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New Member

question on VPN and vlan overlap on 2 remote sites.

ok, so I have 2 cisco 3845.

Site A's public 216.24.230.2

Site A's private 10.10.10.0/24

Site A's host 10.10.10.200

Site B's public 216.24.238.40

Site B's private 10.10.10.0/24

Site B's host 10.10.10.100

Both sites have the same internal IP schema.

How can I make a VPN between the 2 sites, so that host in site a has full access to host on site B.

As you can see, i'm very newbie when it comes to VPN's.

Thanks in advance.

4 REPLIES
Hall of Fame Super Blue

Re: question on VPN and vlan overlap on 2 remote sites.

Nelson

Start with this document and come back if you have further questions -

http://www.cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a00800b07ed.shtml

Jon

New Member

Re: question on VPN and vlan overlap on 2 remote sites.

but this is for same IP addresses on both sides... I don't have that issue. I simply want the VPN to pass traffic like if it was a bridge to the other site.

So that when I ping from site A to site B's host, it looks like it's local.

Is this at all possible?

New Member

Re: question on VPN and vlan overlap on 2 remote sites.

is there a way to basicaly use the VPN to extend the broadcast domain to the other site? I dont have conflicting IP address, but I also cannot do NAT because of the applications being used and sone other dependencies...

Hall of Fame Super Blue

Re: question on VPN and vlan overlap on 2 remote sites.

Nelson

Apologies for misunderstanding, you made it sound like an overlapping subnet issue.

L2TPv3 will allow you to extend a vlan across a L3 routed link but i think this is more complicated than just using the example i previously supplied -

http://www.cisco.com/en/US/docs/ios/12_3t/12_3t2/feature/guide/gtl2tpv3.html

Jon

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