HyperTransport™ System Architecture

Extending the Topology

Based on point-to-point links, a HyperTransport chain may be extended into a fabric, using single and multi-link devices together. Devices defined for HT include:

• Single HT link “cave” devices used to implement a peripheral function

• Single or multi-link Bridges; (HT-to-HT, or HT to one or more other protocols such as PCI, PCI-X, AGP or Infiniband)

• Multi-link Tunnel devices used to implement a function and extend a link to a neighboring device downstream, thus creating a chain

These devices are the basic building blocks for the HT fabric and are illustrated in Figure 2-11.

Figure 2-11. Basic HT Device Types

Figure 2-12 exemplifies ...