Fwd: [SOLVED] re(4) incorrect checksum

Pietro Cerutti pietro.cerutti at gmail.com
Thu Jan 11 12:00:20 UTC 2007

On 1/11/07, Bernd Walter <ticso at cicely12.cicely.de> wrote:
> On Thu, Jan 11, 2007 at 11:51:51AM +0100, Pietro Cerutti wrote:
> > Hi lists,
> > ifconfig re0 -txcsum -rxcsum solved the problem....
> >
> > Anyway, is this a bug in the driver or in the interface itself?
> That is how checksum offloading works.
> tcpdump can't see a correct checksum, because it is not calculated
> by the kernel and left for the hardware.

Yes, I got it.

> However checksum offloading is broken for re(4) based cards, therefor
> it is disabled by default.

I don't think so.... at least, I did nothing to enable it, but it were
indeed enabled (RXCSUM,TXCSU showed up in the options field shown by

> --
> B.Walter                http://www.bwct.de      http://www.fizon.de
> bernd at bwct.de           info at bwct.de            support at fizon.de

Pietro Cerutti
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