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Router Node 63
Figure 26. Partitioning
Normally, RS/6000 SP nodes in different partitions cannot communicate with
each other through the SP Switch. The GRF plays a unique role here by
allowing RS/6000 SP nodes to communicate across partitions, when each
partition contains at least one SP Switch router adapter, and these adapters
are interconnected by TCP/IP.
The requirements for partitioning are the same as those for coexistence, with
the addition of having at least one free SP Switch port per partition, to
connect to the SP Switch router adapter.
2.5 Planning for the GRF
Before acquiring any model of the SP Switch Router, ensure that there are
SP Switch ports available in the designated partition, and that the switch used
in the RS/6000 SP is the 8-port or 16-port SP Switch.
PSSP 2.4
CWS
Ethernet
Cable
RS232
Cable
Switch
Frame
Partition B
Partition A
Cross-partition communication
through the SP Switch
Partition A
Partition B
SDR
GRF 1600/400
IP Switch
Control
Board
Crosspoint
Switch
4-port FDDI
SP Switch
SP Switch