Frequent Wired Internet Disconnects (Not wifi)
Greetings,
Hard wired (Ethernet) Internet connection goes offline about every 10 minutes.
Using:
Mac Pro (the Late 2013)
System Sierra 10.12.6
Firefox 62.0b18 (64-bit)
Static IP and specific DNS settings, mostly
Ethernet (not wireless)
Pace Uverse 5031NV-030 with wifi always OFF.
Downstream ASUS router for Apple TV and other IOT things.
Frequent Internet disconnects:
--Mac Pro only, other stuff on network is normal, nearby windoze PC is normal.
--Internet connection drops random about 6-10 times per hour
--Apple Network Diagnostics Control Panel (found on System Sierra and below)
- - Ethernet Green
- - Network Settings Green
- - ISP, Internet, and Server becomes either yellow or red, and the Mac won't ping out.
-- Connection will not return until I do something.
The Late 2013 Mac Pro:
Static IP is primary, although trying DHCP will not necessarly solve the problem.
Lan cables are tested and ok.
Nearby (Ethernet) windoze box is always up. (Same Pace Uverse 5031NV-030)
What it takes to regain IP:
--Reboot or Physically disconnect ethernet from Mac, wait 10 minutes, reconnect, status returns to normal.
or
-- Network settings, manual.
Switch off (unplug) Ethernet
Change 4th octet AND DNS to something else
Apply
then switch ON/plug in Ethernet
I have to do this about 3-4 times trying various DNS's and static IPs. IP never comes back on the first try.
Network Radar tells me that my static IP choices are unique and not in collision with something else.
Sometimes I change it to DHCP but results are usually fail, or it works for a short time.
Sometimes I try wireless to a downstream Asus switch, results are mixed.
Changing the Cat port on the Mac made no difference.
DNS Changing:
I've tried over 15 DNS's, including the AT&T DNSs and none are any better than each other, It's the changing of the DNS several times, that usually brings the Mac to all green for a while.
The always-up windoze box uses 68.94.156.1 or 208.67.220.220. Making these DNSs primary on the Mac often fails to solve the frequent internet failures. I have a long list of well-known DNS's that I've tried, none better than the other.
Other Efforts:
Creating and changing network "locations" with different manual IP settings and DNS settings for each, made no difference.
Rebooting the Pace Uverse 5031NV-030 will bring status back for a while, but its no better than changing the Network DNS settings. Pace/Uverse diagnostics are all good.
Running all the Onyx cleaning functions, especially the Onyx internet tab, made no difference. SMC and Pram reset bootups made no difference. Running Yasu daily, is good practice, but it made no difference.
In the end, I get about 10 minutes of internet followed by 5 minutes of DNS and 4th octet changes needed to restore IP. 10-20 minutes later, I have to repeat the process to get back online.
Various Internet searches reveal problems and solutions for wifi - this problem is with wired-ethernet.
Any advice will be most appreciated.
Mac Pro, macOS Sierra (10.12.6)
