NonStop NS-Series Planning Guide (H06.03+)

ServerNet Communications Network
HP Integrity NonStop NS-Series Planning Guide—529567-004
3-7
Example System ServerNet Pathways
replaced, the affected fabric and resources connected to it are again available to the
system.
In a second scenario, if the one of the ServerNet adapters fails, only the Fibre Channel
or Ethernet devices that are connected to the failed adapter are affected. The failure
has no effect on the other resources on the same or the other ServerNet fabric.
This illustration shows a logical representation of a complete typical 4-processor triplex
system with the X and Y ServerNet fabrics:
ESS
VST337.vsd
Logical
Processor
0
Logical
Processor
1
Logical
Processor
2
Logical
Processor
3
LSU
CPU Slice
B
CPU Slice
A
CPU Slice
C
Slice Optic Cables
PE
0
PE = processor element
PE
0
PE
0
PE
1
PE
1
PE
1
PE
2
PE
2
PE
2
PE
3
PE
3
PE
3
A B C
LSU 0
A B C
LSU 1
A B C
X Y
LSU 2
A B C
X Y
LSU 3
X Y
X Y
IOAM
X ServerNet
Switch
Y ServerNet
Switch
I/O Adapter
Module 2
I/O Adapter
Module 3
Fibre Channel
Disk Drive
Enclosure
FCAL A FCAL B
X ServerNet
Fibre Channel
FC-SCSI
Router
SCSI
Tape
SCSI
Fibre
Channel
Tape
Y ServerNet
Triplex
Processor
High-Speed Ethernet
P-Switch
X-Fabric
PICs
PICs
S-Series
I/O Enclosure
I/O
PICs
PICs
P-Switch
Y-Fabric
S-Series
I/O Enclosure
I/O
Y ServerNet
Links
X ServerNet
Links
(Slice C not
used in duplex
processor
complex)