PAT config

bartolc12 · ‎08-10-2007

Hi guys,

I am trying to start PAT translation

I have a 2600 router with one serial interface (outside) and one fa inte (inside).

There is a switch attached to the fa interface with two hosts.

On the router i have coded whats below:

ip nat pool pula_moja 192.168.21.1 192.168.21.2 netmask 255.255.255.0

ip nat inside source list 8 pool pula_moja overload

!

access-list 8 permit 172.21.171.0 0.0.0.255

please help!!!!!

i dont get it i guess!!!

Jon Marshall · ‎08-10-2007

Hi

If you want to use PAT then you don't need a nat pool

ip nat inside source list 8 interface s0/0 overload

access-list 8 permit 172.21.171.0 0.0.0.255

int fa0/0

ip nat inside

int s0/0

ip nat outside

HTH

Jon

bartolc12 · ‎08-10-2007

how do i specify the addresses?

let's say that my host are 172.21.177.10 -11

my vlan is 172.21.171.2 and my router fas ethernet interface is 172.21.171.3.

Should i just change the addresses of my hosts, change the access list and nat will translate my host addresses into the fast ethernet address and vice versa?

Jon Marshall · ‎08-10-2007

Hi

Sorry i realised the answer i gave before didn't quite fit what you were asking. The confusion comes from the fact that you are trying to do PAT but you are mapping 2 inside hosts to 2 natted addresses which isn't really PAT.

Do you want to do PAT or nat ie.

2 hosts on the inside and 2 addresses to NAT to could be done as follows

ip nat inside source static 172.21.171.1 192.168.21.1

ip nat inside source static 172.21.171.2 192.168.21.2

You original config should work - what are you seeing when you test it ?

Jon

Route_reflector · ‎08-12-2007

Seems ur confs are ok. Have u configured "IP nat inside" at ur Fas side and "IP nat outside" at Serial inteface ??

Rgds