1. Create two PBB sub-interfaces:

"PUT /restconf/config/ietf-interfaces:interfaces/interface/GigabitEthernet0%2F8%2F0/sub-interfaces:sub-interfaces/sub-interface/0 HTTP/1.1" 200 0
{"sub-interface": [{"admin-status": "up", "enabled": "true", "vlan-type": "dot1ah-types:802dot1ah", "pbb":

{"i-tag-isid": "20", "destination-address": "bb:bb:bb:bb:bb:dd", "b-vlan-tag-vlan-id": "10", "source-address": "aa:aa:aa:aa:aa:cc"}

, "identifier": "0", "oper-status": "up"}]}

"PUT /restconf/config/ietf-interfaces:interfaces/interface/GigabitEthernet0%2F8%2F0/sub-interfaces:sub-interfaces/sub-interface/1 HTTP/1.1" 200 0
{"sub-interface": [{"admin-status": "up", "enabled": "true", "vlan-type": "dot1ah-types:802dot1ah", "pbb":

{"i-tag-isid": "40", "destination-address": "bb:bb:bb:bb:dd:bb", "b-vlan-tag-vlan-id": "30", "source-address": "aa:aa:aa:aa:cc:aa"}

, "identifier": "1", "oper-status": "up"}]}

2. Get the oper data:

"GET /restconf/operational/ietf-interfaces:interfaces-state HTTP/1.1" 200 None
Response: {"interfaces-state":{"interface":[{"name":"GigabitEthernet0/9/0","speed":1000000000,"admin-status":"down","if-index":3,"sub-interfaces:sub-interfaces":{},"ietf-ip:ipv4":{},"phys-address":"08:00:27:5b:b6:e0","type":"iana-if-type:ethernetCsmacd","oper-status":"down","v3po:ethernet":{"mtu":9216,"duplex":"full"}},{"name":"GigabitEthernet0/8/0","speed":1000000000,"admin-status":"up","if-index":2,"sub-interfaces:sub-interfaces":{"sub-interface":[{"identifier":1,"oper-status":"up","ipv4":{},"vlan-type":"dot1ah-types:802dot1ah","admin-status":"up","speed":1000000000,"pbb":{"i-tag-isid":40,"destination-address":"bb:bb:bb:bb:dd:bb","b-vlan-tag-vlan-id":30,"source-address":"aa:aa:aa:aa:cc:aa"}}]},"ietf-ip:ipv4":{},"phys-address":"08:00:27:92:bb:26","type":"iana-if-type:ethernetCsmacd","oper-status":"up","v3po:ethernet":{"mtu":9216,"duplex":"full"}},{"name":"local0","admin-status":"down","if-index":1,"sub-interfaces:sub-interfaces":{},"ietf-ip:ipv4":{},"type":"iana-if-type:ethernetCsmacd","oper-status":"down"},{"name":"GigabitEthernet0/8/0.0","speed":1000000000,"admin-status":"up","if-index":4,"sub-interfaces:sub-interfaces":{},"ietf-ip:ipv4":{},"type":"iana-if-type:ethernetCsmacd","oper-status":"up","v3po:ethernet":{"mtu":9216,"duplex":"full"}}]}}

There is only GigabitEthernet0/8/0.0, GigabitEthernet0/8/0.1 is missing.

Check using VPP CLI (everything is ok):
lab@BM:~$ sudo vppctl sh int
Name Idx State Counter Count
GigabitEthernet0/8/0 1 up
GigabitEthernet0/8/0.0 3 up
GigabitEthernet0/8/0.1 4 up
GigabitEthernet0/9/0 2 down
local0 0 down
lab@BM:~$

lab@BM:~$ sudo vppctl sh ver
vpp v16.12-rc0~94-g2d46cd5 built by root on BM at Mon Sep 19 15:43:13 CEST 2016
{"version":

{"name":"vpe","build-date":"Mon Sep 19 15:43:13 CEST 2016","build-directory":"/home/lab/vpp","branch":"16.12-rc0~94-g2d46cd5"}

}