Introducing the Terminal Server 720
1.3
Product Prerequisites
The Terminal Server 720 processor module and associated I/O modules can be ordered as part
of a Network 9000 chassis configuration, or can be added separately to an installed Network
9000 unit. Each Terminal Server 720 processor module requires one Network 9000 chassis
processor module slot. Each associated I/O module requires one Network 9000 chassis I/O
module slot.
The server requires Xyplex TCP/IP-LAT software, Release 4.3 or greater. The unit is
configured at the factory to load its software from a memory card, if one is inserted in the card
slot. If a card is not present, the unit requests software from a network load server, which can be:
• Another Terminal Server 720 or other Network 9000 product that is equipped with a
memory card which contains the correct load image.
• A VAX/VMS system, from which the unit can load via DEC Maintenance Operations
Protocol (MOP)
• A UNIX system running:
- Bootstrap protocol (BOOTP) and Trivial File Transfer Protocol (TFTP), or:
- Reverse Address Resolution Protocol (RARP) and TFTP, or
- Trivial File Transfer Protocol (for "Directed" TFTP)
• Other Xyplex loader units, such as a MAXman unit.
The load server sends a software image to the server, over the network, whenever the unit is
powered on or re-initialized. By default, the terminal server requests software from each type
of load server, until a load server responds with a load offer. (Appendix C includes a flow chart
showing the order in which the unit uses protocols to load. Appendix D provides a description of
the software loading process.) You can have multiple load servers on the network.
1.3.1
Changing the Software Loading Method
You can specify the protocols which the server uses to load software and which protocols will be
used. For example, you can configure the unit to load exclusively from a specific type of load
server, to use a specific protocol first and another next, or you can configure the unit to load
from the memory card only. You use the initialization configuration menu (refer to Appendix
C) to change the software loading method. Alternatively, you can use DEFINE CHASSIS
commands to change the software loading method (refer to the Guide to Managing Network
9000 Devices and Power Supplies for more information).
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