Operating System/400, 5769-SS1
524 AS/400e System Handbook
• X.25 (PVC and SVC)
• X.25 over ISDN
• Integrated PC Server LAN
• Asynchronous support
• Synchronous support
• ATM (LAN emulation)
• Twinax
The base protocols are implemented within OS/400 and OS/400 microcode for excellent
performance, security, and stability. The base protocols include:
• Transmission Control Protocol (TCP)
• User Datagram Protocol (UDP)
• Internet Protocol (IP)
• Internet Control Message Protocol (ICMP)
• Address Resolution Protocol (ARP)
Software Migration and Upgrade Paths
e-Jump and Single-Step Upgrades
e-Jump, in conjunction with the Enhanced Upgrade Assistant Tool, upgrades to OS/400
V4R4 in one step.
OS/400 V4R5 is the last release to offer single step CISC-to-RISC upgrade capabilities from
V3R2. OS/400 V4R4 is the last release to offer single step CISC-to-RISC upgrade (previously
referred to as e-Jump) capabilities from V2R3, V3R0.5, and V3R1 systems.
For single step CISC-to-RISC upgrades from V3R2 to V4R5, use the Enhanced Upgrade
Assistant (5798-TBU). For single step CISC-to-RISC upgrades from V2R3, V3R0.5, V3R1,
and V3R2 to V4R4, use the Enhanced Upgrade Assistant (5798-TBU).
Single step RISC-to-RISC upgrades from V4R1, V4R2, V4R3, and V4R4 to V4R5 are
supported using a normal upgrade procedures and are documented in the software
installation manual. If a new RISC AS/400 server replaces an existing RISC AS/400 server,
feature #0205 may be ordered against the hardware to restrict the preload of all software
except SLIC and the basic functions of OS/400. This allows the remaining libraries to be
migrated from the existing system to the new system.
Refer to the following section to identify the supported upgrade paths for RISC systems.
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