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Forum Discussion

ucirl_161922's avatar
ucirl_161922
Icon for Nimbostratus rankNimbostratus
Jul 08, 2014

F5 traffic not hitting the default pool

Hi,   We're having an issue at the moment with F5 traffic appearing to hit the virtual server but is not being passed to the default pool. The default gateway has been set to the F5 gateway. I hav...
application delivery
deployment
LTM
Kevin_Stewart's avatar
Kevin_Stewart
Icon for Employee rankEmployee
Jul 08, 2014

If I may add, this almost always relates to a routing or configuration issue. Assuming you've purposefully applied the pool to the VIP, and that you see traffic arriving at the VIP, then you should be looking at routing.

 

  1. Does the BIG-IP have a route to the server? If not in a local subnet, does the BIG-IP have a route established to tell it how (gateway, VLAN, interface) it should travel to get to the server.

     

  2. If in a local subnet, does the BIG-IP have a self-IP on that subnet?

     

  3. If you TCPDUMP on the various VLANs, do you see the traffic attempting to leave but potentially go unanswered? If you never see it leave the box, then you can almost assume a routing issue (the BIG-IP doesn't know at all how to get there).

     

  4. If you see the traffic leave the box, what source address does it use? If not a local SNAT address, is it something that the server can route directly to?