In computer networking, the Tunnel Setup Protocol (TSP) is a networking control protocol used to negotiate IP tunnel setup parameters between a tunnel client host and a tunnel broker server, the tunnel end-points. The protocol is defined in RFC 5572. A major use of TSP is in IPv6 transition mechanisms. In computer networking, the Tunnel Setup Protocol (TSP) is a networking control protocol used to negotiate IP tunnel setup parameters between a tunnel client host and a tunnel broker server, the tunnel end-points. The protocol is defined in RFC 5572. A major use of TSP is in IPv6 transition mechanisms.