to be used.
                     21: These addresses
                     22: may be set or changed with the SIOCSIFADDR ioctl.
                     23: The loopback interface should be the last interface configured,
                     24: as protocols may use the order of configuration as an indication of priority.
                     25: The loopback should \fBnever\fP be configured first unless no hardware
                     26: interfaces exist.
                     27: .SH DIAGNOSTICS
                     28: \fBlo%d: can't handle af%d\fP.  The interface was handed
                     29: a message with addresses formatted in an unsuitable address
                     30: family; the packet was dropped.
                     31: .SH SEE ALSO
                     32: intro(4N), inet(4F), ns(4F)
                     33: .SH BUGS
                     34: Previous versions of the system enabled the loopback interface
                     35: automatically, using a nonstandard Internet address (127.1).
                     36: Use of that address is now discouraged; a reserved host address
                     37: for the local network should be used instead.

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