Actually, I was mainly hoping to verify that it was, indeed, a hardware problem. One person (Trevor) reporting similar results has fairly decent-quality GigE NICs on both sides – or at least what I *assumed* to be fairly decent-quality NICs!
In your case, I’d say yes, it’s time to test different NICs. Obviously one of your NICs is OK – although I wouldn’t want to put much money on which one until I tested thoroughly.
I’d also not be willing to put money on whether it’s the NIC hardware or the software (i.e. device driver) – even though you tested under two OSes, the Linux drivers and the Windows drivers share a lot of code for both Intel and Realtek NICs nowadays.
-Adam Thompson
(204) 291-7950
From: roundtable-bounces@muug.mb.ca [mailto:roundtable-bounces@muug.mb.ca] On Behalf Of Kevin McGregor Sent: Tuesday, April 06, 2010 18:37 To: Continuation of Round Table discussion Subject: Re: [RndTbl] Network performance tuning
[...] The source hardware seems to be having a problem sending. Receiving, less so:
[...]
...Although push the bandwidth (UDP) too high, and a lot of packets get lost. [...] Any further thoughts?