From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk1-x72d.google.com (mail-qk1-x72d.google.com [IPv6:2607:f8b0:4864:20::72d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 351B03BA8E for ; Mon, 1 Oct 2018 13:22:50 -0400 (EDT) Received: by mail-qk1-x72d.google.com with SMTP id g20-v6so7480315qke.9 for ; Mon, 01 Oct 2018 10:22:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=R5rd1PsEnszJtk33Et9uuXKZTumQMGa+mFzAtXjC6pE=; b=KKKy+mOzYNSw2ALLZw1n/fGGQF7XnC6dSy0v1HCSvjr4IKpBk7LRc7VJ4c0MkisWZt ptfBgQaGo3BV9v6C+eDWJxxILEwNKcYhnyfGSkaihNQx9C8z/q6IU39YEx0qtkatBaVc 0KW+CV1uOvGRODlzMwoM8qfc0zdN2eaDJ7FmdsDk8Crw8jEpLrX+ytGhUnJEiyYg5Xwp ZLk+LYl4ZM+ZGXaKOblHJI1Oc1e7Kw3VNiIopARkntoP5EAJfSqC+aVnoGYG55brcjxU pCnjx6St/XaCYWyi+dsggat5dfAbzAwOfMgs5EAqyzfqDaoYfwmYIKAiAjvvG8GXNCKh pllg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=R5rd1PsEnszJtk33Et9uuXKZTumQMGa+mFzAtXjC6pE=; b=TbG6xvkijpSkBWPg75a6T+m3RJuNkvuFSRdyUB4MF2oV9LN13dBSXJUz07j/f4kfnM hmnZVVibgBKue+s/qFbjHOzWYJ0y22FZfwi4ZMGQwD/lmkG6KVHpMvtGPLEAF7vXP3IU aUQVDw7ptq9YxwYeg67Q3UM5ZfplqoaEJbLvS3NVugpcCYdeC8/jywaqMVYP5kkuC6bP 4spq6LEaTc7ym8UgHvx2bHQYabYpFMhKZ9PzJPfx7MJWRFYfar4Mdx7ukFdzTqBnplpa MKcmeNQwUnxUsW2kUuVWdB1cZ3V0PcU4xxUmnK3qyWWMT44tmP9l43ymMAvRjybWeMt4 QP6Q== X-Gm-Message-State: ABuFfogsIAgphnBOhJOvZKMt3nL+iK9RcavOECjjOTF7+tQYzf336X/x DVCNiOP4hF3E1TzLoLOTvaM6ZirPWgEWIQ/mo5w= X-Google-Smtp-Source: ACcGV61IkX5/3SDCWPP7Vfp+0SceR3NnGAFWd2sUo6wO8Qda2ZxiM4bp8V9guF5Lx7tmQe5qZGDw01aOts2geOiVMMo= X-Received: by 2002:a37:185f:: with SMTP id j92-v6mr2339799qkh.65.1538414569691; Mon, 01 Oct 2018 10:22:49 -0700 (PDT) MIME-Version: 1.0 References: <32226.1538414011@localhost> In-Reply-To: <32226.1538414011@localhost> From: Dave Taht Date: Mon, 1 Oct 2018 10:22:38 -0700 Message-ID: To: Michael Richardson Cc: Mikael Abrahamsson , cerowrt-devel@lists.bufferbloat.net Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Cerowrt-devel] ipv6 on comcast with 18.06.1 X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 01 Oct 2018 17:22:50 -0000 On Mon, Oct 1, 2018 at 10:13 AM Michael Richardson wrote= : > > > Dave Taht wrote: > > hmm... bad udp checksum??? > > With some capture mechanisms, tcpdump gets bogus values because the hardw= are > did the checksums. I wouldn't imagine that we have hardware checksum off= load > on openwrt devices, but could be. > > Or it's a real issue. Checksums were good on the mips device I have not getting internal dhcpv6pd= , (dhcpv6 and slaac work on the external interface)... but I didn't check them all, and it's possible the pool is exhausted. Wasn't planning on doing this today! Hoped it was a firewall rule, frankly.= :( > > > :/tmp# 09:12:17.404257 IP6 (flowlabel 0xdfff4, hlim 1, next-header = UDP > > (17) payload length: 159) fe80::20d:b9ff:fe43:a06c.546 > ff02::1:2.= 547: > > [bad udp cksum 0x58f4 -> 0xc4a1!] On Mon, Oct 1, 2018 at 9:12 AM D= ave > > Taht wrote: > > Did you capture with -i device, or -i any? device. > > -- > ] Never tell me the odds! | ipv6 mesh netwo= rks [ > ] Michael Richardson, Sandelman Software Works | network archite= ct [ > ] mcr@sandelman.ca http://www.sandelman.ca/ | ruby on rails= [ > --=20 Dave T=C3=A4ht CEO, TekLibre, LLC http://www.teklibre.com Tel: 1-669-226-2619