Lan to Lan Communication using same subnet between 2 locations

[pawanharlecisco]

Hi Team,

             I have certain queries. As mentioned in topology I have two locations (Location A & Location B). I have data MPLS lease-line to connect this two location. Thing is that i want to configure Same subnet IP address on LAN of both locations.As my machine dont have a facility to configure default-gateway ,so i need to specify same subnet IP on both sides.Please suggest me and help me to do so.

I want to communicate Location-B  IP 172.16.15.1 to Location-A IP 172.16.15.5.

Dual Nat is not possible as MY machine dont have a facilty to assign default-gateway.

Please find the attached topology

[shamax_1983]

Hello Pawan

I think pseudowire is your friend. It will extend your LAN to the other side.

Find more information here : http://blog.ine.com/tag/pseudowire/

Please rate this post if helpful

Thanks

Shamal

[paolo bevilacqua]

You should never do that.

Two locations, two subnets. And everything will work easy and surely.

[chuckwilson]

Depends upon the equipment you have available...

If you just have a couple of routers then you can configure them (and wan link) as a bridge.

if you have switches on each side then you could set the wan link as a trunk.

Neither of these is a recommended configuration for wans but both will work, especially for a small network.

[canero]

Hi Pawan,
You may consider OTV as well if you have ASR or Nexus switches as well

Sent from Cisco Technical Support iPhone App

[jawad-mukhtar]

HI,

You can have L2 VPN lease-line link to connect these two location form your ISP.  and Terminate that Link Dircelty into Your switches, in this u can have same subnets between two locations.

*** Do Rate Helpful Posts***

[Aries Fernandes]

Hi Pawan,

I too believe, OTV is your friend and works as a wonderful solution. If there is reachability between the routers at locations A and B [external interfaces], that is more than enough you need not worrry about anything. We can make this work, all you need are asr1k or nexus [don't know the flavor] routers. Even CSR1000V [virtual-router] can be used for this purpose.