Hi Sameer,
As Ganesh has correctly pointed out NAT or PAT is not seen in the configuration which you have posted.
Secondly, do you have one pool of static IP from ISP or you have two Pools ?
It is most likely that for WAN, ISP may give a small subnet of /30 and for your actual use ISP may give different pool.
| Your_LAN_Subnet | ----> Router INSIDE interface -----> NAT / PAT -------> WAN Link--------> ISP - cloud
LAN - is say fa0 ( treat this as "inside" interface )
WAN - serial 0 ( it may be fast 1 ) Treat this as "outside" interface
Step 1. Define your LAN network in access-list
access-list 101 permit ip LAN_Subnet WC_Mask any
Step 2 : Define pool of static IP that you will receive from ISP , you can define a single IP in the pool which will save your static IP and you will
be configuring PAT insted of NAT ( overloading )
ip nat pool ISP start-address end-address prefix 30
example:
ip nat pool ISP 10.10.1.1 10.10.1.1 prefix 30
Lastly you define inside and outside interfaces
EXample:
int fast0
ip nat inside ( makes this interface inside)
int serial 0
ip nat outside ( makes this interface outside )
use following NAT
ip nat inside source list "Acces-list -name / number" pool "Pool_name " overload
overload keyword : is very important
You already have default route pointing to ISP side, assuming you have not configured any access-lists , I think you are good to go.
for accessing internet.
Last but not least to check if your NAT is working or not try
debugging the NAT.
#debug ip nat
# show ip nat translations. ( this will give you exactly clear picture )
HTH, rate if helpful.
Thanks
Subodh
