I have a new 1811 and have configured for internet access using SDM. I can't access the internet from any of my internal ports. From my WAn port I can ping my gateway but not the internet. From my internal ports, I can ping the WAn on the router, but not the next hop gateway (my ISP router).
I just need it to work as a router, no firewall options, as it sits behind the ISP router.
I have 4 VLANS as well as the native.
It may seem obvious, I am not great on Cisco, I followed the tech notes and SDM to the letter, the damn thing just wont work (I have spent all day on it).
There may be some obvious things I didn't do, there you go, Cisco is so user friendly, I must have missed it...:>)
If anyone has any "oh, you just need to add this line and it will wor" moments, then pleae let me know...
If anyone is prepared to have a look at my config, please let me know, I will upload it tomorrow (CET).