[ntp:questions] Very rapid polling

Uwe Klein uwe_klein_habertwedt at t-online.de
Sat Feb 21 10:35:15 UTC 2009


David Woolley wrote:
> Uwe Klein wrote:
> 
>> The hardware does automatic resend on collision using an
>> exponential+random backoff algorithm.
>>
> Properly functioning ethernet has minimum packet lengths that guarantee 
> that it one receiver sees a collision, all of them see the collision. 
> Therefore collisions should never result in duplicate packets at the 
> application layer.
Good Morning David,

That's the theory ;-) But even with plain 10Base2/5/T some faults
( transceiver, cable ) could make that point moot.

Today issues with firmware bugs can have significant impact.

If you follow forex Linux Driver developement ( here: for it being public )
it is quite interesting to see what "nonintuitive" issues select vendor
hardware produces.

Imho it is good practice to not exclude basic media access from your
list of possible errors.

uwe




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