XORPsource has raised $5 million in first-round funding for its open-source routing software business. The company is based in Santa Clara, Calif., and does not yet have a web site. Investors include Highland Capital Partners and Onset Ventures. The firm is headed by Vivek Ragavan, former chief executive of Atrica, Redback Networks and Siara Systems, which Redback bought in 1999 for $4.3 billion.