Which Interfaces Support NAT?
Physical interfaces
Layer 3 Ethernet interface, Layer 3 GE interface, Layer 3 XGE interface, G.SHDSL interface, ADSL interface, VDSL interface, PON interface, serial interface, POS interface, asynchronous interface, ATM interface, BRI interface, and cellular interface
Logical interfaces
Dialer interface, tunnel interface, Layer 3 Eth-Trunk interface, Layer 3 virtual GigabitEthernet interface, VE interface, VLANIF interface, VT interface, IP-Trunk interface, MP-group interface, MFR interface, and IMA-Group interface
Sub-interfaces
Ethernet sub-interface, VE sub-interface, Eth-Trunk sub-interface, ATM sub-interface, serial sub-interface, MFR sub-interface, IMA-Group sub-interface, PON sub-interface, and POS sub-interface