From owner-freebsd-questions@FreeBSD.ORG  Mon Dec  4 15:43:59 2006
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
X-Original-To: freebsd-questions@freebsd.org
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id CCF6416A529
	for <freebsd-questions@freebsd.org>;
	Mon,  4 Dec 2006 15:43:59 +0000 (UTC) (envelope-from a@zeos.net)
Received: from jan.ukrtel.net (jan.ukrtel.net [195.5.6.41])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 365B543E27
	for <freebsd-questions@freebsd.org>;
	Mon,  4 Dec 2006 15:41:55 +0000 (GMT) (envelope-from a@zeos.net)
Received: from 17-30-207-82.pool.ukrtel.net ([82.207.30.17]
	helo=host.my.domain) by jan.ukrtel.net with esmtpa (Exim 4.63)
	(envelope-from <a@zeos.net>) id 1GrFxa-0001HK-V5
	for freebsd-questions@freebsd.org; Mon, 04 Dec 2006 17:42:27 +0200
Received: from host.my.domain (localhost [127.0.0.1])
	by host.my.domain (8.13.7/8.13.6) with ESMTP id kB4FgNeV000724
	for <freebsd-questions@freebsd.org>;
	Mon, 4 Dec 2006 17:42:23 +0200 (EET) (envelope-from a@zeos.net)
Received: (from elisej@localhost)
	by host.my.domain (8.13.7/8.13.6/Submit) id kB4FgN2s000723
	for freebsd-questions@freebsd.org; Mon, 4 Dec 2006 17:42:23 +0200 (EET)
	(envelope-from a@zeos.net)
Date: Mon, 4 Dec 2006 17:42:23 +0200
From: a@zeos.net
To: freebsd-questions@freebsd.org
Message-ID: <20061204154222.GA636@host.my.domain>
Mail-Followup-To: freebsd-questions@freebsd.org
References: <20061203174849.GA4561@host.my.domain>
	<44ejrfptqh.fsf@be-well.ilk.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <44ejrfptqh.fsf@be-well.ilk.org>
User-Agent: mutt-ng/devel-r804 (FreeBSD)
Subject: Re: How does my computer work with an empty arp table?
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 04 Dec 2006 15:43:59 -0000

On Mon, Dec 04, 2006 at 10:26:46AM -0500, Lowell Gilbert wrote:
> a@zeos.net writes:
> 
> > My computer is connected to ISP via ADSL and works properly.
> >
> > I typed
> >
> > arp -a
> >
> > and saw an empty table, although I pinged successfully an Internet host
> > one second ago.
> >
> > How does it work?
> >
> > ------------------------------------------------------------
> >
> > $ ifconfig
> > rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> > 	options=8<VLAN_MTU>
> > 	inet6 fe80::202:44ff:fe92:1875%rl0 prefixlen 64 scopeid 0x1 
> > 	inet 192.168.1.2 netmask 0xffffff00 broadcast 192.168.1.255
> > 	ether 00:02:44:92:18:75
> > 	media: Ethernet autoselect (100baseTX <full-duplex>)
> > 	status: active
> > lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
> > 	inet6 ::1 prefixlen 128 
> > 	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x2 
> > 	inet 127.0.0.1 netmask 0xff000000 
> > ng0: flags=88d1<UP,POINTOPOINT,RUNNING,NOARP,SIMPLEX,MULTICAST> mtu 1492
> > 	inet6 fe80::202:44ff:fe92:1875%ng0 prefixlen 64 scopeid 0x3 
> > 	inet 91.124.65.146 --> 195.5.5.161 netmask 0xffffffff 
> 
> Maybe you are connected to your service provider by PPP-over-Ethernet?
> In that case, the PPP link (which doesn't need ARP) is your next-hop
> to the Internet, rather than the modem on the Ethernet link.

Yes, you are right, I forgot about PPP. Many thanks.