Here is a strange one. We have a dedicated Fiber service with our ISP running 10mb/Full. Their demark router is a Cisco 1800 with a single fiber transceiver. Our side is using a RAS server to connect to the 1800. The Server is Win 2003 configured for RAS, DHCP and NAT. DNS is handled by the ISP's server via DNS forwarding. The ISP has replaced the Fiber module and the 1800. It was replaced with another 1800 and it is running the same config.
The problem is that the internet access will drop sometimes 3x a day. There are no events created on either the server or the router and the consistent fix has been to reset the interface on the router by either cycling the router, disconnecting and reconnecting the ethernet cable or by cycling the server. Once the interface is reset service is restored. When the service goes down I am still able to ping the public side of the router but no farther.
Any suggestions would be appreciated. Also we have tried just running a laptop directly to the router and had the same result with it going down.