[Cerowrt-devel] ipv6 on comcast with 18.06.1
mcr at sandelman.ca
Mon Oct 1 13:13:31 EDT 2018
Dave Taht <dave.taht at 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.
> :/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 at gmail.com> wrote:
Did you capture with -i device, or -i any?
] Never tell me the odds! | ipv6 mesh networks [
] Michael Richardson, Sandelman Software Works | network architect [
] mcr at sandelman.ca http://www.sandelman.ca/ | ruby on rails [
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