We have a Cisco Catalyst 500 Ethernet Switch connected to a Cisco 871 Ethernet Access Router.
The network is basically 1 VLAN with approx. 10 Computer Hosts and 10 Commercial Printers.
The Vlan host IP addresses are static local IP numbers. (10.40.6.X).
I have tried to configure the router to dynamically NAT the hosts Static IPs with the Outside
interface IP address (FastEthernet 4) with overload. When I test the interface with SDM, between the
Ethernet 4 Global address, and the default static route IP addr.(the ISP default gateway) The SDM
sets up the ping, not to the gateway address but to the DNS and of course the ping fails.
If I manually set the ping from the FastEthernet to the default Gateway the ping is successful
The Router sometimes works well for a while and then suddenly cannot route to the internet. The configuration has not changed and I can verify the Running Configuration via both SDM and the IOS CLI. This inconsistency is
devastating. This configuration must be the most simple that one can implement. I have attached the running config. Is this a configuration error or is there a router hardware problem?