Wireshark · Ethereal-users: Re: [Ethereal-users] incorrect tcp checksums

["Martin Regner" <martin.regner@xxxxxxxxx>]

>On Mon, Oct 14, 2002 at 07:21:24PM +0200, Michael Tuexen wrote:
>> I'm using Mac OS X and when sniffing ALL TCP checksum of
>> outgoing packets are wrong. It is because this calculation
>> is done by the NIC. If I disable this feature, I see also
>> the outgoing packets with correct checksums. Maybe Windows
>> does a similiar optimization.
>

Guy Harris wrote:
>Solaris does so with Sun's gigabit Ethernet card, at least.  I don't
>know whether it does so with any lower-speed cards.

>

I have similar behaviour in the snoop captures I've made on Solaris (non-gigabit Ethernet cards).