From: Dave Taht <dave.taht@gmail.com>
To: Michael Richardson <mcr@sandelman.ca>
Cc: Mikael Abrahamsson <swmike@swm.pp.se>,
cerowrt-devel@lists.bufferbloat.net
Subject: Re: [Cerowrt-devel] ipv6 on comcast with 18.06.1
Date: Mon, 1 Oct 2018 10:22:38 -0700 [thread overview]
Message-ID: <CAA93jw7ykGZ1syRqbUsu0j5firR-QyHUSBdEPm7z+m27KT9P9A@mail.gmail.com> (raw)
In-Reply-To: <32226.1538414011@localhost>
On Mon, Oct 1, 2018 at 10:13 AM Michael Richardson <mcr@sandelman.ca> wrote:
>
>
> Dave Taht <dave.taht@gmail.com> wrote:
> > hmm... bad udp checksum???
>
> With some capture mechanisms, tcpdump gets bogus values because the hardware
> did the checksums. I wouldn't imagine that we have hardware checksum offload
> 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 Dave
> > Taht <dave.taht@gmail.com> wrote:
>
> Did you capture with -i device, or -i any?
device.
>
> --
> ] Never tell me the odds! | ipv6 mesh networks [
> ] Michael Richardson, Sandelman Software Works | network architect [
> ] mcr@sandelman.ca http://www.sandelman.ca/ | ruby on rails [
>
--
Dave Täht
CEO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-669-226-2619
next prev parent reply other threads:[~2018-10-01 17:22 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-01 15:30 Dave Taht
2018-10-01 15:45 ` Mikael Abrahamsson
2018-10-01 15:58 ` Dave Taht
2018-10-01 16:12 ` Dave Taht
2018-10-01 16:12 ` Dave Taht
2018-10-01 16:29 ` Anderson, Charles R
2018-10-01 16:44 ` Dave Taht
2018-10-01 17:13 ` Michael Richardson
2018-10-01 17:22 ` Dave Taht [this message]
2018-10-01 19:07 ` Mikael Abrahamsson
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