Epipe global commands (for access-uplink operating mode)

config
    - service
        - epipe service-id [customer customer-id] [create] [vpn vpn-id] [svc-sap-type {null-star | dot1q-preserve | any | dot1q-range}] [customer-vid vlan-id]
        - no epipe service-id
            - description description-string
            - no description
            - sap sap-id [create] [no-endpoint] 
            - sap sap-id [create] endpoint endpoint-name
            - no sap sap-id 
            - [no] shutdown