F5 Load balancer not working, but all the configurations are successful

Hi,

Sorry if I repeat any previous posts/questions. This is a quick response intended as rough guideline.

How you troubleshoot this depends heavily on how you are setup. So here I am making some assumptions.

If you are connecting from same VLAN as VIP, all you need to do is start a quick tcpdump from CLI to confirm the client can establish a 3-WAY tcp handshake with VIP. i.e:

tcpdump -s0 -nni VLAN_NAME:nnn host YOUR_CLIENT_IP_HERE or arp or icmp

So, if you are using standard VIP you should see SYN arrive to F5 and SYN/ACK go back towards client (Check layer2 as well as layer 3 addresses please) and ACK back from CLIENT, followed by HTTP request from Client (typical 3WHS). If you see HTTP request from client, can you confirm the server is receiving this ? If you can get the first part of this puzzle then you are closer to solving the problem.

If you need more help can I suggest you paste in your VIP and pool config for everyone's benefit. Of course if the IP is sensitive to you then feel free to mask that out.

I hope that helps.

Rgds,

Alex