When you create a SNAT, you can configure the BIG-IP system to automatically choose a
translation address. This ability of the BIG-IP system to automatically choose a translation
address is known as
, and in this case, the translation address that
the system chooses is always an existing self IP address. Thus, for traffic going from the BIG-IP
system to a destination server, configuring SNAT automapping ensures that the source IP address
in the header of a packet is a self IP address.