J?rgen Keil wrote: >> I'm using an Avaya PCMCIA NIC on my laptop with the pcwl driver. >> >> When I observe network traffic using WireShark 1.0.1, it shows all of my >> TCP and UDP packets have incorrect checksums with a message stating: >> >> maybe caused by "TCP checksum offload?" >> & >> maybe caused by "UDP checksum offload?" > > On which machine is wireshark running ? > On the laptop with the PCMCIA NIC / pcwl driver ? > > In this case it is the expected behavior that outgoing > packets don't have valid udp and tcp checksums, > if the nic is using hardware checksum support. > > If you run the packet trace software on a different > machine, the checksums should be ok for packets > transmitted by the pcwl driver. > -- > This message posted from opensolaris.org > _______________________________________________ > laptop-discuss mailing list > laptop-discuss at opensolaris.org
First of all, I appreciate the assistance. My laptop has the pcwl driver The machine out in the garage has the malo driver Running wireshark on both machines and initiating an ssh session shows that both NICs are sending and receiving packets with bad checksums. I ran the test again without putting the cards in promiscuous mode - no diff. .... Well, there ya go. I just tested it with tcpdump and all checksums are now showing up as correct. Who's right? My money's on tcpdump. So it appears WireShark has a glitch. Does this sound right? Thanks for your help, Cheers, Steve
