+..
+ TODO: Is it possible to test a NAT44ed scenario where the outside source
+ address and port is limited to just one value?
+ In theory, as long as every inside source address&port traffic
+ uses a different destination address&port, there will be no conflicts,
+ and we could use bidirectional stateless profiles.
+ Possibly, VPP requires some amount of outside source address&port
+ to remain unused for security reasons. But we can try to see what happens.
+
+In order to excercise NAT44ed ability to translate based on both
+source and destination address and port, the inside-to-outside traffic
+varies also destination address and port. Destination port is the same
+as source port, destination address has the same offset as the source address,
+but applied to different subnet (starting with 20.0.0.0).
+
+As the mapping is not deterministic (for security reasons),
+we cannot easily use stateless bidirectional traffic profiles.
+Outside address and port range is fully covered,
+but we do not know which outside-to-inside source address and port to use
+to hit an open session of a particular outside address and port.
+
+Therefore, NAT44ed is benchmarked using following methodologies:
+
+- Unidirectional throughput using *stateless* traffic profile.