RTR1-4321-(config-subif)#int e0/2/0.1
RTR1-4321-(config-subif)#ser?
service-policy  service-routing

RTR1-4321-(config-subif)#b?
backup  bandwidth  bfd  bgp-policy
RTR1-4321-(config-subif)#int eth 0/2/0
RTR1-4321-(config-if)#re?
% Unrecognized command

RTR1-4321-(config)#int eth 0/2/0
RTR1-4321-(config-if)#service instance 1 eth
RTR1-4321-(config-if-srv)#encapsulation dot1q 972
 Invalid configuration on ServInst 1(Et0/2/0). The VLAN ID (972) has already been configured on interface Ethernet0/2/0.1
RTR1-4321-(config-if-srv)#rewrite ingress tag pop 1 symmetric
                                    ^
% Invalid input detected at '^' marker.

RTR1-4321-(config-if-srv)#bridge-domain 1
RTR1-4321-(config-bdomain)#end