A BIG-IP system has the following configuration:

* SNAT is set to Auto Map

* There are two VLANs internal and external

* Default route is pointed to the gateway on external VLAN

* Self P for internal VLAN is 1921.1.2

* Self IP for external VLAN is 192.1.2.2

* Floating IP addresses for internal VLAN is 192.1.1.1

* Floating IP addresses for external VLAN is 192.1.2.1

* The Virtual Server IP address is 192.1.1.100

Which IP address does the BIG-IP system use first when traffic reaches the servers on the internal VLAN?