ONL provides multiple options for forwarding agents and APIs to control forwarding on switches. The options go from open api interfaces such as OpenNSL, SAI and OF-DPA to the simple netlink listener in Open Route Cache (ORC). There is also a complex full system available from (FBOSS). Each option is available via installable packages.
OpenNSL Provides a Open abstraction interface to supported Broadcom chipsets and is supported by Accton on many of their platforms.
OF-DPA is a OpenFlow focused API from Broadcom and is supported on most platforms.
SAI is a fully open multi-vendor abstraction interface that runs on switching chipsets from Broadcom, Cavium, Mellanox and more.
Routing and Switching Agents
Previous versions of ONL Supports ORC (Open Route Cache) a netlink listener which provides logical interfaces for routing protocols such as FRR, BIRD and others to run on.
ONL Supports the Facebook FBOSS fowarding agent. FBOSS currently only runs on the Wedge with other systems in the works.