From owner-freebsd-net@FreeBSD.ORG  Wed Mar 14 05:32:24 2012
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 40E10106566B
	for <freebsd-net@freebsd.org>; Wed, 14 Mar 2012 05:32:24 +0000 (UTC)
	(envelope-from cswiger@mac.com)
Received: from asmtpout019.mac.com (asmtpout019.mac.com [17.148.16.94])
	by mx1.freebsd.org (Postfix) with ESMTP id 24BD68FC0C
	for <freebsd-net@freebsd.org>; Wed, 14 Mar 2012 05:32:24 +0000 (UTC)
MIME-version: 1.0
Content-transfer-encoding: 7BIT
Content-type: text/plain; CHARSET=US-ASCII
Received: from [10.1.2.130] (unknown [173.200.187.194])
	by asmtp019.mac.com (Oracle Communications Messaging Server 7u4-23.01
	(7.0.4.23.0) 64bit (built Aug 10 2011))
	with ESMTPSA id <0M0V00C6A0PMGG50@asmtp019.mac.com> for
	freebsd-net@freebsd.org; Wed, 14 Mar 2012 05:32:17 +0000 (GMT)
X-Proofpoint-Virus-Version: vendor=fsecure
	engine=2.50.10432:5.6.7498,1.0.260,0.0.0000
	definitions=2012-03-14_02:2012-03-13, 2012-03-14,
	1970-01-01 signatures=0
X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0
	ipscore=0 suspectscore=0 phishscore=0 bulkscore=0 adultscore=0
	classifier=spam
	adjust=0 reason=mlx scancount=1 engine=6.0.2-1012030000
	definitions=main-1203130374
From: Chuck Swiger <cswiger@mac.com>
In-reply-to: <CALCpEUFs74jZ69gCm-1bwGMKZFdkBas2VdR8x1JHAVzFtWSpBA@mail.gmail.com>
Date: Tue, 13 Mar 2012 22:32:10 -0700
Message-id: <D3ACECC5-598B-4679-A76F-7FDD2780BAFF@mac.com>
References: <CALCpEUE5-HgupRc9VfU4W2B4d07mO9ceTiX05SfQCeA_GXDcOQ@mail.gmail.com>
	<CALCpEUFs74jZ69gCm-1bwGMKZFdkBas2VdR8x1JHAVzFtWSpBA@mail.gmail.com>
To: hiren panchasara <hiren.panchasara@gmail.com>
X-Mailer: Apple Mail (2.1084)
Cc: freebsd-net@freebsd.org
Subject: Re: Use of network_interfaces in rc.conf
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 14 Mar 2012 05:32:24 -0000

On Mar 13, 2012, at 10:18 PM, hiren panchasara wrote:
>> What difference does it make when I have each (separately) in my rc.conf:
>> 
>> 1) no network_interfaces at all
>> 2) network_interfaces="AUTO"

These two are the same.

>> 3) network_interfaces="em0"

This will configure em0 only, using ifconfig_em0 if that is set.
You'd almost certainly want to list loopback, aka lo0, in this list.

>> 4) network_interfaces="NOAUTO"

That's invalid.  If you set:

  ifconfig_em0="NOAUTO"

...then em0 would not be auto-configured.

Regards,
-- 
-Chuck