From owner-freebsd-stable@FreeBSD.ORG Sat Sep 30 19:33:46 2006 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2716316A407 for ; Sat, 30 Sep 2006 19:33:46 +0000 (UTC) (envelope-from m.seaman@infracaninophile.co.uk) Received: from smtp.infracaninophile.co.uk (ns0.infracaninophile.co.uk [81.187.76.162]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6F9A143D46 for ; Sat, 30 Sep 2006 19:33:44 +0000 (GMT) (envelope-from m.seaman@infracaninophile.co.uk) Received: from [IPv6:::1] (localhost [IPv6:::1]) by smtp.infracaninophile.co.uk (8.13.8/8.13.8) with ESMTP id k8UJXILT065946 for ; Sat, 30 Sep 2006 20:33:19 +0100 (BST) (envelope-from m.seaman@infracaninophile.co.uk) Authentication-Results: smtp.infracaninophile.co.uk from=m.seaman@infracaninophile.co.uk; sender-id=softfail; spf=softfail X-SenderID: Sendmail Sender-ID Filter v0.2.14 smtp.infracaninophile.co.uk k8UJXILT065946 Message-ID: <451EC677.6000404@infracaninophile.co.uk> Date: Sat, 30 Sep 2006 20:33:11 +0100 From: Matthew Seaman Organization: Infracaninophile User-Agent: Thunderbird 1.5.0.7 (X11/20060915) MIME-Version: 1.0 To: freebsd-stable@freebsd.org X-Enigmail-Version: 0.94.0.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------enigACC907932DDC15274EF8F89B" X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-2.0.2 (smtp.infracaninophile.co.uk [IPv6:::1]); Sat, 30 Sep 2006 20:33:39 +0100 (BST) X-Virus-Scanned: ClamAV 0.88.4/1952/Sat Sep 30 15:35:55 2006 on happy-idiot-talk.infracaninophile.co.uk X-Virus-Status: Clean X-Spam-Status: No, score=-2.6 required=5.0 tests=AWL,BAYES_00, DKIM_POLICY_TESTING,NO_RELAYS autolearn=ham version=3.1.5 X-Spam-Checker-Version: SpamAssassin 3.1.5 (2006-08-29) on happy-idiot-talk.infracaninophile.co.uk Subject: Disappearing IPv6 default route X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 30 Sep 2006 19:33:46 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigACC907932DDC15274EF8F89B Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: quoted-printable Dear list, I've had IPv6 connectivity for some years via an IPv6 in IPv4 gif tunnel courtesy of my ISP. However, about a week ago, when I upgraded to 6.2-PRERELEASE, I noticed it had mysteriously stopped working. (It may h= ave died before last week though; but that is the probable time) So this weekend I set out to find out why. After much head scratching, I discovered that the IPv6 default route was not present on the system. If I added it back manually, voil=E0: IPv= 6 connectivity back again ... for a few seconds. This is completely reproducible: happy-idiot-talk:~:% sudo route add -inet6 default -interface gif0 ; ping= 6 clueless.aaisp.net.uk add net default: gateway gif0 PING6(56=3D40+8+8 bytes) 2001:8b0:151:1::1 --> 2001:8b0:0:81::51bb:5115 16 bytes from 2001:8b0:0:81::51bb:5115, icmp_seq=3D0 hlim=3D61 time=3D32.= 221 ms 16 bytes from 2001:8b0:0:81::51bb:5115, icmp_seq=3D1 hlim=3D61 time=3D29.= 856 ms 16 bytes from 2001:8b0:0:81::51bb:5115, icmp_seq=3D2 hlim=3D61 time=3D29.= 560 ms 16 bytes from 2001:8b0:0:81::51bb:5115, icmp_seq=3D3 hlim=3D61 time=3D30.= 348 ms 16 bytes from 2001:8b0:0:81::51bb:5115, icmp_seq=3D4 hlim=3D61 time=3D28.= 957 ms 16 bytes from 2001:8b0:0:81::51bb:5115, icmp_seq=3D5 hlim=3D61 time=3D30.= 626 ms 16 bytes from 2001:8b0:0:81::51bb:5115, icmp_seq=3D6 hlim=3D61 time=3D29.= 384 ms 16 bytes from 2001:8b0:0:81::51bb:5115, icmp_seq=3D7 hlim=3D61 time=3D31.= 815 ms ping6: sendmsg: No route to host ping6: wrote clueless.aaisp.net.uk 16 chars, ret=3D-1 ping6: sendmsg: No route to host ping6: wrote clueless.aaisp.net.uk 16 chars, ret=3D-1 ping6: sendmsg: No route to host ping6: wrote clueless.aaisp.net.uk 16 chars, ret=3D-1 ping6: sendmsg: No route to host ping6: wrote clueless.aaisp.net.uk 16 chars, ret=3D-1 ping6: sendmsg: No route to host ping6: wrote clueless.aaisp.net.uk 16 chars, ret=3D-1 ^C --- clueless.aaisp.net.uk ping6 statistics --- 13 packets transmitted, 8 packets received, 38.5% packet loss round-trip min/avg/max/std-dev =3D 28.957/30.346/32.221/1.088 ms After 8 pings, the default route disappears. tcpdump shows no other traf= fic to/from the tunnel end-point than the pings and responses. I can't find = anything similar reported elsewhere on the 'net. Any clues gratefully received. OS Version: happy-idiot-talk:~:% uname -a=20 FreeBSD happy-idiot-talk.infracaninophile.co.uk 6.2-PRERELEASE FreeBSD 6.= 2-PRERELEASE #9: Fri Sep 29 01:08:43 BST 2006 root@happy-idiot-talk.i= nfracaninophile.co.uk:/usr/obj/usr/src/sys/HAPPY-IDIOT-TALK i386 IPv6 related stuff from rc.conf: gif_interfaces=3D"gif0" gifconfig_gif0=3D"81.187.76.162 81.187.81.6" ipv6_enable=3D"YES" ipv6_defaultrouter=3D"-interface gif0" ipv6_default_interface=3D"gif0" ipv6_ifconfig_gif0=3D"2001:08b0:0151:0001::1 prefixlen 64" ipv6_gateway_enable=3D"YES" happy-idiot-talk:~:% ifconfig gif0=20 gif0: flags=3D8051 mtu 1280 tunnel inet 81.187.76.162 --> 81.187.81.6 inet6 fe80::240:5ff:fea5:8db7%gif0 prefixlen 64 scopeid 0x3=20 inet6 2001:8b0:151:1::1 prefixlen 64=20 Cheers, Matthew --=20 Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate Kent, CT11 9PW --------------enigACC907932DDC15274EF8F89B Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFHsZ+8Mjk52CukIwRCG1iAJ9ZePH7b7/jUyuzxVV0R/CdPvsD2gCgg+5Y B1hPtYyFYxZpox/DvUi6dns= =+gwx -----END PGP SIGNATURE----- --------------enigACC907932DDC15274EF8F89B--