[src/trunk]: src/share/man/man4 Document SUBNETSARELOCAL, HOSTZEROBROADCAST

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

details:   https://anonhg.NetBSD.org/src/rev/5e954702dabc
branches:  trunk
changeset: 474025:5e954702dabc
user:      sommerfeld <sommerfeld%NetBSD.org@localhost>
date:      Sat Jun 26 06:26:13 1999 +0000

description:
Document SUBNETSARELOCAL, HOSTZEROBROADCAST

diffstat:

 share/man/man4/options.4 |  15 ++++++++++++++-
 1 files changed, 14 insertions(+), 1 deletions(-)

diffs (29 lines):

diff -r 9fcfb44982a7 -r 5e954702dabc share/man/man4/options.4
--- a/share/man/man4/options.4  Sat Jun 26 06:16:47 1999 +0000
+++ b/share/man/man4/options.4  Sat Jun 26 06:26:13 1999 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: options.4,v 1.80 1999/06/12 21:22:11 tron Exp $
+.\"    $NetBSD: options.4,v 1.81 1999/06/26 06:26:13 sommerfeld Exp $
 .\"
 .\" Copyright (c) 1996
 .\"    Perry E. Metzger.  All rights reserved.
@@ -934,6 +934,19 @@
 .Xr inet 4
 for details.
 This option is currently required.
+.It Cd options SUBNETSARELOCAL
+Sets default value for net.inet.ip.subnetsarelocal variable, which
+controls whether non-directly-connected subnets of connected networks
+are considered "local" for purposes of choosing the MSS for a TCP
+connection.  This is mostly present for historic reasons and
+completely irrelevant if you enable Path MTU discovery.
+.It Cd options HOSTZEROBROADCAST
+Sets default value for net.inet.ip.hostzerobroadcast variable, which
+controls whether the zeroth host address of each connected subnet is
+also considered a broadcast address.  Default value is "1", for
+compatibility with old systems; if this is set to zero on all hosts on
+a subnet, you should be able to fit an extra host per subnet on the
+".0" address.
 .It Cd options MCLSHIFT=value
 This option is the base-2 logarithm of the size of mbuf clusters.
 The