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New Member

Can I use same subnet across the wan ???

I have one scenerio like I have two sites, one site is using IP address from 192.168.1.1 to 100 with mask 24 and another site is using same subnet IP address from 192.168.101 to 200 with mask 24. And objective is to start to communication without NATing.

4 REPLIES
Bronze

Re: Can I use same subnet across the wan ???

I think it is better to subnet 192.168.1.0/24 into two subnets and use in each site.

ie,192.168.1.0/25 in one and 192.168.1.128/25 in another...and put a static route to one another from each router..

New Member

Re: Can I use same subnet across the wan ???

yes but not with routing but with bridging the ports.....

Hall of Fame Super Blue

Re: Can I use same subnet across the wan ???

Hi

There are a number of alternatives.

1) Break into 2 subnets as Arun suggested.

2) Use NAT, but i understand you do not want to do this.

3) Use L2TPv3 which will allow you to extend your layer 2 vlan across an IP routed network - see attached link for details.

http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_feature_guide09186a00801a756b.html#wp1042665

4) If your WAN was MPLS you could run VPLS and extend your vlan that way but it doesn't look from your diagram as though this is an MPLS network.

HTH

Jon

New Member

Re: Can I use same subnet across the wan ???

Jon,

Option 3 is good solution for my scenerio.

Thanks a lot

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