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Annotation of 43BSDReno/share/man/man4/lo.4, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1983 The Regents of the University of California.
        !             2: .\" All rights reserved.
        !             3: .\"
        !             4: .\" Redistribution and use in source and binary forms are permitted provided
        !             5: .\" that: (1) source distributions retain this entire copyright notice and
        !             6: .\" comment, and (2) distributions including binaries display the following
        !             7: .\" acknowledgement:  ``This product includes software developed by the
        !             8: .\" University of California, Berkeley and its contributors'' in the
        !             9: .\" documentation or other materials provided with the distribution and in
        !            10: .\" all advertising materials mentioning features or use of this software.
        !            11: .\" Neither the name of the University nor the names of its contributors may
        !            12: .\" be used to endorse or promote products derived from this software without
        !            13: .\" specific prior written permission.
        !            14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            15: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            16: .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            17: .\"
        !            18: .\"    @(#)lo.4        6.5 (Berkeley) 6/23/90
        !            19: .\"
        !            20: .TH LO 4 "June 23, 1990"
        !            21: .UC 5
        !            22: .SH NAME
        !            23: lo \- software loopback network interface
        !            24: .SH SYNOPSIS
        !            25: .B pseudo-device loop
        !            26: .SH DESCRIPTION
        !            27: The
        !            28: .I loop
        !            29: interface is a software loopback mechanism which may be
        !            30: used for performance analysis, software testing, and/or local
        !            31: communication.
        !            32: As with other network interfaces, the loopback interface must have
        !            33: network addresses assigned for each address family with which it is to be used.
        !            34: These addresses
        !            35: may be set or changed with the SIOCSIFADDR ioctl.
        !            36: The loopback interface should be the last interface configured,
        !            37: as protocols may use the order of configuration as an indication of priority.
        !            38: The loopback should \fBnever\fP be configured first unless no hardware
        !            39: interfaces exist.
        !            40: .SH DIAGNOSTICS
        !            41: \fBlo%d: can't handle af%d\fP.  The interface was handed
        !            42: a message with addresses formatted in an unsuitable address
        !            43: family; the packet was dropped.
        !            44: .SH SEE ALSO
        !            45: intro(4), inet(4), ns(4)
        !            46: .SH BUGS
        !            47: Previous versions of the system enabled the loopback interface
        !            48: automatically, using a nonstandard Internet address (127.1).
        !            49: Use of that address is now discouraged; a reserved host address
        !            50: for the local network should be used instead.

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