Messages in this thread | | | Date | Fri, 9 Dec 2005 07:36:08 +0100 | From | Willy Tarreau <> | Subject | Re: Urgent work ! please help |
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On Fri, Dec 09, 2005 at 11:22:47AM +0530, Conio sandiago wrote: > Hello Willy, > Thanks a lot for reply. > i have done some more investigation and now i have the following observation:- > > > 1) When i analyse the packets using ethereal, > i saw some duplicate Acks from the reciever, after which > transmitter does fast -re transmission, > In this transmission i saw some TCP checksum incorrect messages. > > > > 2) Now if i disbale the DCACHE in the system , And then do the ftp, > everything works well. > > > > No my doubt is > > a) When does a transmitte do Fast Retransmission,?
when there is a high packet loss rate
> b) if i disbale the cache then system performance goes very slow, > thats why everything goes well,
so probably you have a timeing problem in your driver. Maybe you has to wait milliseconds somewhere and you wait microseconds instead, or something like this.
> c) what is the case of collsion in the ethernet driver??
I don't understand your question. It's not the driver which makes ethernet collisions. Collisions happen when several ethernet transmitters send simultaneously on the same bus (hub).
> Please help > Thanks in advance > conio
Willy
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