Question Ethernet keeps disconnecting and reconnecting every second after installing a network switch ?

[soemoe9]

Hi guys,
I recently bought a network switch to improve my home network. After plugging the PC into the switch, it keeps disconnecting and reconnecting every second.

My setup is simple, I had:
Router -> PC (via ethernet)
Router -> Access Point (via wifi as a extender)

then to improve the speed on my access point, i bought a network switch, and now it's:
Router -> Switch
Switch -> Access Point (via ethernet) - this works. i even followed the guide on here to disable DHCP and assign IP one increment above master router. It actually works without disabling DHCP too.
Switch -> PC (via ethernet) - this keeps going ON-OFF-ON-OFF....driving me nuts

Some troubleshooting i've done:

• connect the PC straight to master router, still works like before
• flushdns, ipconfig release, renew...
• try every port on the switch
• reboot every device on the network
• assign my PC an IP from windows
• assign my PC an IP from the master router
• connect the PC to either router via wifi, still works, but i do need to use ethernet for gaming

what I cannot do:
- connect the PC to the access point, it only has one port and it's one of those extenders

So i achieved the improved speed i wanted on the access point, but in the process my PC's ethernet is wonky now. It does have internet, but disconnects every second.
Any advice will be appreciated!

 

[rgd1101]

test with another switch?

 

[Ralston18]

Reference:

" i even followed the guide on here to disable DHCP and assign IP one increment above master router. It actually works without disabling DHCP too. "

But DHCP is off - correct?

Update your post to include make and model information for Modem, Router, Access Point and Switch(s) - if a replacement switch did not/does not work.