Expand Configuration and Management Manual (H06.21+, J06.10+)

Configuring Expand-Over-IP Lines
Expand Configuration and Management Manual — 529522-013
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QIO Subsystem
Figure 8-2 illustrates the required components when an ATM 3 ServerNet adapter
(ATM3SA) is used to provide connectivity to an IP network. In this configuration, the
TCP/IP process can only be NonStop TCP/IP; NonStop TCP/IPv6 and CIP do not
support ATM communications.
QIO Subsystem
QIO is a mechanism for transferring data between processes through a shared
memory segment. The QIO subsystem is preconfigured and started during the system
load sequence. The QIO subsystem must be started and running before Expand
line-handler processes can be started.
For more information on the QIO enhancement
s that enable you to have more control
over certain aspects of memory management, see
Shared Memory Area for QIO on
page 17-48. For more information on the QIO subsystem, see the QIO Configuration
and Management Manual.
Figure 8-2. Expand-Over-IP Connectivity Components with ATM3SA
Processor
Y-Fabric
X-Fabric
ATM3SA
ATM Subsystem
QIO Shared
Memory
Segment
Expand-over-IP
Line-Handler
Process
TCP/IP
Process
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