From owner-freebsd-current@freebsd.org Mon Mar 8 22:38:09 2021 Return-Path: Delivered-To: freebsd-current@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 7B5A255B9AC for ; Mon, 8 Mar 2021 22:38:09 +0000 (UTC) (envelope-from lars@gustik.eu) Received: from troy.gustik.eu (troy.gustik.eu [165.227.162.104]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4DvYC45PZZz3sgq for ; Mon, 8 Mar 2021 22:38:08 +0000 (UTC) (envelope-from lars@gustik.eu) Received: from troy.gustik.eu (localhost [IPv6:::1]) by troy.gustik.eu (Postfix) with ESMTP id 298852ADCD6; Mon, 8 Mar 2021 23:38:07 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=gustik.eu; s=troy; t=1615243087; bh=k6HZGp04D0ahzqjnoUsHIkSufIALM5jpjb/dOCdqoZE=; h=Subject:From:To:Cc:Date:In-Reply-To:References; b=hvjWxnyRSDburFDmHP9xJZ0KOlvaZ0U8HAV4hd94ObxI0oY9rbKB+ngSSnJKsj7o2 s8zOE7XDiMEpP4XDW7z04Z9maH4mvVkgVZDoL4kgDk6V/thnTI4DiUgwpL4zI/G/K5 siuynjnXn1GVmNkjR0qEgSH2Lm2kzrabaVStKDWA= Received: from romy.j20.helspy.pw ([2a01:c844:241d:bf20:4767:2cb8:97e4:8e2d]) by troy.gustik.eu with ESMTPSA id 8iacB0+nRmC6DQAADR3MKA (envelope-from ); Mon, 08 Mar 2021 23:38:07 +0100 Message-ID: <68de2b7067f40ba7adf344a18dff12840f7efd35.camel@gustik.eu> Subject: Re: FreeBSD 13.0-RC1 ethertype IPv6 (0x86dd), length 2942 on 1500 MTU From: Lars Schotte To: Ryan Stone Cc: FreeBSD Current Date: Mon, 08 Mar 2021 23:38:11 +0100 In-Reply-To: <81ffb5784c66441bf5fb399c12b2b06786cc8f35.camel@gustik.eu> References: <2a8d7089955ca70cd4e0e644aef988ca4a9019e3.camel@gustik.eu> <81ffb5784c66441bf5fb399c12b2b06786cc8f35.camel@gustik.eu> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5 (3.28.5-16.el8) Mime-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 4DvYC45PZZz3sgq X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gustik.eu header.s=troy header.b=hvjWxnyR; dmarc=none; spf=pass (mx1.freebsd.org: domain of lars@gustik.eu designates 165.227.162.104 as permitted sender) smtp.mailfrom=lars@gustik.eu X-Spamd-Result: default: False [-3.00 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_SPF_ALLOW(-0.20)[+mx:c]; MV_CASE(0.50)[]; RCVD_COUNT_THREE(0.00)[3]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[gustik.eu:+]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_HAM_SHORT(-1.00)[-1.000]; FREEMAIL_TO(0.00)[gmail.com]; FROM_EQ_ENVFROM(0.00)[]; RCVD_TLS_LAST(0.00)[]; RBL_DBL_DONT_QUERY_IPS(0.00)[165.227.162.104:from]; ASN(0.00)[asn:14061, ipnet:165.227.160.0/20, country:US]; MIME_TRACE(0.00)[0:+]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[gustik.eu:s=troy]; FREEFALL_USER(0.00)[lars]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[gustik.eu]; SPAMHAUS_ZRD(0.00)[165.227.162.104:from:127.0.2.255]; TO_MATCH_ENVRCPT_SOME(0.00)[]; MAILMAN_DEST(0.00)[freebsd-current] X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Mar 2021 22:38:09 -0000 Oh, I am afraid I have to correct myself once again. I was expecting the change to take effect immediately, however, after closing all connections to the system, it indeed seems to have helped to remove TSO6. Thanks for the quick fix. However, I will keep an eye on it, I will do more testing tomorrow. On Mon, 2021-03-08 at 23:28 +0100, Lars Schotte wrote: > Hi, > thanks for you fast reaction. > > I was sceptical about this, since it contrary to my expectations > indeed > does affect IPv4 as well, but I tried it anyway and the result is > NEGATIVE. > > Removing TSO6 does not help with it, it still spills out crazy sized > Ethernet frames of ~4000 and so on. > > On Mon, 2021-03-08 at 17:22 -0500, Ryan Stone wrote: > > Hi Lars, > > > > Do you see the TSO6 option enabled on your vtnet interface? Do you > > see normal packet sizes if you disable it with "ifconfig vtnet0 > > -tso6"? Does it actually fix your IPv6 issue? -- Lars Schotte Mudroňova 13 92101 Piešťany