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Document ID: MIGR-47TMCW |
Network Station - AS/400: Boot Monitor Notes - II10938
Applicable to: World-Wide
AS/400: Boot Monitor Notes - II10938
About This Document
This document includes information about the IBM Network Station and IBM Network Station Manager AS/400 product. It relates to AS/400 systems running Version 3 Release 2 or Version 3 Release 7, and subsequent version and release levels, as needed. Since this document will be updated on a regular basis, it is suggested that you refer to it on a regular basis. For an index of related documents, please refer to document: 
II10405 - AS/400: Network Station Reference .
Information About Bootp and the IBM Network Station Boot Configuration Options
The IBM Network Station has two configuration options for communicating to the AS/400 system:
When using the Bootp configuration, the host server holds a Bootp table built to define the IBM Network Station using its hardware MAC address and assigns it an Internet Protocol (IP) address. It also tells what files to use to download code and programs to the IBM Network Station. To use this configuration, you must setup the Bootp table on the AS/400 system to define the IBM Network Stations and then simply power on your IBM Network Stations (once the mouse, keyboard, power, and LAN cables are connected).
When using the NVRAM configuration, you need to manually configure each IBM Network Station in order to assign IP addresses (its own unique address as well as the host server IP address, gateway address, and subnet mask address).
The Bootp client protocol is used by diskless terminals or systems to request service from a server to obtain programs or an operating system to perform work. It does not have its own operating system, so consequently it is referred to as a dumb terminal or non-programmable station. This is different from present Personal Computers (PCs) that have a disk to boot up its operating system and be able to work independently.
An obstacle occurs, because of TCP/IP restrictions, with Bootp because it has to broadcast all 1's (referred to as limited broadcast) on the TCP/IP network when it initiates connection with an AS/400 host in order to obtain programs or an operating system to be able to perform some work. After the IBM Network Station powers on and does its power on self-test, it will connect to the TCP/IP network by sending its own hardware MAC address and an IP limited broadcast of all 1's requesting service from any system that recognizes this MAC address. Normally, a broadcast of 1's, which is an IP address of 255.255.255.255, is not allowed to cross routers to other LAN segments because it could create network congestion when you have many dumb terminal devices requesting to connect at one time.
To get around this problem, customers have a few options. One is to have intelligent routers enabled to route Bootp broadcasts across the network. Another option is to install a device on the same segment as the Network Station to act as a Bootp Relay Agent. Presently, a UNIX system or RS/6000 has the necessary code and can be configured to receive limited broadcasts then forward them on to the appropriate AS/400 host server. Yet another option is that the AS/400 server could be located on the same LAN segment as the IBM Network Stations.
References:
On-Line Help Text
PTF fixes applied to Network Station common code products (boot prom, Java, 5250 session, and so on) and the Network Station Manager code, may contain enhancements to these products. Documentation of these enhancements will be placed in the physical publications (user manuals) at the next revision.
Prior to the revisions of the physical documentation, instructions on the use of new features and enhancements can be found in the On-Line Help text. The On-Line Help text is obtained from the PTF fixes. To access the On-Line Help text from the Network Station, click on one of the Help buttons. A Help button is found within each application (window); the On-Line Help text is context-sensitive.
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Document Category |
Boot Prom, General Information, Installation Guides, System Administration Tools, User Guides | |
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Date Created |
12-05-99 | |
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Last Updated |
12-05-99 | |
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Revision Date |
12-11-99 | |
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Brand |
IBM Network Station, Network Computers | |
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Product Family |
Network Station, AS/400 - Network Station, NT Server - Network Station, OS/2 Warp Server - Network Station, RS/6000 - Network Station, S/390 OS/390 - Network Station, S/390 VM/ESA - Network Station | |
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Machine Type |
8361, 8362 | |
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Model |
All | |
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