VPN - can I use a separate T1?

Discussion in 'Windows Networking' started by Matt Dwyer, Jun 7, 2006.

  1. Matt Dwyer

    Matt Dwyer Guest

    I have a vpn that links a branch office to the main office. VPN
    tunnel is accomplished with Cisco routers linking Windows 2003 servers.

    About half the traffic at the main office is VPN traffic (using
    Solarsoft Network Engineer tools). I would like to add WAN
    accelerators, but they have limited bandwidth (1MB), so they accelerate
    the VPN, but they throttle other traffic at times since they have
    limited bandwidth. So, I don't want to run ALL traffic through the WAN
    accelerators, just VPN traffic.

    So, is it possible to install a separate router at the main office
    connecting to a separate T1 for other (voip, web, etc) traffic?
     
    Matt Dwyer, Jun 7, 2006
    #1
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  2. it depends on Cisco VPN settings. This case study may help,

    Routing One router goes to the corporation email server and another one goes to the Internet. Symptoms: you have one router connecting to the corporation for email ...
    www.chicagotech.net/routing.htm


    Bob Lin, MS-MVP, MCSE & CNE
    Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
    How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
    I have a vpn that links a branch office to the main office. VPN
    tunnel is accomplished with Cisco routers linking Windows 2003 servers.

    About half the traffic at the main office is VPN traffic (using
    Solarsoft Network Engineer tools). I would like to add WAN
    accelerators, but they have limited bandwidth (1MB), so they accelerate
    the VPN, but they throttle other traffic at times since they have
    limited bandwidth. So, I don't want to run ALL traffic through the WAN
    accelerators, just VPN traffic.

    So, is it possible to install a separate router at the main office
    connecting to a separate T1 for other (voip, web, etc) traffic?
     
    Robert L [MS-MVP], Jun 8, 2006
    #2
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  3. Matt Dwyer

    Bill Grant Guest

    Yes, but you will need to modify the routing on the network. You will
    need to set the new router as the default gateway for all your LAN machines.
    Then you will need to add routing info to this router to bounce the branch
    traffic to the VPN router.

    eg Local subnet 192.168.0.0/24 branch subnet 192.168.4.0/24

    One gateway
    Internet gateway
    192.168.0.1
    |
    LAN machines
    192.168.0.x dg 192.168.0.1

    Two gateways
    Internet gateway
    192.168.0.254 (static route 192.168.4.0 255.255.255.0 192.168.0.1)
    |
    Lan machines
    192.168.0.x dg 192.168.0.254
    |
    192.168.0.1
    VPN router.
     
    Bill Grant, Jun 8, 2006
    #3
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