NonStop NS14000 Planning Guide (H06.10+)

VIO Enclosure ServerNet Connections
ServerNet connections to the system I/O devices (storage disk and tape drive as well as Ethernet
communication to networks) radiate out from the VIO enclosures for both the X and Y ServerNet
fabrics. (VIO enclosure module 2 provides X fabric connectivity, and VIO enclosure module 3
provides Y fabric connectivity.)
I/O configurations in Integrity NonStop NS14000 systems are flexible, with few restrictions.
Those few restrictions prevent I/O configurations that compromise fault tolerance or high
availability, especially with disk storage as outlined in “Configuration Restrictions for Fibre
Channel Devices” (page 87).
This illustration shows an example of a fault-tolerant ServerNet configuration connecting four
Fibre Channel ports, two in each VIO module, to a pair of Fibre Channel disk modules:
Internal ServerNet Interconnect Cabling 83