Networking tech startup Plexxi has raised $20.1 million in Series C funding from its existing investors Lightspeed Venture Partners, Matrix Partners and Northbridge Venture Partners. The round brings its total capital raised to $48.48 million.

The fresh cash will be used to “accelerate sales, marketing and roadmap investments”.

Plexxi earlier this month kicked off its initial private beta program after operating in stealth mode for quite a while.

The Cambridge, Massachusetts company is working on an integrated hardware/software offering that essentially allows data center operators to build and manage a network from the perspective of the needs of the application workloads, which Plexxi refers to as ‘affinity networking’.

More to come when the company launches its solution in public beta.

Plexxi was co-founded by Dave Husak (formerly of Reva Systems), Ephraim Dobbins (ex-Acme Packet) and Mat Mathews (previously with Arbor Networks).

It currently has about 30 employees.