PROBLEM: Pool Member Won't Work Through Big IP LTM

I am pleased to note we have made significant process in identifying the issue. It appears that every server on the same vlan as the F5 self IPs and virtual servers (management is on a different vlan) will not work as expected when reached through the virtual server but will work as expected when reached directly.

 

 

What we did was begin systematically going through every server we could test with a specific process we could telnet to to verify functionality on the affected vlan and after several failures with no successes, we went ahead and started doing the same thing on other vlans and were 100% successful with no failures. We then went ahead and relocated one of the virtual servers from the affected vlan to another and it worked fine.

 

 

We were clouded on the issue because we thought we had servers (both physical and virtual) on the affected vlan that were working, but upon closer examination, we witnessed that only pool members on other vlans were fielding traffic properly.

 

 

My colleague wants to go ahead to do further testing with wireshark to see what incoming F5 packets look like on affected servers (although I don't believe the packets are reaching the affected servers at all) before we look into it further.

 

 

We have only one active interface and it's in the untagged column of the VLAN configuration but I'm wondering if specifying the VLAN in the upper section where internal is named is somehow contributing to the issue.