NonStop NS-Series Planning Guide (H06.05+)

Control, Configuration, and Maintenance Tools
HP Integrity NonStop NS-Series Planning Guide—529567-008
B-10
Fault-Tolerant Configuration
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IOAM module 3 ServerNet board for OSM control of the I/O hardware
•
Connections to both X and Y fabrics (for fault tolerance) for OSM system-up
maintenance (any one of these connections is valid as long as there are at least
two connections total):
°
Gigabit 4-port ServerNet adapters (G4SAs) installed in an IOAM enclosure
°
Ethernet 4-port ServerNet adapters (E4SAs), Fast Ethernet ServerNet
adapters (FESAs), or Gigabit Ethernet ServerNet adapters (GESA) installed in
a NonStop S-series I/O enclosure with IOMF 2 CRUs
•
UPS (optional) for power-fail monitoring
•
Fibre Channel to SCSI converter (optional) for Fibre Channel tape
Fault-Tolerant Configuration
You can configure the dedicated service LAN as described in the OSM Migration
Guide. HP recommends that you use a fault-tolerant LAN configuration. A fault-tolerant
configuration includes these connections to two maintenance switches:
•
A system console to each maintenance switch
•
Processor switch on the X fabric to the first maintenance switch
•
Processor switch on the Y fabric to the second maintenance switch
•
One of the two IOAM enclosure ServerNet switch boards to each maintenance
switch.
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G4SA, E4SA, FESA, or GESA on the X fabric to the first maintenance switch
•
G4SA, E4SA, FESA, or GESA on the X fabric to the second maintenance switch
Caution. To avoid possible conflicts on the LAN:
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If the configuration includes two maintenance switches, install and configure one switch
completely, including assigning its IP address, before you install the other.
•
Only one connection between the maintenance switches is permitted. More than one
connection overloads network traffic, rendering the dedicated service LAN unusable.
•
If ServerNet switch boards in the IOAM enclosure or p-switches will have static IP
addresses, configure one completely, including assigning the IP address, before you
configure the other.