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Joseph Mack PhD, High Performance Computing & Scientific Visualisation
LMIT, Supporting the EPA Research Triangle Park, NC 919-541-0007
Federal Contact - John B. Smith 919-541-1087 - smith.john@xxxxxxx
lvs-users-bounces+mack.joseph=epamail.epa.gov@xxxxxxxxxxxxxxxxxxxxxx
wrote on 03/11/2005 11:13:12 AM:
> > can you give me a reference? Which 2.6.x kernels have it?
>
> I honestly have no idea.
there's not a word about it in the 2.6.5 Documentation directories
(grep'ed for mtu, tunl, tunnel).
> I have LVS setup on a version of 2.4.20 and had to change
> the MTU values to prevent the problem.
>
> When I was investigating, I was told (by a non LVS bod)
> there is a bug in the IP Encapsulation code in most
> versions of the 2.4 kernel where by when negotiating the
> MTU for the IP tunnel it does not take the overhead of the
> tunnel into account.
this sounds like what we've got.
Still someone had to work out how to handle it in windows too.
> It is very difficult to reproduce. The bug only occurs if
> the packet is a very specific size. From my testing, even
> source and destination IP address makes a difference.
let's see how Casey did it
Joe
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