How to reliably generate Ethernet frame errors in software?

Question

Question:

I\'m testing a section of cable-fault finding software, and I\'d like to reliably and reproducibly generate cable faults on a cat5 cable.

At the

Answer 1

If you're working in C, you can send a raw Ethernet frame using socket(AF_PACKET, SOCK_RAW, ...), and passing it a pointer to a raw buffer that you've generated yourself (e.g. by following the frame layout at wikipedia ).

It's been a long time since I've done this, so I'm not going to attempt to write a representative code snippet...