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

Planning a Network Design
Expand Configuration and Management Manual — 529522-013
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Asynchronous Transfer Mode (ATM) Networks
When you are planning your Expand-over-IP environment, you can use LNP to control
over which network interfaces (IP addresses) the Expand line-handler processes run.
For examples of working with logical network partitioning, see Step 1 (B): Select a
Process and SUBNET for NonStop TCP/IPv6 Use on page 8-11.
To determine which TCP/IP subsystem is running on your system, use the SCF
LISTDEV TCPIP command. The text after the last period (.) in the Program field on the
far right of the display is either TCPIP, which identifies the process as a conventional
NonStop TCP/IP process or TCP6SAM, which identifies the process as a NonStop
TCP/IPv6 process. NonStop TCP/IP can coexist on the system with NonStop
TCP/IPv6.
For more information on LNP and about NonStop TCP/IPv6, see the TCP/IPv6
Configuration and Management Manual and the TCP/IPv6 Migration Manual. For more
information on NonStop TCP/IP, see the TCP/IP Configuration and Management
Manual.
The CIP subsystem does not require a matching-processor configuration for the
CIPSAM and Expand line-handler processes. Like NonStop TCP/IPv6, CIP transport
service provider processes (CIPSAM) provide access to all configured Internet
interfaces. Also, CIP can be configured to restrict its communications to a single CLIM.
Unlike NonStop TCP/IPv6, CIP cannot be restricted to a particular interface on that
CLIM. For more information on CIP, see the Cluster I/O Protocols (CIP) Configuration
Management Manual.
Asynchronous Transfer Mode (ATM) Networks
Asynchronous Transfer Mode (ATM) technology is based on the efforts of the
International Telecommunication Union Telecommunication Standardization Sector
(ITU-T) Study Group XVIII to develop Broadband Integrated Services Digital Network
(BISDN) for the high-speed transfer of voice, video, and data through public networks.
ATM is a cell-switching and multiplexing technology that combines the benefit
s of
circuit switching (constant transmission delay and guaranteed capacity) with those of
packet switching (flexibility and intermittent traffic). ATM is a connection-oriented
environment.
The Expand-over-ATM line-handler process uses the HP ATM subsystem to implement
Expand-over-ATM connectivity. The Expand-over-ATM line-handler process
communicates with the ATM subsystem through the shared memory of the QIO
subsystem.
The major benefits of Expand-over-ATM connections are:
•
Flexibility. No modifications need to be made to Expand applications to allow them
to run over ATM networks. A NonStop server that can access an ATM network can
be part of the Expand network.
Note. The ITU-T carries out the functions of the former Consultative Committee for
International Telegraph and Telephone (CCITT).