Load Balancing using NAT

This is a configuration that I´ve never implemented in any production environment, but I see quite a few cases where it can be usefull.

Step 1: Create a POOL of all the INSIDE IPs, and define the pool type: "type rotary":
 (config)#ip nat pool TASK1 10.2.2.1 10.2.2.5 prefix-length 24 type rotary

Step 2: Define an ACL with the Inside Global IP (the one we´re NAT-ing into):
 (config)#access-list 1 permit 200.2.2.2

Step 3: Do the inside NAT with the ACL 1 as the DESTINATION list, and the POOL or LOCAL IPs:
 (config)#ip nat inside destination list 1 pool ?
   WORD  Pool name for local addresses

Step 4: Define the NAT inside and outside interfaces, exactly like in case of Static/Dynamic NAT:
 (config)#int lo0
 (config-if)#ip nat inside
 (config-if)#
 (config-if)#int s0/1/0.21
 (config-subif)#ip nat outside

!!!Be sure that the routing is in place (both, go and return path towards the NAT-ed IP, 200.2.2.2)!!!

Step 5: Make sure that the IP NAT Translations are correct, and that the sources VARY:
 #sh ip nat translations
Pro Inside global      Inside local       Outside local      Outside global
tcp 200.2.2.2:23       10.2.2.1:23        131.1.12.1:20186   131.1.12.1:20186
tcp 200.2.2.2:23       10.2.2.2:23        131.1.12.1:25096   131.1.12.1:25096
tcp 200.2.2.2:23       10.2.2.3:23        131.1.12.1:20389   131.1.12.1:20389