BSD 4_3 release

[unix-history] / usr / man / man4 / lo.4

diff --git a/usr/man/man4/lo.4 b/usr/man/man4/lo.4
index e046a7a..e5fe033 100644 (file)
--- a/usr/man/man4/lo.4
+++ b/usr/man/man4/lo.4
@@ -1,5 +1,11 @@
-.TH LO 4 "26 March 1982"
-.UC 4
+.\" Copyright (c) 1983 Regents of the University of California.
+.\" All rights reserved.  The Berkeley software License Agreement
+.\" specifies the terms and conditions for redistribution.
+.\"
+.\"    @(#)lo.4        6.3 (Berkeley) 5/21/86
+.\"
+.TH LO 4 "May 21, 1986"
+.UC 5

 .SH NAME
 lo \- software loopback network interface
 .SH SYNOPSIS
 .SH NAME
 lo \- software loopback network interface
 .SH SYNOPSIS


@@ -9,16 +15,23 @@ The
 .I loop
 interface is a software loopback mechanism which may be
 used for performance analysis, software testing, and/or local
 .I 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.
+communication.
+As with other network interfaces, the loopback interface must have
+network addresses assigned for each address family with which it is to be used.
+These addresses
+may be set or changed with the SIOCSIFADDR ioctl.
+The loopback interface should be the last interface configured,
+as protocols may use the order of configuration as an indication of priority.
+The loopback should \fBnever\fP be configured first unless no hardware
+interfaces exist.

 .SH DIAGNOSTICS
 \fBlo%d: can't handle af%d\fP.  The interface was handed
 a message with addresses formatted in an unsuitable address
 family; the packet was dropped.
 .SH SEE ALSO
 .SH DIAGNOSTICS
 \fBlo%d: can't handle af%d\fP.  The interface was handed
 a message with addresses formatted in an unsuitable address
 family; the packet was dropped.
 .SH SEE ALSO

-intro(4N), inet(4F)
+intro(4N), inet(4F), ns(4F)

 .SH BUGS
 .SH BUGS

-It should handle all address and protocol families.
-An approved network address should be reserved for this
-interface.
+Previous versions of the system enabled the loopback interface
+automatically, using a nonstandard Internet address (127.1).
+Use of that address is now discouraged; a reserved host address
+for the local network should be used instead.