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Feng_Zhang_01_1's avatar
Feng_Zhang_01_1
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Apr 07, 2014

client ip address unstable fails "source ip affinity"

We used source ip affinity in our F5 configuration, but it is not working as expected: A java client is getting load balanced to different instances within a minute. We noticed that client ip address changes after through x-forward-for address log. For example, a x-forward-for address example is "192.168.0.1, 172.16.0.1, 10.0.0.1", we can see for the failed client, the ip address we record using request.getHeader(X_FORWARDED_FOR_HEADER) some times return "192.168.0.1", sometimes return "10.0.0.1". Does anyone know the solution?

 

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  • Cory_50405's avatar
    Cory_50405
    Icon for Noctilucent rankNoctilucent
    Apr 07, 2014

    This likely isn't due to a problem with your BIG-IP. Sounds like your client could have multiple egress points in their local network. Some device in their network could also be inserting the X-forwarded-for header.

     

    Taking the X-forwarded-for header out of the mix, does the BIG-IP always see traffic sourced from the same origin IP address of the client or does it change? If you were to do a tcpdump monitoring on the virtual server IP address, you should be able to see the behavior.