How to enable VFR (fragmented packets) on Cisco 2801?

Question

Computer networks

Is available cisco 2801 and there is a need to include VFR.
I do:
Conf t
in fa0/1
but there is simply no ip virtual-reassembly command.
Question: how does it turn on in 2801?

Answer 1

nat enable on interface

Answer 2

Check your IOS version. Perhaps this functionality is disabled in the installed version.