Why does my new router hate my PC?
May 7, 2014 1:24 PM Subscribe
We recently brought in a new broadband provider to the house. Everything is working swell, except the desktop PC refuses to establish a steady connection to the new router. What am I missing?
posted by SquidLips to Technology (6 answers total)
The desktop has always been connected via ethernet cable to the router which has been in the same room. Now, with the new router downstairs, I'd like to connect it to the ethernet port in the wall that runs down to the office where all the cables are aggregated.
Problem is, the PC refuses to retain a solid connection. It will connect, and I can surf fine for a few seconds, but then the interface reports 'cable disconnected' and the connection drops. The lights on the router end and the port on the PC both go completely dark, indicating a complete lack of connectivity (right?). A few seconds later it connects again. Rinse and repeat.
The PC connects just fine to the old router. My laptop connects just fine to the new router using the same wired wall jacks; I've tried multiple jacks around the house and they're all the same - the laptop connects rock solid, but the PC continues to flake out. I've got our DVR and DVD player connected via the wall jacks and they're also both fine. I've tried different cables, made sure I'm not using a crossover cable, etc. I've verified the adapter settings are identical between laptop and PC. Gone through every setting I can find on the admin interface of the new router. That specific PC just refuses to get cozy with that specific router.
Original router, which the PC works just fine with, is a netgear WGR614. New router is a Cisco DPC3828D.
PC ethernet card is 'Realtek PCIe GBE Family Controller' integrated on the motherboard. It's a couple years old. Laptop interfaces is also Realtek, 'PCIe FE family', on an HP laptop, also a couple years old.
Key differences are:
PC is plugged into a wall jack now, with a cable run of less than 50 feet to the new router. Previous config was a cable directly to the old router. But multiple other devices work fine so I don't see it as a cable problem.
Cisco functions both as a cable modem and router. Old router is just a plain router, with an uplink cable from the DSL modem.
New router is DOCSIS 3.0; old router isn't. But isn't this just a protocol between my ISP and the router? Has nothing to do with my home network, right?
Old internet is still functional, and I can switch the cable from the wall jack to the old router and the PC will happily connect solidly.
I turn to you, experts of the internet. What else should I be looking at? Next step would be to go grab a separate network card and pop it in to see if there's something strange with the onboard interface, but since it works fine with the old router I'm not convinced it's broken.
Thanks in advance!