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Trying to capture fcs for Ethernet frame. what be the best bet to capture it would that be netBSD. Any clues folks who have tried it before.

asked 03 Jul '13, 02:28

Dees's gravatar image

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answered 03 Jul '13, 03:58

Kurt%20Knochner's gravatar image

Kurt Knochner ♦
accept rate: 15%

edited 03 Jul '13, 03:59

Thanks Kurt.

We are trying to debug some packet with incorrect FCS and to compare this with what application is reporting was looking to capture some wired traces with FCS.

Could somebody guide me which interface card or OS is suitable to capture FCS on the Ethernet frame?

(08 Jul '13, 14:30) Dees

Well, I know that my Network General S6000 devices can capture FCS and even duplex negotionation link pulses, but they are very special capture solutions. I guess most of the expensive commercial network recording solutions should be able to do the same.

(08 Jul '13, 19:08) Jasper ♦♦

I know of no definitive list of adapters that supply an Ethernet FCS; however, Guy Harris has apparently had some luck with at least one and has also mentioned some hardware capable of supplying the Ethernet FCS in his answer to "Can Wireshark capture an entire Ethernet frame including preamble, CRC and Interframe spacing?" over on

You might also want to research network taps. There are many vendors/manufacturers that supply such taps, so many in fact that I hesitate to mention any by name, for a few reasons.

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answered 08 Jul '13, 18:21

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cmaynard ♦♦
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question asked: 03 Jul '13, 02:28

question was seen: 15,035 times

last updated: 08 Jul '13, 19:08

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