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I'm unable to get an ethernet connection with a raspberry Pi 2 over a cat7 cable of 40m. It works with my laptop, works over a short cable with same Pi. I used a same alimentation cable of 2.0A 5V

Cat7 cable

The reason I choosed cat7 cable was the price which was just 10% more and the perfs of this cable are better

Working

  • cable tested with a multimeter, every pins are working
  • Laptop connected to that same cable is working
  • Pi connected to LAN with short "normal" ethernet cable
  • I could get it work without problem twice and then disappeared!

Not working

  • two different raspberry pi hardware connected on this cable

Ping traces

20180220_1200

--- 192.168.0.17 ping statistics ---
6474 packets transmitted, 2843 received, 56% packet loss, time 6538201ms
rtt min/avg/max/mdev = 0.823/1.035/1.151/0.041 ms
Philippe Gachoud
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1 Answers1

2

  1. Seems that an electronic contact spray into the raspberry pi ethernet connector solved my problem!

    --- molezonP2 ping statistics (1000 as packetsize) --- 415 packets transmitted, 415 received, 0% packet loss, time 419263ms

  2. Unfortunately for a time and after a physical disconect/reconnect it didn't work anymore again... got again 56% of packets loss

  3. After 3 days without touching it but connected got again a 0% packets loss

Philippe Gachoud
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