only achieving 100mbps at extended ranges with networkingcat6
only achieving 100mbps at extended ranges with networkingcat6
I understand this issue has been discussed before, but I believe my situation is slightly unique. I've drawn a simple chart to clarify things. My goal is to fix the kink in the cable and ensure proper setup. The cable I have is Cat6, 80 meters long, which previously functioned well. Now, after two years, it only delivers 95 Mbps (verified with iperf3) and is incorrectly labeled as a 1000 Mbps connection instead of the expected 1000 Mbps. Image 1 shows the current arrangement.
Components involved: The LSAs wall connector I use: [link](https://www.allekabels.be/netwerk-wandco...nbouw.html). All other ends connect via a standard RJ45 adapter: [link](https://www.allekabels.be/stekker-doos-e...ector.html).
Cable type: S/FTP - CU 250mhz.
My troubleshooting steps:
- Replaced the connector and router side (no changes).
- Swapped the LSAs wall plug, but PC side stayed the same.
- Tested the cable with a tester; it still only reaches 100 Mbps.
- Inspected the entire cable for kinks—found two and removed that section. Connected two cables together using an RJ45 adapter and an Ethernet extender (see image).
- Re-tested: still 100 Mbps.
- Ran iperf from router to extender (950 Mbps, recognized as 1000 Mbps link).
- Ran iperf from extender to PC (95 Mbps, seen as 100 Mbps link).
- Replaced the RJ45 connector from extender to PC—no changes.
- Rechecked all connections with a tester; nothing changed.
What I’m certain about:
- RJ45 plugs are compatible with solid-core cables.
- LSAs plug supports Cat6.
- I follow T568B everywhere.
- The cable is used within ~15 meters without issues.
- Beyond ~65 meters, it behaves as a 100 Mbps link.
- My main concern is weak signal strength over longer distances.
Possible next steps:
- Consider adding a switch in the middle of the 65-meter segment.
- Avoid outdoor exposure for the switch or cable.
- If this doesn’t resolve, upgrading to Cat6A might help, though reliability drops after ~50 meters.
Please let me know if you notice any spelling or grammar errors—I’m still improving my English.
Cat6 is very sensitive and can become brittle. It struggles to maintain its full performance and is easily affected by minor adjustments. If it bends too much it won’t function properly, tight hangers cause issues, and a single incident can ruin it. There might have been changes over the past two years—perhaps a house move, bending in the structure, a cable hitting something, stretching or kinking the cable even after removal.
I don’t have that exact detail. It sounds like you might be referring to cat6a, which is a standard for Ethernet cables. The core idea is that the internal wires are carefully twisted together in precise patterns, and any disruption can cause problems. The shape and movement of these twists are essential for performance.