Re: Weird HTB behaviour in 2.6.17

Linux Advanced Routing and Traffic Control

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Hello,

On 7/28/06, Patrick McHardy <kaber@xxxxxxxxx> wrote:

Right, the "problem" is related to TCP segmentation offloading (or GSO
in current kernels). The card gets large chunks of data and is
responsible for creating MTU-sized packets, which essentially means
qdiscs get to see those large chunks of data. You can disable TSO
using ethtool (but it will cost you performance) or configure your
qdisc appropriately.

Thanks a lot. It was exactly that. I turned the tso off and HTB is
working properly.

How can I know the largest chunk of data the kernel sends to the card,
so that I can configure qdisc appropriately?

In the last post, Jake Altchill recommended using mtu 16500 in the
qdiscs, but I'm not sure whether that's a real or just a big number.

Regards.

--
Marlon
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