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toby_glenn_3253's avatar
toby_glenn_3253
Icon for Nimbostratus rankNimbostratus
Jun 26, 2017

Vips not Working - Strange Issue

Hi,

 

I'm new to F5's and can't seem to work this out.

 

So I have setup the device and all was working ok for our testing of Irules and health monitors for our production boxes.

 

I have setup a front end VIP and the backend pool - health monitors etc.

 

I can see on the backend node the F5 can talk to the node correctly (the health monitor appears in the IIS Logs).

 

If I disable the backend node in the pool I know the front end VIP is listening as when I disable all the machines in the pool I get my Irule HTML page which is only displayed when the pool is zero.

 

So I can talk to the front end VIP and the F5 can talk to the backend Nodes but the F5 isn't passing through the traffic?

 

Any ideas?

 

application delivery
LTM

2 Replies

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  • Mandragor's avatar
    Mandragor
    Icon for Altostratus rankAltostratus
    Jun 26, 2017

    Are you actually not seeing any client-traffic on the backend node? When testing it is probably helpful to only have 1 node enabled to ensure you know where all traffic will go.

     

    If the backend node is able to route its traffic directly to the client without going through the F5 you will have to enable sNAT on the VIP to ensure that return-traffic is going via the F5.

     

  • Samir_Jha_52506's avatar
    Samir_Jha_52506
    Icon for Noctilucent rankNoctilucent
    Jun 26, 2017

    I guess issue with the routing part. I suggest you to enable SNAT as 

    automap
    & hope it will start working. Let us know if any issue.

    Infect for verification purpose try chrome/mozila's devloper tool

    Initiate URL traffic in Chrome browser & and press 

    Ctrl+Shift+I