The json  in the  /resources/configure-examples/logical-sff/json/service-functions.json

is 

{
"service-functions": {
"service-function": [
{
"name": "firewall-1",
"type": "firewall",
"sf-data-plane-locator": [

{ "name": "firewall-dpl", "interface-name": "eccb57ae-5a2e-467f-823e-45d7bb2a6a9a", "transport": "service-locator:eth-nsh", "service-function-forwarder": "sfflogical1" }

]
},

 

while "eth-nsh' can not be identified.