Media for NAT Troubles

NAT Troubles

I have an issue with NAT. I'm trying to test the NAT config in the Cisco doc

formatting link

I have setup my CCNA network simulator lab as follows:

NAT Router S0 172.16.10.64/24 Fa0/0 10.10.10.1

WWW Router S0 172.16.10.65/24 Fa0/0 172.16.11.1/24

I also have two pc clients off each router via a switch. Two NAT clients are 10.10.10.3 & 10.10.10.4. The two WWW clients are

172.16.11.3 and 172.16.11.4.

I configured the NAT router as follows:

S0 ip address 172.16.10.64 255.255.255.0 ip nat outside

Fa0/0 ip address 10.10.10.1 255.255.255.0 ip nat inside

First I tried to configure as per cisco doc ip nat pool no-overload 172.16.10.1 172.16.10.63 prefix 24 ip nat inside source list 7 pool no-overload access-list 7 permit 10.10.10.0 0.0.0.31

When this didn't work, I then got rid of the dynamic stuff and just put in ip nat inside source static 10.10.10.3 172.16.10.70

On both occasions, I can't ping any of the WWW clients from my NAT client. I can't ping any further than 172.16.10.64 from the NAT client. What gives? If I implement routing between NAT and WWW it all works. Is routing still required in this situation? I would have thought the WWW router could relay traffic from hosts on the

172.16.10.0 network to the 172.16.11.0 network since the networks are directly connected to the router. All the examples I've seen state to NAT the inside local (in this case my NAT client IP) to the inside global (which is supposed to be an IP address on the other side- serial interface- of the NAT router)

Any help greatly appreciated!