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DIR:OUT; SFP:1102; SCL:1; SRVR:BL2PR01MB1875; H:BL2PR01MB1890.prod.exchangelabs.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: wpi.edu does not designate permitted sender hosts) x-microsoft-antispam-message-info: 0UZHx/xpwCP4agT8y40Hknib4jHvPY4PMKKK/RPB9JL15TpFNbjCMjAfEWcwb6KyCQowdQK0ih/h1zzJB6IcgxpToSf91cDmMx/q3oyda20KuExsqSSnzw8pwbqvWJy8D1unb6KKa942tk1Ob5uhbBxUueQ1msPfFvhDWlNpZ6qx9zkk1ErevR5WH0DO3JOy1cj7J4i37AXnykNR15FNTwvFzn5gcQ1dTgjMKeK0mkv7hMKlo+yklwTQRBEbjqqfOAsyG0CDxMCa021zqKRdh+PCw5A/e55KQdDobT571lMcCiIhwFC1Be4STrAe4hpZxHANd0ZiIOOUeekQ4g2zG7HUkXxsB5Se3hniUVMOhVY= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="us-ascii" Content-ID: <31C6AE8AB4C0014B9D803575CD7106B7@prod.exchangelabs.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: wpi.edu X-MS-Exchange-CrossTenant-Network-Message-Id: c5595d9c-d40e-4196-e9b7-08d627bb1d9d X-MS-Exchange-CrossTenant-originalarrivaltime: 01 Oct 2018 16:29:53.6005 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 589c76f5-ca15-41f9-884b-55ec15a0672a X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL2PR01MB1875 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 16:29:57 -0000 Is udp checksum offload enabled? If so, tcpdump/wireshark won't see the actual checksum and assume it is bad. On Mon, Oct 01, 2018 at 09:12:57AM -0700, Dave Taht wrote: > hmm... bad udp checksum??? >=20 > :/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 Dave Taht wrote: > > > > On Mon, Oct 1, 2018 at 8:58 AM Dave Taht wrote: > > > > > > Here you go! Going to go look at the firewall rules in a sec.... > > > > I changed the rules to allow 547 and 546, no difference. I even > > flushed the ipv6tables rules entirely, > > and I'm running without that for a while. I can certainly imagine > > comcast's dhcpv6 server giving up on me.... > > > > It's nice to know, btw, someone is still messing with homenet. Having > > zero funding for > > too many years burned me out on even trying. But I expected ipv6 to > > keep working without > > any more help from me! :( > > > > > On Mon, Oct 1, 2018 at 8:45 AM Mikael Abrahamsson = wrote: > > > > > > > > On Mon, 1 Oct 2018, Dave Taht wrote: > > > > > > > > > Sigh. Once upon a time I used to test this stuff on comcast. So I > > > > > finally got around to deploying > > > > > a new 18.06 gateway and ipv6 is busted with comcast. > > > > > > > > Can you please email me output from "tcpdump -n -vvv -i port = 546 or > > > > port 547 or icmp6" as your WAN is trying to get DHCPv6-PD ? Or if y= ou dump > > > > that to a pcap and email it to me (or make it available somewhere f= or me > > > > to download). > > > > > > > > I have 18.06.1 working with homenet on WRT1200AC,dual uplinks (two > > > > different vlans on WAN), getting dual stack from both ISPs, /56 fro= m both, > > > > and both are announced out on LAN. I even configured bidirectional = SQM > > > > with CAKE on each uplink (250/50 and 250/100 respectively) and it s= eems to > > > > do the right thing.