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Network Reconfiguration between my corporate office and branch office

Posted on 2012-04-13
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Last Modified: 2012-04-20
I have a corporate office and a branch office.  The corporate office is on the 172.17.0.0/16 network and the branch office is on the 172.16.0.0/16 network.  I recently setup a line of site wireless bridge between the two offices so the branch office can get rid of their internet circuit and use the corporate office internet circuit as we just got them a 20Mbps circuit.  Now I have the wireless bridge up and running, but its just not attached to the network yet, meaning I just have a laptop at each end of the bridge and I can ping across.  The bridges are not plugged into the switches or anything yet.  My initial plan was to put the branch office on the same network as the corporate office (172.17.0.0/16), but the server guys don't want to have to change the IP addresses on some of the servers at the branch office because they believe their will be issues with a couple of the serves if they do.  I am using Cisco Aironet 1310 bridges for the wireless bridge between the two buildings.  The bridge at the corporate office is 172.17.0.50 and the bridge at the branch office is 172.17.0.51.  My plan is to configure an interface on the Cisco 2801 at the branch office with a 172.17.0.0/16 address, and plug the bridge directly into that interface, and the other interface on the router will remain 172.16.0.1 as this is the gateway for all workstations/servers, etc.  This should work right?
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Question by:denver218
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TimotiSt earned 2000 total points
ID: 37842926
That should work, yes. Don't forget to put a static route on the main router for 172.16.0.0/16, pointing to the branch router.
A more "elegant" solution may be to use a dedicated subnet between the 2 routers, but it's not really needed.
Also don't forget to NAT the 172.16.0.0/16 subnet on the main router, so they can access the internet.

Tamas
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by:denver218
ID: 37871543
Thanks.
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