From owner-freebsd-net@freebsd.org Fri Mar 16 09:56:10 2018 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id F03B2F607EC for ; Fri, 16 Mar 2018 09:56:09 +0000 (UTC) (envelope-from bu7cher@yandex.ru) Received: from forward103p.mail.yandex.net (forward103p.mail.yandex.net [IPv6:2a02:6b8:0:1472:2741:0:8b7:106]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "forwards.mail.yandex.net", Issuer "Yandex CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 753CF76378 for ; Fri, 16 Mar 2018 09:56:09 +0000 (UTC) (envelope-from bu7cher@yandex.ru) Received: from mxback10o.mail.yandex.net (mxback10o.mail.yandex.net [IPv6:2a02:6b8:0:1a2d::24]) by forward103p.mail.yandex.net (Yandex) with ESMTP id B345E2180DAE; Fri, 16 Mar 2018 12:55:04 +0300 (MSK) Received: from smtp1p.mail.yandex.net (smtp1p.mail.yandex.net [2a02:6b8:0:1472:2741:0:8b6:6]) by mxback10o.mail.yandex.net (nwsmtp/Yandex) with ESMTP id AGwXg5X8Lv-t49aKWjF; Fri, 16 Mar 2018 12:55:04 +0300 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex.ru; s=mail; t=1521194104; bh=9gM2dbtcaSIvcTbPzrYLdRXHdDoYqLmSZtGuT2FrQE4=; h=Subject:To:References:From:Message-ID:Date:In-Reply-To; b=T7DayfynrYV8TNc7DA3b3lp/ntDj7g4sHrlFz8tCK5ufhJ92whAsya8U+hpVY6YKX gqtujlW5JQJuVwTAMXMNfXI8I60vUqLFvPCS4j5kRdcSqaoaqFlPnJVbxt3a7Uz4MM tYgON+b5B74AzMhdmDcjGHWSFQht25IU+FC60TS8= Received: by smtp1p.mail.yandex.net (nwsmtp/Yandex) with ESMTPSA id k3tBKixUSB-t34ehJED; Fri, 16 Mar 2018 12:55:03 +0300 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client certificate not present) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex.ru; s=mail; t=1521194103; bh=9gM2dbtcaSIvcTbPzrYLdRXHdDoYqLmSZtGuT2FrQE4=; h=Subject:To:References:From:Message-ID:Date:In-Reply-To; b=sxBbTyqh5zgVMLQIfMG3veAkMoYRFXy6cAcDIYcBQ2FWCMjM9SvBa8/WpoWZKc5XV P/VgCYJi9lhy9LmVmP/cs3bsH0EC6PTQJm99Kwd5HgvI0gSo3JM0Ud+iYbJ97b2y8Q 2XaJp5JB0z0MiBhXMWEDsgGDTOhI3WQQem4GjeZI= Authentication-Results: smtp1p.mail.yandex.net; dkim=pass header.i=@yandex.ru Subject: Re: Does FreeBSD do proactive ARP refresh? To: sthaug@nethelp.no, freebsd-net@FreeBSD.org References: <20180315.210552.74686746.sthaug@nethelp.no> From: "Andrey V. Elsukov" Openpgp: id=E6591E1B41DA1516F0C9BC0001C5EA0410C8A17A Message-ID: <1fba4f44-9308-19b8-973a-645869ff95ee@yandex.ru> Date: Fri, 16 Mar 2018 12:53:46 +0300 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: <20180315.210552.74686746.sthaug@nethelp.no> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="ThzTrVEqB0T5UJuMTfiOQrRT0OgQBp1GP" X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 16 Mar 2018 09:56:10 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --ThzTrVEqB0T5UJuMTfiOQrRT0OgQBp1GP Content-Type: multipart/mixed; boundary="e0tiiI74MhjWTSdRZYggp3ZKHmPHYEnHX"; protected-headers="v1" From: "Andrey V. Elsukov" To: sthaug@nethelp.no, freebsd-net@FreeBSD.org Message-ID: <1fba4f44-9308-19b8-973a-645869ff95ee@yandex.ru> Subject: Re: Does FreeBSD do proactive ARP refresh? References: <20180315.210552.74686746.sthaug@nethelp.no> In-Reply-To: <20180315.210552.74686746.sthaug@nethelp.no> --e0tiiI74MhjWTSdRZYggp3ZKHmPHYEnHX Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 15.03.2018 23:05, sthaug@nethelp.no wrote: > My idea here is that as long as you have a valid ARP entry, it should > be possible to refresh the ARP entry *and* continue sending traffic > (with no packet drops) - i.e. the goal is to completely avoid the > drops I'm currently seeing on every ARP refresh. >=20 Can you show your config and stats after the test? # sysctl net.link.ether # netstat -sp arp # netstat -sp ip # netstat -sp udp --=20 WBR, Andrey V. Elsukov --e0tiiI74MhjWTSdRZYggp3ZKHmPHYEnHX-- --ThzTrVEqB0T5UJuMTfiOQrRT0OgQBp1GP Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEzBAEBCAAdFiEE5lkeG0HaFRbwybwAAcXqBBDIoXoFAlqrlCoACgkQAcXqBBDI oXqnKAgAkXm7MqMKjgrSdGKeOstnPZz4ew6F9z6pQyLME9ezSHCP945/oxEoV+yK QC0I7Sl2kLAAD8xFtiPgGhz6lDtqRIQCavBS6DEA6xrzTNkafzF6nNm8mPhvrNHl n/KaSmlPnF0AKCbbmNkisnMpy2PSDflJ8dVh1ovkjawiYOZ/NkpXnwC4IISlBQ5q xIx2Lp+GqsCc1jtqTqzpnRGROTt/FrAPRbAxuY8fY82Ih0ggZlTaCHT7s+k6JhZh +93mY7AhRUhDUjha36t1jCmpd0TJLaRCoo2GKuL0ByzkZC4NM4ZZ2NhL4UkH6I7J 4u1wkmCzeqRVLSYDfQBCFeMuLAlXiw== =Xr05 -----END PGP SIGNATURE----- --ThzTrVEqB0T5UJuMTfiOQrRT0OgQBp1GP--