Unusual fxp behaviour with link0 flag

Doug White dwhite at gumbysoft.com
Tue Feb 17 10:52:27 PST 2004


On Sun, 15 Feb 2004, Bruce M Simpson wrote:

> It might help if I mentioned what it was! Truncated IP datagrams. That is,
> only the first 40 bytes or so of every packet were making it through. This
> had the effect that I could ping the box, but TCP segments were mysteriously
> Going Nowhere, and tcpdump revealed a lot of [|ip].

tcpdump shows the [|foo] when you're using the default snarflen and it
thinks there's more data to look at. The default snarflen is 68.  But TCP
stuff should have been ID'd as [|tcp] and not [|ip], so I suppose it had
the intended effect :)

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite at gumbysoft.com          |  www.FreeBSD.org


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