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bman_12685's avatar
bman_12685
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Sep 20, 2012

npath routing to a vm - how to test

Hello, it might be perhaps the way I am testing but I haven't found allot of references pertaining to the example I am using.

 

I have setup the ltm side per the documents for ltm version 11.2.0 setup a vip via ipip and setup a loopback and a tunnel interface on the linux guest.

 

When I initialize a tcp connection from a client system to the vip on the ltm I see the request via tcpdump on the linux real server, however it never completes, the client side hangs and eventually times out, does anyone have any experience with this?

 

Could this be perhaps that I need to setup a one to one nat from my firewall to the vip so that the ipip vip passes the traffic in a way that the guest routes the traffic back outbound the firewall?

 

Or could this be perhaps some setting via proc ( i have tried ip forwarding ) on the VMM(virtual machine monitor (vmware hypervisor))?

 

has anyone else done npath with a virtual machine?

 

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vmware
  • bman_12685's avatar
    bman_12685
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    Oct 04, 2012
    In case anyone else has some issues with this later.

     

     

    There are no issues w doing npath on a vm, make sure nat-translation is disabled.

     

     

    Debugging cannot be done on the loopback interface some can be done on the tunneled interface.

     

     

    ip forwarding need not be enabled and a route need not be set in my case even if the rip and vip were on different subnets, the tunnel interface has a route set for the ip it listens on which is the RIP.

     

     

    hope this helps