Network Address Translation Router

[bruni.a]

Hello I am Looking for some product of Cisco that do the same that the 1783-NATR Allenbradley

I need change the IP Adrees of one PC from 192.168.1.100 to 192.168.1.219 but the client don't allow me to change the IP adress of the PC so i need to use one router and map the IP like the  1783-NATR Allenbradley there is some equipment that do it in cisco?

In advance many thaks!!

[Philip D'Ath · Accepted solution]

Why does the PC need a specific IP address?  If something needs to talk to it why not just program the PC's IP address into that device?

Failing that, why not add the 192.168.1.219 as a extra secondary IP address on the PC?

[bruni.a]

Hi, Realy beacuse the client don't want to change the IP adress of the PLC so i need to do it with a router do you know how to do it with a router??

[Philip D'Ath]

You can change the IP address easily when going between subnets - but you have everything in one subnet.  It wouldn't be impossible, but there would be caveats and a lot more complication.

I don't see any point in using NAT between two devices in the same subnet.

[bruni.a]

Why Philip is no possible to use NAT between two devices in the same Subnet?

There is antother equipment that do what i need? 

Remember that I need converse the IP from 192.168.1.100 to 192.168.1.219 but is not posible to change the IP adress of the PLC for a politic of the client.

[Philip D'Ath]

You could do it using two back to back routers.  Use route router to NAT 192.168.1.100 to a different subnet, like 192.168.2.219, and then a second router to NAT back from 192.168.2.219 to 192.168.1.219.

You would have to make sure the two devices were not on the same layer 2 network.

Overall, I would not proceed with such a config - not if you want a simple reliable network.  I would do it properly, and just change the IP address.  That's because I value simplicity and reliability.

[bruni.a]

Great, Philip many thanks, can you recomend to me any small model of router that i can buy to do that ?

In advance many thanks!!

[Philip D'Ath]

If the bandwidth requirement is low, a pair of Cisco 881's or Cisco 892FSP's would be fine.  You can get rack mount brackets for the 892 as well.

[bruni.a]

Many Thanks!!