MDONS OOF Support - IDL/Path Optimization

Assumptions

Below is the list of solvers used in OOF and its usage. The Route Optimiser package will be used for the MDONS use case as well.
Policy is not going to be involved to list the constraints for now.
Once config policies are defined for MDONS use case , OOF wil fetch these policies to get certain other constraints and apply them while running the algorithm.

OPTFRA-753 - Getting issue details... STATUS

Existing Solvers and Usage

Solver	Usage
license optimizer	VNF license optimization
pci optimizer	Pci optimization
placement optimizer	VNF placement optimization
slice optimiser	Slice selection and instantiation optimisation
route optimizer	Perform the route calculations and return the vpn-bindings for CCVPN use case

Sequence Diagram

Request from SO or SDNC

IDL request

API: POST /api/oof/mdons/route/v1

BODY:
{
   "requestInfo":{
      "transactionId":"xxx-xxx-xxxx",
      "requestId":"yyy-yyy-yyyy",
      "callbackUrl":"",
      "sourceId":"SDNC",
      "requestType":"create",
      "numSolutions":1,
      "optimizers":[
         "route"
      ],
      "timeout":600
   },
   "routeInfo":{
      "routeRequest":{
         "srcDetails":{
            "interfaceId":"interface-id-1",
            "nodeId":"node-1",
            "controllerId":"Virtuora-TAPI1"
         },
         "dstDetails":{
            "interfaceId":"interface-id-2",
            "nodeId":"node-2",
            "controllerId":"Virtuora-TAPI2"
         },
         "serviceRate":"ODU2"
      }
   }
}

Note: "Callbackurl" field will be empty . Has been added to just follow the request format standard in OOF. When SDNC sends this request the field will be empty.

Response To SDNC

Response Example

Route Selection Response

{
   "transactionId":"xxx-xxx-xxxx",
   "requestId":"yyy-yyy-yyyy",
   "requestStatus":"completed",
   "statusMessage":"success",
   "solution":{
      "routeInfo":{
         "serviceRoute":[
            {
               "srcInterfaceId":"",
               "destInterfaceId":""
            }
         ],
         "linkList":[
            "link1",
            "link2"
         ]
      }
   }
}

State Diagram

OOF Impacts

A new api should be defined in the osdfapp.py class in the optf-osdf repository for the MDONS route selection.
Under the Route Optimizer section a new class has to be added to handle the MDONS route selection.
The standard minizinc template which gives the shortest path in a graph data structure will be used for this use case, same as the CCVPN use case.

Algorithm Details

Identify if the A and Z are from the same domain controller, if yes, linkName is set to null.
If not from the same domain, retrieve all the inter domain links across both the controllers from AAI.
The links will have information such as admin-state and rate. (Note: For now we are considering only these two fields to select the appropriate inter-domain-link).
Based on the bandwidth required and available bandwidth and the status of the links (of the end points, NNIs), the appropriate link is chosen.
The link name along with the names of NNI 1 and NN2 are sent to SDNC and SDNC/DG send the details request for service-creation to the domain controller(s).