[src/trunk]: src/share/man/man4 document link1

[explorer <explorer%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9aee574cc172
branches:  trunk
changeset: 474108:9aee574cc172
user:      explorer <explorer%NetBSD.org@localhost>
date:      Mon Jun 28 07:56:56 1999 +0000

description:
document link1

diffstat:

 share/man/man4/gre.4 |  8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diffs (22 lines):

diff -r c928194a5362 -r 9aee574cc172 share/man/man4/gre.4
--- a/share/man/man4/gre.4      Mon Jun 28 07:52:38 1999 +0000
+++ b/share/man/man4/gre.4      Mon Jun 28 07:56:56 1999 +0000
@@ -1,4 +1,4 @@
-.\" $NetBSD: gre.4,v 1.6 1999/03/16 01:19:16 garbled Exp $
+.\" $NetBSD: gre.4,v 1.7 1999/06/28 07:56:56 explorer Exp $
 .\"
 .\" Copyright 1998 (c) The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -191,6 +191,12 @@
 one directly over the tunnel to prevent loops. This is possibly not
 the best solution.
 .Pp
+To avoid the address munging described above, turn on the link1 flag
+on the ifconfig command line.  This implies that the GRE packet
+destination (set via greconfig -d) and the ifconfig remote host are
+not the same IP addresses, and that the GRE destination does not route
+over the greX interface itself.
+.Pp
 GRE RFC not yet fully implemented (no GRE options), no other protocols
 yet than IP over IP.
 .Pp