Per Jessen wrote:
Hans Witvliet wrote:
On Sun, 2012-04-01 at 23:29 +0200, Per Jessen wrote:
Does anyone have any real suggestion as to why a 100Mbit ethernet card cannot handle 50Mbit? It doesn't matter much, but it doesn't seem to make much sense?
Per, Don't know if possible, but can you exclude any other influences?
Not really - the new link is hooked up to the firewall which has existing traffic.
Normally (indeed...) it is not difficult to compleely saturate a 100Mb card, a bit harder to it for a 1Gb card, and it takes some effort to saturate a 10Gb card.
Besides the droppings (shouldn't happen), how did you measure the throughput?
Completely unscientifically - I ran wget on a large file, but with --limit-rate. Every minute I checked the overruns:
100000 bytes/sec – no overruns 500000 bytes/sec – very few. Minutes without any. 1000000 bytes/sec – 10/minute, 19/minute, 11/minute. 2000000 bytes/sec – 130/minute, 130/minute, 130/minute no limit – 3-400 per minute.
As to the 'why question", i've witnesed mobo's, mem and nic's gone bad long after an ESD-event. And i'm not talking about lightning, but simply unsafe removing/installing components in a pc.
Dutch telco KPN did some research on their own people and corelated it with failure events. After they implemented their strict "clean" policy the number of unexplained hw-failures dropped significantly. In their instruction-movie, they shown pictures from microscopic reseach on chips and pcb's. Something i'll never forget.
Yes, the card could be flakey, I'll try with another one tonight.
Okay, have just now replaced the 3c905B with a 3c905C - I'm still getting overruns: Single highspeed download source - 100/minute. Multiple concurrent downloads - 600-700/minute I'll try out an intel e100 card later, but I suspect the cards are all fine. -- Per Jessen, Zürich (16.4°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org