Cat 6a cable slower then local wifi.

May 2, 2018
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Hello everyone and I'm sorry to bother the community but I can't find any solution for my problem.

I'm recently studying in a other country and got my Internet from UPC.ro

They came and connected their "Connect Box" Router via Coax cable in my Apartment and I used it for some weeks now and I love the Speed of around 500mbps. I live in a big Apartment and the router is situated close to the entry and very far away from the Office Room where the PC's are located.

Today I went to the local Store and bought 40m of Cat 6a cable and the tools and connectors and started laying the cable to the next floor to the office room.

At the office room i placed a Asus RT-AC88U Router and connected the UPC Router and Asus Router via the new Cable I was placing today. After setting up the Asus Router I connected the PCs to the AC88U and did some tests.

The downloadspeed is around 40-60mbps when i connect the cable from the AC88U to the PC's and the same speed is achived over the WIFI of the AC88U.

If i connect the PC's over wifi directly to the UPC Router i get around 450-490 Mbps.

I don't know where or what the problem is. Maybe someone has an idea or a solution.

I checked the cable several times and even redo the connectors to see where the problem could be.

I tried T-568B to T-568B and T-568A to T-568B but always the same low speed of around 30-60Mbps.Even if i connect the cable to the PC directly.

Thanks in advance. And sorry for the bad english.
 
Are you sure that only one router is DHCP enabled?

UPC router seems to be your main router and therefore the Asus Router's DHCP functions should be disabled.

Did you connect the UPC router to the Asus Router via LAN ports?

Does the following line diagram match your setup?

ISP (UPC) ---coax ---> UPC Router [LAN port] ----Ethernet cable ---->[LAN port] Asus router [LAN ports] -----Ethernet cables ---> to other wired PC's.

With the UPC router providing ~~~~~wireless~~~> wireless devices.

Also what cable did you purchase: solid or stranded? Is the cable pure copper or copper cladded aluminum. Copper cladded aluminum should not be used.

Likewise ensure that you are using the correct plugs on the cable ends. Solid wire cable and stranded wire cable use different RJ-45 plugs. No need for any mixed cables. All can be 568B on both ends.




 
hey thank you for the answer.

I'll check now about the DHCP settings at the second Router an will let you know.

the line diagram is correct and the cable i purchased is the following:

https://www.schrack.ro/comenzi/cabluri-si-conductoare/cabluri-pentru-transmisii-de-date-cupru-si-fibra-optica/cabluri-pentru-transmisii-de-date-cupru-si-fibra-optica/cablu-f-ftp-cat-6a-4x2xawg23-1-500mhz-ls0h-albastru-hsekp423ha.html

I think i don't used the correct plugs i bought a pack of 12 RJ45 cat 5 shielded connectors. These have been the only one i found in the store.
 
Shielded cable.....

Probably not necessary and may be the source of your problems.

Check the following links:

http://www.tomshardware.com/answers/id-3507121/buy-shielded-unshielded-ethernet-cables.html

https://itm-components.co.uk/blogs/news/cat-6-shielded-versus-unshielded.

Do some additional research - you may note some other side effects that are relevant to your problems.

And there is a good chance that someone else will post additional suggestions and guidance.

Not sure if your current wiring set up can be saved - you may need to start over.....

 
I have had terrible experience installing RJ45 plugs (like these https://www.amazon.com/UGREEN-Connector-Modular-Ethernet-Network/dp/B01K748D2A/ref=pd_lpo_vtph_147_tr_t_2?_encoding=UTF8&psc=1&refRID=NFER5MPFS2RF6915MD8D). I had about a 50% failure rate in getting a good connection, so I switch to RJ45 connectors (like these https://www.amazon.com/CableCreation-20-PACK-Keystone-module-Connector/dp/B01FHBZF7E/ref=sr_1_17?s=electronics&ie=UTF8&qid=1525309802&sr=1-17&keywords=rj45+connector) to create a long cable and then use store bought 1 or 3 m Ethernet cables at both ends. I have used this method a number of times when I needed a temporary or very long cable with a very low failure rate (admittedly, I have had a lot of practice using the connectors while running wires in walls).