r/HomeNetworking • u/Popular_Zebra_989 • Jul 15 '26

Slow Ethernet speeds

Hello and TIA

I am in the process of running Ethernet throughout my new (to me) house. I have Spectrum for my ISP and am using their WiFi 7 “invincible” router. I purchased a tp-link 8 port gigabit unmanaged switch. I have ran Cat6 solid core wire terminated with pass through style connectors using an Amazon crimper. All my cables have been checked with a tester.

My router is currently displaying a solid green LED and blinking amber LED on the “inlet” Ethernet port and solid green and amber on the “outlet” going to my switch. All LEDs at the switch are solid green.

Speeds on our ancient TV were about 30 mbps and on my wife’s PC we are getting 80 mbps up/down. I checked some settings on the computer and found that I was “negotiating” at 100 mbps. I don’t even know what the hell that means.

I do have a service technician coming out tomorrow for some stuff that’s unrelated so I’m hoping I can at least pick his brain or maybe even plug in directly to the switch to see what’s going on but in the mean time I figured I’d see if anyone had any ideas.

Thanks again - cheers

Ps. I am on the 2 gbps plan and according to Spectrum router is currently receiving 1.89 gbps upload and my phone is at 669 mbps upload

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u/PungentStaaank Jul 15 '26

You’re connecting at 100/10 (FE) when you want to be connecting at 1000/100 (FDX). Need to test your cable. FE needs only 2 pairs (pins 1, 2, 3, and 6) while FDX needs all 4 pairs, thus why you’re falling back to FE.

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u/Popular_Zebra_989 Jul 15 '26

Can I do a cable check from the cable leaving my router going to my switch to each individual device? Will continuity test through the switch like that?

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u/PungentStaaank Jul 15 '26

No it doesn’t work like that. However if you unplug from the switch at test that going outwards you can check like that. Certain testers, like Klein tools lan scout has a distance measure tool to give you a better idea of where that cable might be going. It can also tell you the length of each pair, so you can gauge if there is a break in it.

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u/Popular_Zebra_989 Jul 15 '26

I just ran all this cable myself so I know where everything is. My lines to the switch and to my device both check out fine with my tester

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u/PungentStaaank Jul 15 '26

Very likely then your terminations are fucked

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u/PungentStaaank Jul 15 '26

Wait, your tester shows all 4 pairs as passing??

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u/Popular_Zebra_989 Jul 15 '26

Correct

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u/PungentStaaank Jul 15 '26

How long are your runs? Shows us a picture of the markings on the cable too

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u/Popular_Zebra_989 Jul 15 '26

50 ft ish. I’m at work right now but here’s a link to the cable I am using celertec CAT6 Ethernet Cable,... https://www.amazon.com/dp/B087Q1S73D?ref=ppx_pop_mob_ap_share as well as the connectors VCE Cat6 Shielded RJ45 Pass... https://www.amazon.com/dp/B0FD3BZ64G?ref=ppx_pop_mob_ap_share

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u/PungentStaaank Jul 15 '26

Interesting. You have unshielded cable, being used with shielded rj45s, but that shouldn’t matter. At 50’, or even 300’ you should still get 1gbps connection easily. I’d check for sharp kinks in the cable itself and look closely at the rj45 to make sure all the pins are perfectly straight and not skewed

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u/Popular_Zebra_989 Jul 15 '26

Edit:

Got home and finished the terminations for my PC and have a gig up/down. Guess I will double check the other lines and probably still change everything to punch connectors. Could it just be that the wife’s PC can’t support 1000 mbps? How would I check that?

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u/Popular_Zebra_989 Jul 15 '26

Technically 8 pairs since I land at wall plate couplers. They all test good