Re: Poor network performance: a lot of timeouts

[Sebastian Ahndorf]

Kris Kennaway wrote:
Both sides must have same config, autosense should work if there is no 
config possibility in other end.



autosense may in fact not work, especially on low-quality NICs like rl.



I don't agree to that.
I had similar problems with my network using a cheap switch with some 
realtek nics. I had the nics running 100baseTX Full Duplex.

Changing this to autosense made the problems gone.

Reason (as some people of the german questions-list told me):
Many cheap switches always send their autosensepakets, and have great 
problems if the nics connected to the switch do not response to the 
autosensepakets (cause they are configured to 10/100baseTX full/half 
duplex).
Also realtek nics are far away from being good nics, they work without 
problems with the autosensemode and a cheap switch for me (and many 
other people I know).


I would suggest the starter of this thread to use autosense with his nic 
(if not tested yet).



Kris


Best regards
Sebastian
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Re: Poor network performance: a lot of timeouts

[Sebastian Ahndorf]

Steven Hartland wrote:


Quite a few 100tx nic / switch combinations misbehave when both
sides are not set to the same be that 100fdx or auto sense. I've actually
never seen a problem with 100tx autoneg as long as both ends had
it selected and there wasn't a cable problem.



I was talking about cheap switches (and that's pretty the same with 
adsl-routers). There is usually no way to configure (at the switch) 
which speed/duplex should be used and if you set your nic to a specific 
mode, the switch doesn't mention this. So it keeps on sending it's 
autosensepakets and waits for response. It get's timeouts and thats what 
 pulls down the networkperformance.
So you have to set your nic to autosense and you'll get a better 
performance, cause the nic responces to autosense.



   Steve


Good night,
Sebastian

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