Question Ethernet not connecting through switch on pc when cable is fine and switch works fine with other electronics?

[Theoneandonly05]

Hello, I recently bought a switch to be able to have 2 gbs running for all electronics but after putting it in and plugging my pc ethernet cable into it, it recognizes it but says no internet, and the cable is fine because when I plug it into anything else it works fine and same for switch, so I'm at a loss here.

 

[evermorex76]

What do you mean "to have 2gbps running"? You can't just plug in two cables to get 2Gbps of connectivity if that's what you were hoping. Please either describe or draw a diagram of how each of the devices is connected (included cables) and upload it to imgur.com to link here. Also include the model number of the switch and either your PC or the motherboard.

 

[Theoneandonly05]

What do you mean "to have 2gbps running"? You can't just plug in two cables to get 2Gbps of connectivity if that's what you were hoping. Please either describe or draw a diagram of how each of the devices is connected (included cables) and upload it to imgur.com to link here. Also include the model number of the switch and either your PC or the motherboard.

I have a 2.5gb feed from router to switch, and from the switch it goes straight to my pc. All other electronics plugged into switch work except for the pc and i also have an eero connected to the switch pulling 2.3gb right now. The switch is from amazon and is a brostrend 2.5gb 8 port switch. The motherboard is a b550 tomahawk max wifi. And the other pc is a asus z790 ayw wifi. Both recognize the cable is plugged in but get no internet and all drivers and bios up to date.

 

[evermorex76]

Ah okay. I assume you've also tried it plugged into different ports on the switch to be sure it's not just a bad port, and that this computer has been plugged in and working before with a previous switch or into the router.

In the Windows Network status panel/properties, it does say "connected/no internet"?

Open command prompt and run "ipconfig /all" and see if the interface is showing an IPV4 Address like 169.254.x.x (the automatic self-assigned IP when it can't reach a DHCP server). If it shows something else, then check whether "DHCP Enabled" shows Yes. Then check the DHCP Server, Default Gateway, and DNS Servers. (Ignore the IPv6 addresses if present, for now.) You can copy and paste the results here if you need someone else to look at them. You should redact some of the information like "physical address". Only paste the section for the Realtek LAN adapter. Is your wireless adapter enabled? Try disabling that as well.

If there is an address like 192.168.x.x and DHCP is enabled, then you have a presumably valid IP, and need to confirm that you can reach your router. Enter "ping <gatewayip>" using the actual Default Gateway address and see if there are replies. If that works, then try "ping <dnsserver>" with the IPs of the DNS servers one by one.

In the Windows Network status panel, down at the bottom is a "Network reset" link. You can click that and it will force all your network settings to go back to defaults which may correct any issues. (You may not want to do that if you have knowingly set anything special up. That includes VPNs, which may just need to be reinstalled if you reset the network.)

If you were moving cables around on the PC when you added the switch it's possible the port on the PC was damaged, which can end up with the link light coming on and the system thinking it's connected, but not actually being able to pass traffic. Can you plug the PC directly into the router and get a connection?