NonStop S-Series Planning and Configuration Guide (G06.29+)

Topologies

HP NonStop S-Series Planning and Configuration Guide—523303-021

3-3

ServerNet Topologies

The ServerNet topologies are based on the tetrahedral topology. The connections

between the first four processor enclosures of a system form a tetrahedron.

If a system has more than four processor enclosures, each additional enclosure is

connected to one of the first four enclosures, at a vertex or corner of the tetrahedron.

See page 3-5.

I/O enclosures and IOAM enclosures are connected to processor enclosures.

The ServerNet topologies currently supported for NonStop S-series servers are:

The Tetra 8 and Tetra 16 topologies are cabled differently. When you start a system for

the first time, you must specify one of the topologies in the system configuration

software. To change topologies requires that you shut down the system.

Tetra 8 topology Maximizes the performance of four processor enclosures, but does

not support more than four processor enclosures (eight processors)

and limits the number of I/O enclosures.

Tetra 16 topology Allows a maximum of eight processor enclosures (16 processors) and

allows more I/O enclosures than the Tetra 8 topology.

VST949.vsd

Tetrahedron