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Beginner

Network Address Translation

Greetings,

 

I would like to NAT outgoing traffic only from a subnet ID 192.168.88.0/24 to a subnet ID 172.20.30.0/24 BUT only for traffic heading towards two partner subnets (10.20.40.0/24 and 172.20.95.0/24) without affecting outgoing traffic to other partners. How can I configure this? The device is an ISR 3800 series. 

 

Thank you in advance. 

1 ACCEPTED SOLUTION

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VIP Mentor

Re: Network Address Translation

Hello,

 

your best option is probably to use policy routing and route maps. Post the full running configuration of your router, so we can fill in the bits and pieces...

View solution in original post

6 REPLIES 6
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VIP Mentor

Re: Network Address Translation

Hello

Are you using single or multiple egress interfaces for nat?



kind regards
Paul

Please rate and mark posts accordingly if you have found any of the information provided useful.
It will hopefully assist others with similar issues in the future
Highlighted
Beginner

Re: Network Address Translation

Multiple interfaces. Traffic to each partner network goes out through a
different sub interface
Highlighted
VIP Mentor

Re: Network Address Translation

Hello,

 

your best option is probably to use policy routing and route maps. Post the full running configuration of your router, so we can fill in the bits and pieces...

View solution in original post

Highlighted
Beginner

Re: Network Address Translation

Greetings Georg,

 

Thanks went with your proposal it worked. 

 

Regards 

Highlighted

Re: Network Address Translation

Hello,

On the ISR 3800 series Router create:

  1. An extended access-list with source (192.168.88.0/24) and destination (10.20.40.0/24 and 172.20.95.0/24)
  2. Create a nat pool for subnet 172.20.30.0/24
  3. Apply command ip nat inside on the interface from where the traffic is originating
  4. Apply command ip nat outside on the exit interface
  5. Apply final command ip nat inside source list <access-list created at Step1> pool <nat pool created at Step2> overload

Thanks to advise if all OK.

 

Regards,

Highlighted
Beginner

Re: Network Address Translation

Hi Koushaldev,

Thanks for the response, I found a way out with Georg's suggestion.

Regards