TCP/IPv6 Configuration and Management Manual (G06.29+, H06.03+, J06.03+)

HP NonStop TCP/IPv6 Configuration and Management Manual—524523-012

2-1

2 Overview of NonStop TCP/IPv6

This manual documents NonStop TCP/IPv6 only. For information about Parallel Library

TCP/IP, see the TCP/IP (Parallel Library) Configuration and Management Manual.

If run in INET mode (see Table 2-5 on page 2-19), NonStop TCP/IPv6 is a direct

replacement for Parallel Library TCP/IP. (For procedures for running NonStop

TCP/IPv6 in INET mode, see Section 5, Example Illustrations and Adding Features to

the Basic Configuration.)

This manual assumes that you understand IPv6; there is some background information

included in Appendix A, IPv6 Fundamentals as well as in this section, but you are

encouraged to read some of the many excellent resources on IPv6 (see for industry

resources). You do not need to understand IPv6 if you plan to use NonStop TCP/IPv6

in INET mode.

NonStop TCP/IPv6 adds optional IP version 6 (IPv6) functionality to the Parallel Library

TCP/IP product. The NonStop TCP/IPv6 library architecture differs dramatically from

the traditional NonStop TCP/IP process-pair architecture. (In this manual, NonStop

TCP/IP is referred to as conventional TCP/IP.) This section describes the architecture

of NonStop TCP/IPv6 and compares it to conventional TCP/IP.

Compatibility

NonStop TCP/IPv6 coexists with conventional TCP/IP on NonStop S-series servers

and on Integrity NonStop servers. An application can have sockets open in both the

NonStop TCP/IPv6 and conventional TCP/IP environments. NonStop TCP/IPv6 cannot

coexist on the same system as Parallel Library TCP/IP.

Existing TCP/IP applications using the D30 and above socket library run transparently

on NonStop TCP/IPv6 without needing to be recompiled. (Using the IPv6 functionality,

however, does require changes to the application. See NonStop TCP/IPv6 Operating

Modes on page 2-19, the TCP/IP Programming Manual, and the TCP/IPv6 Migration

Guide for information about application changes needed for IPv6.)

For more information about compatibility, see Strategy for Coexistence With

Conventional TCP/IP on page 6-26.

High-Level Comparison of the Three NonStop

Server TCP/IP Subsystems

Table 2-1 on page 2-2 summarizes the differences between conventional TCP/IP,

Parallel Library TCP/IP, and NonStop TCP/IPv6. For considerations about migrating

between these three subsystems, see the TCP/IPv6 Migration Guide.

Note. Parallel Library TCP/IP is not supported on Integrity NonStop servers.