RV042 Load Balancing - DR Solution

Discussion in 'Cisco Small Business Routers and VPN Solutions' started by pdorey@aspidistra.com, Sep 29, 2007.

  1. HI,

    I have used a pair of RV042s very successfully for a year or more to VPN tunnel between our office and the Data centre in London.

    I have now used another to set up a Disaster Recovery and ISP failure solution between our office and DR set up (my house). It looks like this

    Office ADSL connection with a publically addressable ip range (R1) this goes to WAN1 on an RV042 to the Office NAT.

    The public range goes via a wireless bridge to my house where it goes to WAN2 on another RV042 on the the House NAT. A VPN connects the two private address ranges. This all works.

    The house has another ADSL connection with another publicaly adressable range (R2) this is connected to WAN1 on the house RV042 and WAN2 on the Office RV042 via the wireless bridge.

    If I leave the dual WAN set as failover with WAN 1 primary in the office and WAN 2 primary at home it all works but I don't get to use any of the house ADSL bandwidth I am paying for. If I switch to load balancing on both I get an incredibly slow and failing internet connection at both ends.

    I have read the manual and all the posts on Laod balancing but cannot seem to find any reason for this problem. has anyone got any ideas?
  2. Sfor

    Sfor Network Guru Member

    I've noticed the RV042 is sending DNS queries through bot WAN ports. I mean if both WAN ports have different DNS servers set, the queries are sent through both ports, anyways.

    I solved the problem by using the same public dns servers on both connections, instead of the provider specific DNS servers.
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