Static NAT allows a switch to modify the source or destination IP address, and optionally the Layer 4 port, of packets traversing it. Each static NAT rule is explicitly defined by the user and specifies a one-to-one mapping between an original IP address and a translated IP address.

The packet path, prerequisites, and restrictions listed in this document apply to this feature as well Dynamic Twice NAT is a variant of the dynamic NAT feature where both the source and destination IP can be modified while forwarding a packet. One of the IP addresses will be dynamically assigned, while the other will be statically assigned.