![]() So if there is a damaged frame coming in it will be dropped, and the analyzer will never get it because it doesn’t make it to the cable leading to the capture device. That mode is called “ Store and Forward” and has the advantage of the switch being able to check the Ethernet checksum (also called “Frame Check Sequence” or “FCS”) and avoid sending damaged frames any further. The reason for that lies in the way most switches work these days: they wait until the full frame was received on the incoming port before sending it back out on the outgoing port. But the good news is: you don’t need special equipment in most cases anyway because the damaged frames will most likely never make it to the capture device in the first place. The bad news is: you can’t, unless you’ve got special equipment – a normal PC/MAC won’t do. Also, who’s going to buy a Sniffer Pro laptop software when there’s Wireshark for free?Īnyway, back to the topic of capturing packets with CRC errors. ![]() Well, today, the story is a little different: Xircom doesn’t exist anymore (they’ve got bought by Intel), and Adaptec doesn’t do network cards any longer (as far as I can tell). 01 – Adaptec 29022 card with Sniffer Driver
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