NonStop NS14000 Planning Guide (H06.08+)

Cable Length Restrictions
Maximum allowable lengths of cables connecting the modular system components are:
Product IDMaximum LengthConnectorsFiber TypeConnection
M8900nnn1
100 mLC-LCMMFNonStop Blade
Element to LSU
enclosure
M8920nnn1
50 mMTPMMFNonStop Blade
Element to NonStop
Blade Element
M8900nnn1
125 mLC-LCMMFLSU enclosure to VIO
enclosure
M8900nnn1
50mLC-LCMMFVIO enclosure to VIO
enclosure (cross-link
connection)
M8900nnn1
250 mLC-LCMMFVIO enclosure (Fibre
Channel port) to Fibre
Channel disk module
M8900nnn1
250 mLC-LCMMFVIO enclosure (Fibre
Channel port) to ESS
M8900nnn1
250 mLC-LCMMFVIO enclosure (Fibre
Channel port) to FC
switch
M8900nnn1
100 mLC-LCMMFVIO enclosure to
cluster switch 6780
1 nnn indicates the length of the cable in meters. For example, M8900125 is 125 meters long; M8900-15 is 15 meters
long.
Although a considerable cable length can exist between the modular enclosures in the system,
HP recommends placing all cabinets adjacent to each other and bolting them together, with cable
length between each of the enclosures as short as possible.
Internal Cable Product IDs
For product IDs, see Internal Cables on page A-1.
NonStop Blade Elements to LSU
Fiber-optic cables provide communications between each NonStop Blade Element and the LSU
as well as between the LSU and the VIO enclosure. The ServerNet X fabric and Y fabric provide
the system I/O from the LSU to the VIO enclosure, with Fibre Channel and high-speed Ethernet
links providing connections to storage and communications LANs, WANs, and so forth.
Cable connections between the NonStop Blade Elements and the LSU optics adapters affect
proper processor synchronization and rendezvous. For each logical processor element (PE), the
port for a particular PE, such as PE1 (NonStop Blade Element port J0) on DMR NonStop Blade
Elements A and B or TMR NonStop Blade Elements A, B, and C, must connect to their respective
ports on the LSU optics adapters as shown in the example connection diagrams in “LSU to VIO
Enclosure and Processor IDs”. Although you can randomly select LSU optics adapters for
fiber-optic cable connections, HP recommends connecting these cable to the LSUs in sequential
order as shown in the connection diagrams.
80 System Configuration Guidelines