DSR with LTM
Hello,
I have some questions regarding how effectively DSR mode load balancing works with LTM
Do I need to configure persistance or sticky to make DSR work? In some other vendor load balancer I have seen that persisnace configuration is mandetory (based on source IP) to get DSR working which is a problem in my opinion.
In DSR mode, can I configure Virtual IPs (VIPs) per protocol and per port at the same time? For example, if we configure VIP for DNS (port 53) it works for both TCP and UDP with no way to make it work only for UDP.
When I configure VIPs for DSR operation, I configure loopback interfaces on the real servers with the VIP IP. Is it possible to have health checks aimed to the loopback addresses of the servers instead of the addresses bound to teh ethernet interfaces? So, this way if there is no loopback (with the VIP IP) configured on the real server (may be due to config error), the VIP will fail.
I do not have a Big IP LTM in hand today and facing these problems with the current (non F5) load balancers that we have. So trying to understand if these are generic DSR problems across all platforms or spefic to particular vendors.
AM