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Args:
ietf_intent (dict): IETF-formatted network slice intent.
Returns:
dict: A TeraFlow service request for L3VPN configuration.
"""
# Hardcoded router endpoints
# TODO should be dynamically determined
origin_router_id = ietf_intent["ietf-network-slice-service:network-slice-services"]["slice-service"][0]["sdps"]["sdp"][0]["attachment-circuits"]["attachment-circuit"][0]["sdp-peering"]["peer-sap-id"]
origin_router_if = '0/0/0-GigabitEthernet0/0/0/0'
destination_router_id = ietf_intent["ietf-network-slice-service:network-slice-services"]["slice-service"][0]["sdps"]["sdp"][1]["attachment-circuits"]["attachment-circuit"][0]["sdp-peering"]["peer-sap-id"]
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destination_router_if = '0/0/3-GigabitEthernet0/0/0/3'
# Load L3VPN service template
self.__load_template(2, os.path.join(TEMPLATES_PATH, "L3-VPN_template_empty.json"))
tfs_request = json.loads(str(self.__teraflow_template))["services"][0]
# Generate unique service UUID
tfs_request["service_id"]["service_uuid"]["uuid"] += "-" + str(int(datetime.now().timestamp() * 1e7))
# Configure service endpoints
for endpoint in tfs_request["service_endpoint_ids"]:
endpoint["device_id"]["device_uuid"]["uuid"] = origin_router_id if endpoint is tfs_request["service_endpoint_ids"][0] else destination_router_id
endpoint["endpoint_uuid"]["uuid"] = origin_router_if if endpoint is tfs_request["service_endpoint_ids"][0] else destination_router_if
# Add service constraints
for i, constraint in enumerate(tfs_request["service_constraints"]):
bound = ietf_intent["ietf-network-slice-service:network-slice-services"]["slo-sle-templates"]["slo-sle-template"][0]["slo-policy"]["metric-bound"][i]["bound"]
constraint["custom"]["constraint_value"] = str(bound)
# Add configuration rules
for i, config_rule in enumerate(tfs_request["service_config"]["config_rules"][1:], start=1):
router_id = origin_router_id if i == 1 else destination_router_id
router_if = origin_router_if if i == 1 else destination_router_if
resource_value = config_rule["custom"]["resource_value"]
sdp_index = i - 1
vlan_value = ietf_intent["ietf-network-slice-service:network-slice-services"]["slice-service"][0]["sdps"]["sdp"][sdp_index]["service-match-criteria"]["match-criterion"][0]["value"]
resource_value["router_id"] = destination_router_id if i == 1 else origin_router_id
resource_value["vlan_id"] = int(vlan_value)
resource_value["address_ip"] = destination_router_id if i == 1 else origin_router_id
resource_value["policy_AZ"] = "policyA"
resource_value["policy_ZA"] = "policyB"
resource_value["ni_name"] = 'ELAN{:s}'.format(str(vlan_value))
config_rule["custom"]["resource_key"] = f"/device[{router_id}]/endpoint[{router_if}]/settings"
return tfs_request