CISCO ASR 12000 NAT configuration

[vikrant1307]

I am trying to migrate configuration from CISCO IOS device to cisco ASR 12000 router.

If someone can share equivalent configuration of below cisco IOS command in cisco ASR 12000.

"ip nat inside source list 111 interface FastEthernet0/0.700 overload"

[MHM Cisco World]

you run IOS XR which ver. ?

[vikrant1307]

@MHM Cisco World 
It is 4.2.3 version

[MHM Cisco World]

I know little about IOS XR but I am sure it different than IOS and IOS XE 
below is guide to config the CG NAT in IOS XR 
you can use NAT to Pool instead of overload 
https://www.cisco.com/c/en/us/td/docs/routers/crs/software/crs-r6-4/cgnat/command/reference/b-cgnat-cr-crs-64x/b-cgnat-cr-crs-64x_chapter_01.html#wp2900083483

[vikrant1307]

I am not able to find CG NAT CLI on my ASR node?
If any idea we need to install some extra package on node to get the CG NAT Configuration CLI?