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ODL-SDNi Developer Guide

Overview

This project aims at enabling inter-SDN controller communication by developing SDNi (Software Defined Networking interface) as an application (ODL-SDNi App).

ODL-SDNi Architecture

  • SDNi Aggregator: Northbound SDNi plugin acts as an aggregator for collecting network information such as topology, stats, host etc. This plugin can be evolving as per needs of network data requested to be shared across federated SDN controllers.
  • SDNi API: API view autogenerated and accessible through RESTCONF to fetch the aggregated information from the northbound plugin – SDNi aggregator.The RESTCONF protocol operates on a conceptual datastore defined with the YANG data modeling language.
  • SDNi Wrapper: SDNi BGP Wrapper will be responsible for the sharing and collecting information to/from federated controllers.
  • SDNi UI:This component displays the SDN controllers connected to each other.

SDNi Aggregator

  • SDNiAggregator connects with the Base Network Service Functions of the controller. Currently it is querying network topology through MD-SAL for creating SDNi network capability.
  • SDNiAggregator is customized to retrieve the host controller’s details, while running the controller in cluster mode. Rest of the northbound APIs of controller will retrieve the entire topology information of all the connected controllers.
  • The SDNiAggregator creates a topology structure.This structure is populated by the various network funtions.

SDNi API

Topology and QoS data is fetched from SDNiAggregator through RESTCONF.

http://${controlleripaddress}:8181/apidoc/explorer/index.html

http://${ipaddress}:8181/restconf/operations/opendaylight-sdni-topology-msg:getAllPeerTopology

Peer Topology Data: Controller IP Address, Links, Nodes, Link Bandwidths, MAC Address of switches, Latency, Host IP address.

http://${ipaddress}:8181/restconf/operations/opendaylight-sdni-qos-msg:get-all-node-connectors-statistics

QOS Data: Node, Port, Transmit Packets, Receive Packets, Collision Count, Receive Frame Error, Receive Over Run Error, Receive Crc Error

http://${ipaddress}:8181/restconf/operations/opendaylight-sdni-qos-msg:get-all-peer-node-connectors-statistics

Peer QOS Data: Node, Port, Transmit Packets, Receive Packets, Collision Count, Receive Frame Error, Receive Over Run Error, Receive Crc Error

SDNi Wrapper

SDNiWrapper

SDNiWrapper

  • SDNiWrapper is an extension of ODL-BGPCEP where SDNi topology data is exchange along with the Update NLRI message. Refer http://tools.ietf.org/html/draft-ietf-idr-ls-distribution-04 for more information on NLRI.
  • SDNiWrapper gets the controller’s network capabilities through SDNi Aggregator and serialize it in Update NLRI message. This NLRI message will get exchange between the clustered controllers through BGP-UPDATE message. Similarly peer controller’s UPDATE message is received and unpacked then format to SDNi Network capability data, which will be stored for further purpose.

SDNi UI

This component displays the SDN controllers connected to each other.

http://localhost:8181/index.html#/sdniUI/sdnController

API Reference Documentation

Go to http://${controlleripaddress}:8181/apidoc/explorer/index.html, sign in, and expand the opendaylight-sdni panel. From there, users can execute various API calls to test their SDNi deployment.