From owner-freebsd-current@freebsd.org Mon Mar 8 22:28:54 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 B2B5C55B626 for ; Mon, 8 Mar 2021 22:28:54 +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 4DvY0P58HPz3s3j for ; Mon, 8 Mar 2021 22:28:53 +0000 (UTC) (envelope-from lars@gustik.eu) Received: from troy.gustik.eu (localhost [IPv6:::1]) by troy.gustik.eu (Postfix) with ESMTP id 370A62ADCD6; Mon, 8 Mar 2021 23:28:52 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=gustik.eu; s=troy; t=1615242532; bh=YVhx7YJnAEcgOPJgVG4SDOFTzImLgITyNapvWimoBiw=; h=Subject:From:To:Cc:Date:In-Reply-To:References; b=ORRejA8JjMuG5xlM+q/aJgEafGMb6pjO8PSpw2OFjkXra/V5UMVSSGSXvL86I7DIT vksWMFxNCjJSJySyCYavr1srVoWCiBeObYjyOYzG39DBw8BT5Ktt28UBKwGZz/UCPi mu/dMzyXfeNwBqoapdfOhoD54Ll6cqYMKhpo6bks= Received: from romy.j20.helspy.pw ([2a01:c844:241d:bf20:4767:2cb8:97e4:8e2d]) by troy.gustik.eu with ESMTPSA id PnfJCiSlRmBKDQAADR3MKA (envelope-from ); Mon, 08 Mar 2021 23:28:52 +0100 Message-ID: <81ffb5784c66441bf5fb399c12b2b06786cc8f35.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 23:28:56 +0100 In-Reply-To: References: <2a8d7089955ca70cd4e0e644aef988ca4a9019e3.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: 4DvY0P58HPz3s3j X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gustik.eu header.s=troy header.b=ORRejA8J; 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 22:28:54 -0000 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