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New Member

NAT

Hi,

can anybody help,

we have a cisco 3640/ios12.0 with one nat inside interface and several nat outside interfaces.

On the nat inside interface there is a host with ip 10.1.1.1, this host must be reached from nat outside interface 1 with ip address 192.168.1.1, this works, config. is "ip nat inside source static 10.1.1.1 192.168.1.1"

But now, the same host has to be reached from nat outside interface 2 with ip address 172.16.1.1, if i configure " ip nat inside source static 10.1.1.1 172.16.1.1" i get error-msg

"% 10.1.1.1 already mapped (10.1.1.1 -> 192.168.1.1)"

Is it possible to reach an internal host from 2 outside interfaces with differend nat-addresses and how have i to configure this?

thanks in advance

Thomas Kuhn

3 REPLIES
Bronze

Re: NAT

The following URL should show you how to use static NAT with route-maps to accomplish your goal. http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t4/ftnatrt.htm

New Member

Re: NAT

Hello kmarrero,

could you give any information wich software i need to configure the statements in the example??

I tried 12.2(10) / c3640-ik8s-mz.122-10.bin, and after

"ip nat inside source static 10.1.1.1 192.168.1.1 " only extendable or is valid, i tried also 12.2(5) / c3640-i-mz.122-5.bin with the same result.

regards

Thomas Kuhn

Bronze

Re: NAT

You will need 12.2.4(T) or higher T train for that command to work. Sorry about that.

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