Actually only 2 device (PC + ethernet to serial) attaching to the the hub. I'll look into the MAC.
thanks. On Tue, Mar 10, 2009 at 8:08 PM, [email protected] <[email protected]> wrote: > Are there any other devices on the network? I'd expect your hardware is too > slow to keep up with full wire speed receiving and that's what you get with > a hub when there are many devices talking over the net (as with a hub you > get *every* packet, not only broadcast packets like you do with a switch). > > If you want to be able to work on a hub, you should try to filter out > packets that are not for you as quickly as possible. Most MACs have a filter > that only lets broadcast packets or packets with a specific target MAC to > the driver and discards all others. Enabling that should give the same > result with a hub and a switch. > > Aside from that, there are no specific issues known for lwIP with a hub, > but any problem you have appears more often the more packets you receive, I > guess. > > Simon > > > Bandu wrote: > >> Hi, >> I'm devloping ethernet to serial converter using lwip 1.3.0. >> When I'm using with a network switch, it connect fine and data transfer >> can do more than a week without any interruption. >> But when I plug it in to network hub, 10BaseT or 100BaseT (10BaseT is the >> worse), I got lots of problem. transmission delays, connection dropping from >> both lwip side and PC side. PC side i'm using TDI client driver. When use >> with network hub, the error starting to occurred within under 10 mins. >> When i capture the packets with wireshark, I got many retransmission >> packets sometime 4-5 retransmission. >> Can anyone suggest, how can I debug the issue or is there any known issue >> related to this? >> Thank you very much in advance. >> >> -- >> Bandu >> [email protected] <mailto:[email protected]> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> lwip-users mailing list >> [email protected] >> http://lists.nongnu.org/mailman/listinfo/lwip-users >> > > > > _______________________________________________ > lwip-users mailing list > [email protected] > http://lists.nongnu.org/mailman/listinfo/lwip-users > -- Bandu [email protected]
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