Distributed Name Service (DNS) Management Programming Manual

Networking Restrictions
Update for D-Series Operating Systems
46958 Tandem Computers Incorporated I–11
Connections Not Permitted General restrictions on inter-node communications between a D-series system and a
C-series system are:
High-PIN processes cannot access processes in a C-series system.
Processes in a C-series system cannot access the high-PIN processes in a D-series
system.
Figure 1-2 illustrates connections not permitted in a hybrid network of D-series and C-
series systems:
Figure I-4. Connections Not Permitted
D-Series D-Series
C-Series
D-Series D-Series
C-Series
Network View From a D-Series High PIN ($PRO1)
Network View From a C-Series PIN ($PRO5)
$PRO1 $PRO3
$PRO2 $PRO4 $PRO5
$PRO1
$PRO2
$PRO3
$PRO4
$PRO5
Legend
High PIN
Low PIN
008
Not permitted