Alright, I have taken classes in CISCO like 3 years ago, even have a degree in it, but I don't remember enough to get going, so I am looking for a little help.
I just purchased a new 861. I know how to use the console port, I know my way around but still are weak in some areas. Here is what I want to do to start, until I get the router in full working order to use has my main router, I want to get it working locally. Basically I have the WAN port plugged into a linksys router. For now, the WAN port will get its IP address via the linksys router through DHCP. So how do I configure the WAN port to use DHCP?
Next question. I want to run DHCP on the cisco router to assign IP addresses internally. Then have it so all the computer plugged into my cisco can get online. Does this make since. I am just trying to take it a step at a time. I am a very quick learner if I can see an example configuration or something. Just the minimum that I need to get this to work.
Thanks for any help.
You need to make the following changes -
1) remove the default-gateway entry on the router. This would only be used if the router was acting as an end host. So
Router(config)# no ip default-gateway 10.1.1.1
then add a default-route pointing to the linksys IP address ie.
Router(config)# ip route 0.0.0.0 0.0.0.0 192.168.84.x (where x = the address of the linksys.
3) Your next problem is the linksys device needs to know about your 10.1.1.0/24 network.
Easiest thing may be to NAT all your 10.1.1.x clients to the IP address of your fa4 interface. So add the following config to your router
access-list 101 permit 10.1.1.0 0.0.0.255 any
ip nat inside source list 101 interface fa4 overload
under the vlan1 interface
int vlan 1
ip nat inside
under the fa4 interface
ip nat outside