Sudden loss of network connectivity (both wifi and ethernet)

[thewad]

I rebooted my system last night (OS 10.12.6, see description below, ethernet/wifi info included because of the specific problem), and my system lost its ability to use my wifi network. I say use because my system preferences/network shows wifi connected to my router with a correct IP addy (yes, wifi router works with everything else, iPhone, iPad, MacBook Pro, ThinkPad, Chromebooks). When I try to load a web-page the progress bar stalls 1/10 of the way. If I turn off wifi the browser tells me I'm not connected to the internet. I tried using ethernet and again it connected with a legitimate set of IP/router/subnet addys and again, loading a page stalled. I tried the ethernet with my MacBook Pro and all was well.

What I find most disturbing is the I get the same non-functional behavior from both my TP-Link wifi card and my onboard ethernet.

I know this is an old OS and I should just bite the bullet and install Mojave (Catalina seems too new), but I hate it when something breaks for no apparent reason.

Thoughts?

X170X-UD5 TH
4.2 GHz Intel Core i7
64 GB 2400 MHz DDR4
Intel I219V2 PCI Express Gigabit Ethernet
Radeon RX 570 (shows as AMD R9 xxx 8192 MB)
TP-LINK TL-WDN4800 WiFi card

 

[Going Bald]

Try flushing the system cache and rebooting.

 

[thewad]

Thank you sir! I've bit the bullet and am using multibeast to do post installation set up as I type this. Look for me posting with more problems