nattig questions

[NewToo]

Ok I have a Cisco 3660 router with two t-1 from the same ISP I'm blinding them together to have 3mg of bandwidth.
How do I go about configuring this router for Nat. One more thing I'm getting one more T-1 from a different ISP. So there will be three t-1. I want to us the My 3660 router please help.



interface Serial0/0
ip address xxx.xxx.xxx.xxx
no ip route-cache
no ip mroute-cache
load-interval 30
no fair-queue
!
interface Serial0/1
ip address xxx.xxx.xxx.xxx
ip load-sharing per-packet
no ip route-cache
no ip mroute-cache
load-interval 30
!
ip route 0.0.0.0 0.0.0.0 Serial0/0
ip route 0.0.0.0 0.0.0.0 Serial0/1

 

[stoney66]

do you have a pool of address you can nat that the isp will advertise for you? or do you want to nat all traffic from your lan to your serial interfaces ip address?

either way, you need to add "ip nat outside" to your external interfaces, and "ip nat inside" to any internal interfaces that you want traffic to get natted when it exits the serial interfaces. The next step would be to define a nat pool, either using the interface and doing overload (pat) or making a nat pool with or without overload, then apply your access list to what traffic you want to allow to be natted.

ex:

int s0
ip nat outside

int f0
ip nat inside

ip nat pool NATME 12.1.1.1 12.1.1.2 netmask 255.255.255.252
ip nat inside source list 1 pool NATME overload
access-list 1 permit xxx

stoney