lo.4

<B>Digital的Unix操作系统VAX 4.2源码</B>

.\" SCCSID: @(#)lo.4	8.1	9/11/90
.TH lo 4
.SH Name
lo \- loop network interface
.SH Syntax
.B pseudo-device loop
.SH Description
.NXR "loop network interface"
.NXR "lo keyword"
The
.PN loop
interface is a software loopback mechanism that can 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.
.SH Diagnostics
.B "lo%d: can't handle af%d"
.br
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)