From owner-freebsd-net@freebsd.org Thu Mar 18 20:09:38 2021 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 0C0565AB495 for ; Thu, 18 Mar 2021 20:09:38 +0000 (UTC) (envelope-from tuexen@freebsd.org) Received: from drew.franken.de (mail-n.franken.de [193.175.24.27]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.franken.de", Issuer "Sectigo RSA Domain Validation Secure Server CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4F1dR56STnz4hJN for ; Thu, 18 Mar 2021 20:09:37 +0000 (UTC) (envelope-from tuexen@freebsd.org) Received: from [IPv6:2a02:8109:1140:c3d:b916:ac9d:67ca:1dbe] (unknown [IPv6:2a02:8109:1140:c3d:b916:ac9d:67ca:1dbe]) (Authenticated sender: macmic) by mail-n.franken.de (Postfix) with ESMTPSA id 93DCC762A0D29; Thu, 18 Mar 2021 21:09:35 +0100 (CET) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.60.0.2.21\)) Subject: Re: Severe IPv6 TCP transfer issues on 13.0-RC1 and RC2 From: Michael Tuexen In-Reply-To: <5753280.1HxCrU2fYu@thinkbook> Date: Thu, 18 Mar 2021 21:09:34 +0100 Cc: freebsd-net@freebsd.org Content-Transfer-Encoding: quoted-printable Message-Id: <9D504CF5-BF17-439F-9298-E743D9566691@freebsd.org> References: <5753280.1HxCrU2fYu@thinkbook> To: Blake Hartshorn X-Mailer: Apple Mail (2.3654.60.0.2.21) X-Spam-Status: No, score=-2.9 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=disabled version=3.4.1 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on mail-n.franken.de X-Rspamd-Queue-Id: 4F1dR56STnz4hJN X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org; none X-Spamd-Result: default: False [0.00 / 15.00]; local_wl_from(0.00)[freebsd.org]; ASN(0.00)[asn:680, ipnet:193.174.0.0/15, country:DE] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Mar 2021 20:09:38 -0000 > On 15. Mar 2021, at 12:56, Blake Hartshorn = wrote: >=20 > The short version, when I use FreeBSD 13, delivering data can take 5 = minutes for 1MB over SSH or HTTP when using IPv6. This problem does not = happen with IPv4. I installed FreeBSD 12 and Linux on that same device, = neither had the problem. >=20 > Did some troubleshooting with Linode, have ultimately ruled the = network itself out at this point. When the server is on FreeBSD 13, it = can download quickly over IPv6, but not deliver. Started investigating = after noticing my SSH session was lagging when cat'ing large files or = running builds. This problem even occurs between VMs in the same = datacenter. I generated a 1MB file of base64 garbage served by nginx for = testing. IPv6 is being configured by SLAAC and on both 12 and 13 = installs was setup by the installer. Linode uses Linux/KVM hosts for = their virtual machines so it's running on that virtual adapter. >=20 > I asked on the forums, another user recommended going to the mailing = lists instead. Does anyone know if config settings need to be different = on 13? Did I maybe just find a real issue? I can provide any requested = details. Thanks! I was able to reproduce the issue locally. A fix is under review: https://reviews.freebsd.org/D29331 Best regards Michael >=20 >=20 > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"