My Computer won't connect to a different router via ethernet cable

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Schumstra

Commendable
Oct 26, 2016
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Hello, I've been trying to solve this problem myself but i couldn't find anything so I decided to ask on here.

Today we got fibre optic installed in our house which came along with a new router (FRITZ!Box 7560 QQ). I have an ethernet cable going from my room to the router. I plugged the ethernet cable into the new router and now my pc says it cannot find a connection and tells me that there is no cable connected. When i plug it back into the old router everything seems to work fine. Also when i plug the ethernet cable into the new router and connect my laptop to that same ethernet cable as used for my pc everything works fine.

I've tried resetting my network settings but that also doesnt do anything.

I have an asus z170 motherboard and use the onboard ethernet.

 
Solution
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When the machine can not see the cable it tends to be a physical problem with the cable. Unfortunately you can get ethernet cables that are defective but work on some machines but not others. It could be that the old router had 100m ports and the new one has gig. Gig ports have more issues with poor cable.

In most cases it is because the wires do not make really good contact in the ends. If your cable is copper clad aluminum (CCA) or if it is that stupid flat/thin cable these cable do not meet the standards for ethernet and have all kinds of strange issues. You want a cable that is pure copper and has wires between 22-24 awg.

I would try a new/different cat5e cable.
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bill001g

Titan
Aug 9, 2012
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When the machine can not see the cable it tends to be a physical problem with the cable. Unfortunately you can get ethernet cables that are defective but work on some machines but not others. It could be that the old router had 100m ports and the new one has gig. Gig ports have more issues with poor cable.

In most cases it is because the wires do not make really good contact in the ends. If your cable is copper clad aluminum (CCA) or if it is that stupid flat/thin cable these cable do not meet the standards for ethernet and have all kinds of strange issues. You want a cable that is pure copper and has wires between 22-24 awg.

I would try a new/different cat5e cable.
 
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Solution
S

Schumstra

Commendable
Oct 26, 2016
4
0
1,510


My cable is a Cat6 cable so should it not be able to handle it?

Edit: Thank you, I've tried using a different cable and it worked


 
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bill001g

Titan
Aug 9, 2012
28,313
2,751
125,640
It is not so much if it is Cat6 it is if that particular cable is having a problem. It could be a cable from the best manufacture in existence and the cable got some how damaged. It tends to be that a cable end got pulled just slightly loose. It tends to not be worth your time to try to replace ends.

My comment on cable types is because people are buy the cheapest crap cables they can find on amazon that are being sold out of china. The term cat6 means nothing I could call a coat hanger cat6 wire if I wanted to. Some vendors though have gone a step farther saying the cable is eia/tia certified cable. This is outright fraud in some cases, the wire MUST be cooper to be certified and so no CCA cable can be certified but they "claim" theirs is.

Pretty much just try a new cable from a reputable vendor. Local stores tend to not sell the crap fake cables.
 
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