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 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.
