checksumming on a DP83820

Christian Widmer (cwidmer@iiic.ethz.ch)
Wed, 15 Aug 2001 00:49:00 +0200


does anybody know the DP83820 which is used on the GigaNix NIC and
can awnser me the folloing question or knows where to ask.

the DP83820 supports IP/UDP/TCP checksumming. the chip docu say you
can mark the transmit descriptior when it contains a IP, UDP, TCP header.
1) is it possible for udp to spread multiple descriptios and the checksum
will be calculated?
2) if so can it be bigger than a jumboframe?

i don't find any awnsers in the chip docu from national. i think 1) could be
possible but 2) not. am i right?

thanks
chris

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