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Fastpath Ethernet research-Alcalá University and Carlos III University

Campus Universitario, Edificio Politécnico, Crta. NII
ZIP Code
Alcalá de Henares

Company Profile:
Alcalá University and Carlos III University offer the patent licence for protocols for Fastpath Ethernet switches, a new concept of simple and compatible all-links Ethernet switch that avoids link blocking by spanning tree and provides shortest path performance. It has been implemented successfully on Linux and Openflow/NetFPGA boards.

ARP-Path Shortest Path Bridges (FastPath Ethernet Transparent Bridges)

What we offer:
Most current proposals for Advanced Ethernet Bridges and Routing Bridges use link state protocol to compute shortest paths or multiple shortest path spanning trees. Although Link state protocols like IS-IS are mature and have good performance, they require full topology knowledge and high computation. They also require synchronization mechanisms between the bridges before setting ports in forwarding state to adequately prevent transient loops.

Fastpath (also known as ARP-Path) is a radical departure from this approach. It is a natural evolution of the transparent bridge paradigm to implement near shortest path bridging (or strictly shortest, depending on the loop prevention mechanism). Instead of interchanging topology information, short unicast paths and source rooted multicast trees are built directly in the data plane without any ancillary routing protocol, just by controlled flooding (to bridges or to hosts) of an on-demand or periodically broadcasted beacon frame. The fastest unicast path in transmission direction, among the paths permitted by the loop prevention mechanism, gets selected at every bridge. This path is then confirmed as a bidirectional, symmetric path, after reception of the unicast reply frame from the destination host or bridge(s). In this way, unicast paths and/or source rooted spanning trees are set up directly in the data plane.
The proposed FastpathUD protocol prevents loops by enforcing a simple and limited prohibition of some turns of frames at bridges (down-up turns only, around one fifth of the total possible turns), instead of the full link prohibition applied by the spanning tree protocol. Throughput is close to that of shortest path protocols. Alternative mechanisms for loop prevention may be used to attain full shortest paths performance.
The resulting architecture requires zero-configuration, uses standard Ethernet frame format, relies on standard Rapid Spanning Tree Protocol, is fully transparent to hosts with or without frame encapsulation, and compatible with 802.1D bridges in core-island mode

What we are looking for:
The group is looking for big companies or SMEs manufacturers of routers, switches.

They also look for Ethernet switch manufacturers and investors on patent portfolios.

The tasks to be performed of the partner sought would be the support in financial collaboration for international patent protection and for advanced, pure hardware prototype construction and validation.


Mr Guillermo Ibáñez

Professor/Researcher from the Automatic Department
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