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Dual subnets, dual feeds, RV042

Discussion in 'Cisco Small Business Routers and VPN Solutions' started by Billsey, Jun 18, 2007.

  1. Billsey

    Billsey LI Guru Member

    I've got a potentially weird idea I'd like to use a pair of RV042s to implement. I have a group of internet IPs sharing hardware with a non-public address space (the clients all have valid internet IPs, the provider equipment is in a class B subnet at 172.x.x.x) and I was to place a redundant feed in at one location that will allow servers at that location to be accessed either through the normal network (with their internet IPs) or through the redundant feed via VPN tunnel. Here's an arbitrary example (sorry about the periods, this software strips the spaces):


    internet feed ---RV042 -- xxx-subnet ----+
    ................/.........................\
    ....VPN Tunnel <...........................\
    ................\.........................RV042 --+ xxx-subnet server
    .................\_____________________+___/
    .......Alternate internet yyy-subnet --/


    I want to have the server respond to requests to it's xxx address even if the addresses comes in over the tunnel through the yyy feed. Now I believe everything would work great if only one side were setup, and fail over to the second side if that first side failed, but what happens when both sides are working?

    To compound the question, the server also has a second address assigned within the 172 subnet, do both subnets get routed through the same VPN, or do I have to setup two VPNs between the two RV042s to get both to work?

    Any help you can provide would be greatly appreciated, and I'll try and explain the idea better if this isn't understandable... :)
     

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