I'm sure the answer to this question must be simple but try as I might, I can't get it to work! My situation is as follows:
I have an NTL Broadband Cable Modem which is ordinarily connected to a Belkin Wireless G Router (although I don't use the wireless capability
- just cables). Everything works fine. I want to swap this Belkin Wireless G Router for a Cisco 831 router running IOS 12.2 for reasons relating to my job.
With the full (and I think somewhat complicted!) config that was already on the router, I had no Internet connectivity at all. In order to troubleshoot, I stripped down the config to what I thought was the very most basic config required with the intention of putting it back line by line afterwards. Specifically, my basic config is as follows:
'ip address dhcp' on the external interface.
'ip address 10.3.6.1 255.255.255.0' on the internal interface.
'ip dhcp pool DHCPPool network 10.3.6.0 255.255.255.0 default-router 10.3.6.1 dns-server 10.2.1.2'
'ip route 0.0.0.0 0.0.0.0 ethernet1'
The router picks up an '81.102.x.x' IP address on the external interface just as it should however, still no connectivity whatsoever to the outside world.
Please help! I must be missing something but I don't know what it is! Many thanks in advance!