Hello Thameem,
The ASR supports 802.1q encapsulation on sub-interfaces. It's also possible to create Layer 3 port-channels with the ASR.
The sub-interface configuration example is below -
interface F0/0/.100
encapsulation X <--- VLAN tag value
ip address x.x.x.x
The port-channel configuration example -
interface Gi0/0/0
channel-group 1 mode active
!
interface Gi0/0/1
channel-group 1 mode active
!
interface port-channel 1
ip address x.x.x.x
!
Hope this helps,
Jesse