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

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
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                      7: .\" acknowledgement:  ``This product includes software developed by the
                      8: .\" University of California, Berkeley and its contributors'' in the
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                     11: .\" Neither the name of the University nor the names of its contributors may
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                     14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     15: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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                     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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