Sorry, you might need to be a bit clearer in your description...
Do you mean you have the same subnet on eth0 (Mgmt interface) and a VS? (Which is invalid). Or is that eth0 a different server? Where does 192.168.122.10 come into it?
Or is that just text that you forgot to wrap preformated around?
Things to check (Assuming it's a badly formatted 'diagram')
- Is the self-ip configured to accept and respond to ping?
- Do you have multiple interfaces on the same subnet?
- Are you getting an ARP response from the BigIP back to the Linux box? (arp -an|grep 192.168.122.4)
- Can you see echo-request leaving the Linux box destined for the correct MAC? (tcpdump)
- Can you see traffic incoming on interface 1.2 from the Linux box? (Hint. Use tcpdump)
- If you see traffic inbound, do you see ARP and echo-request? What about echo-reply?
- What if you tcpdump on ALL interfaces and not just 1.2?
Nimbostratus
