On 7/30/06, Dan Shoop <email@hidden> wrote:
At 6:02 AM +1000 7/31/06, Nigel Kersten wrote:
Does anyone know for sure whether the G5 Xserve gigabit interfaces do TCP checksum offloading?
Showing checksum errors? That's normally a sign of checksum offloading in the NI.
To answer your question , I believe so. I think all [modern] Mac Ethernet NI's do, in fact most Ethernet NI's do.
But not the MacBook Air, FWIW. Using Wireshark to speak HTTPS over the wire to a fixed destination site, an Xserve Late 2006 model and a MacPro Early 2008 model both running Wireshark report checksum offload errors. But a MacBook Air attempting to speak HTTPS to the same site with the same version of Wireshark with the same Wireshark settings used when tested with the Xserve and the MacPro do not report the checksum offload error (checked with both the MacBook Air using its built-in WiFi and with an Apple USB-to-Ethernet adapter).
Regards,
Serg
--
-dhan
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