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Home > Forums > MIS/IT > Management Tools > Network General: Sniffer Forum

No Collisions/Errors/Drops?????

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teatew (IS/IT--Management)

9 Aug 01 13:05

What's the likelihood that a 400user switch+hub environment has no collisions,errors,or drops?

Or is there a setting I'm missing here. I'm currently plugged into hp hubs on this segment, and I see zero errors even when utilization hits 80-90%??????

ed

wybnormal (TechnicalUser)

9 Aug 01 18:57

Pretty slim.. are you on a hub or switch.. if a switch, that might be your answer. Also, you need the NAI card ( or Xircom PCMCIA CB-2) and the NAI drivers installed. If you are using a plain ol' card, you will not see the errors as the card either dumps them or "corrects" them for you.

Just quick thoughts.. your milage may vary

MikeS

"Diplomacy; the art of saying 'nice doggie' till you can find a rock" Wynn Catlin

jrsavage (Vendor)

13 Aug 01 9:42

As MikeS said, you need the NAI NIC and drivers. A normal NDIS driver will discard packets damaged a the physical and MAC layers thus they are not forwarded up through the OSI model. Sniffer being an application does not get to see those errors. The NAI drivers allow physical and MAC layer damaged packets to be forwarded up through the OSI model for sniffer to see.

John R Savage
Sniffer SE
Dallas TX

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