I have a virtual DC running DNS and Routing and Remote Access, that routes ALL workstations Internet traffic out to the Internet, this works fine but noticed that the Internet drops occasionally.
I've checked with our service provider (Managed Communications) and they are adamant that it's not their fault.
The Internet drops seem to affect everyone.
We also have a server configured to use the same Internet service on a different network over a site-to-site VPN connection which also suffers from packet drops.
I've spoken to Cisco and have done many tests with Cisco and they believe the problem is down to the ISP.
I'm wondering if it's a DNS issue, as the Internet service uses OpenDNS.
Any ideas?
Check for IP address conflicts. I had exactly the same problem for hours before I figured it out.
Which NIC connects you to the internet? Make sure it's quality and try swapping it with another one. Poorly programmed drivers can cause this type of scenario.
It appears it was the ISP, managed comms after all. Turned out to be a faulty bonding device. It took 3 months to admit it was their fault.