<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:monospace;font-size:small"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Nov 13, 2019 at 4:35 PM Toke Høiland-Jørgensen <<a href="mailto:toke@toke.dk">toke@toke.dk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">"Rodney W. Grimes" <<a href="mailto:4bone@gndrsh.dnsmgr.net" target="_blank">4bone@gndrsh.dnsmgr.net</a>> writes:<br>
<br>
>> -t is the TOS value; so those two happen to correspond to ECT(1) and<br>
>> ECT(0); and as you can see they go two different paths. Which would be<br>
>> consistent with the SYN going one way and the data packets going<br>
>> another.<br>
><br>
> Perhaps Old enough that maybe they are treating that as TOS byte?<br>
><br>
> Looks like you have nailed it though, someone has a broken hash.<br>
<br>
Yup, seems like it. Posted a writeup to the NANOG list in response to<br>
the guy asking; it hasn't showed up in the archive, though, so I guess<br>
it's still in the moderation queue.<br>
<br>
I think I'll write the whole thing up as a blog post as well, once it's<br>
resolved. I'll see if I can get them to tell me which router make and<br>
model is doing this.<br>
<br>
Thanks everyone who helped with ideas etc! :)<br>
<br></blockquote><div><br></div><div><div class="gmail_default" style="font-family:monospace;font-size:small">great! You'll get a free subscription for a full year!</div><br></div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
-Toke<br>
</blockquote></div></div>