Question : Cisco 1811 Router no longer giving a valid IP address

I've been configuring a Cisco 1811 router and it was working. A few days ago I went to configure the VPN but I noticed that the router was no longer giving a valid IP address to anything hooked up to it. I've tried different cables, turning off the router and turning it back on, rebooting the computer attached to the router. I can't access the router via the Cisco Configuration Professional interface or even telnet to the router, yet I was able to do all of this a few days ago. I guess my question is how can I fix this (or restore factory defaults if needed) if I can't access any way to configure the router? Thanks.

Answer : Cisco 1811 Router no longer giving a valid IP address

These guys are quick.

Problem is obviously dhcp pool and vlan1 mismatch.

From the conf t prompt

int vlan1

ip address 10.11.100.1 255.255.255.0

Rest seems fine. Your dhcp exclusions should cover the range you want.