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Site to Site VPN in Cisco router with Same subnet

dhinesh_83
Level 1
Level 1

Hi Team,

 

     I would like to setup a vpn connection from my site A(Cisco Router) to another site B(Cisco Router), i would like access to their internal network however their site B is using the same internal range as me 10.1.1.0 /24.Can you anyone please help me to configure in the cisco router.

4 Replies 4

dhinesh_83
Level 1
Level 1

Please anyone provide me  the example configuration.Its urgent requirement.based on the example config i can prepare with my network

You may Hide(NAT) your internal network that should be sent over VPN.

Thanks for the update...I have prepared the configuration as per your advice.Requset you to review the attached config and share your inputs.

I have one more requirement For DNS NAT translation.

 

For Example Site A wanted to access the server in Site B via hostname.Server address has been mapped to 10.10.1.5 in DNS server.In Site A DNS server sends the requset to DNS server in Site B for asking the ip address of the server.Once the DNS server in site B reply to DNS server in Site A with ip address 10.10.1.5.In that case we have same network already running in site A there should be conflict.We need to do the DNS NAT for the DNS reply from the server.

 

I have added the DNS nat configuration.Please review the config and provide your inputs weather its correct or not

Joseph W. Doherty
Hall of Fame
Hall of Fame

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That's a bit complex, as you would either need to use NAT, as also mentioned by Anukalp, or you would need to create a L2 tunnel.

For additional help, you'll need to provide more detail information beyond there's a Cisco routers at each site.  Capabilities of Cisco routers vary a bit on series, IOS versions, and feature sets (also now sometimes licenses too).