Date: Tue, 16 Mar 2021 09:16:15 +0100 From: tuexen@freebsd.org To: Blake Hartshorn <contact@blakehartshorn.com> Cc: freebsd-net@freebsd.org Subject: Re: Severe IPv6 TCP transfer issues on 13.0-RC1 and RC2 Message-ID: <E1346D9D-F1E0-4ABC-89D6-33BC77705771@freebsd.org> In-Reply-To: <5753280.1HxCrU2fYu@thinkbook> References: <5753280.1HxCrU2fYu@thinkbook>
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> On 15. Mar 2021, at 12:56, Blake Hartshorn = <contact@blakehartshorn.com> 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! Could you prove a .pcap tracefile, one from the sender, one from the = recevier, of a TCP/IPv6 connection, which doesn't work as expected. For example, use = your 1MB base64 garbage transfer. Best regardes 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"
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