Multiple HTTPS sites on a single IP

You have two Virtual Servers based on this error message:

Virtual Server /Common/sub2 illegally shares destination address, source address, service port, ip-protocol, and vlan with Virtual Server /Common/sub1

The error message says that your trying to use the same IP address and port for both Virtual Servers. How would traffic know to go to Virtual Server A over Virtual Server B? SNI (as I understand it) is for matching a domain to a certificate so that multiple domains can be used for one Virtual Server. I don't think it has anything to do with routing in the sense of directing traffic for at least how I've used it.

In the end, a virtual server is a listener and just like you can't have two hosts with the same IP address on a network, due to the obvious IP conflict, you cannot have two Virtual Servers with the same IP address and Port. You can have the same IP address with a different port (i.e. 10.0.10.10:443 and 10.0.10.10:22).