This is my inward-facing, ethernet interface:
interface FastEthernet0 description LAN ip address 10.1.1.1 255.255.255.0
This is what happens when I create a sub-interface (Fa0.1) and try to give it dot1Q configuration:
Router_1700(config-subif)#encapsulation dot1q 2 ^ % Invalid input detected at '^' marker.
sh ver shows I have 12.2(29a) on this router.
What am I missing?