How to terminate a vlan on ASR 9000 and bridge it to a port on asr 9000

we want to use the ASR to connect a client which has no vlan tag and add a vlan tag 100 on it when the traffic goes out from ASR to internet.


CLIENT --------- ASR ------TRUNK-------Internet PE


Here the configuration example:

!
interface GigabitEthernet0/0/0/0.100 l2transport
  encapsulation dot1q 100
  rewrite ingress tag pop 1 symmetric
!

!
interface GigabitEthernet0/0/0/1
  l2transport
!

!
l2vpn
!
bridge group cust1
  bridge-domain cust1
   interface GigabitEthernet0/0/0/0.100
   interface GigabitEthernet0/0/0/1
!  

• GigabitEthernet0/0/0/1 is the access port (untagged).
• interface GigabitEthernet0/0/0/0.100 accepts tagged frames with vlan 100.
• L2vpn bridge-domain cust1 connects both interfaces together.
• GigabitEthernet0/0/0/0.100 has tag rewrite operation. Removing tag on ingress, so sending untagged to GigabitEthernet0/0/0/1, and pushing tag 100 on egress, so untagged frames from gi0/0/0/1 got tagged