Installation guide

2-21Remote Annex 2000 Hardware Installation Guide
Chapter 2 Installing the Remote Annex 2000
Auto-initializing the ROMs
The Remote Annex 2000 is distributed without an IP address or
preferred load host (UNIX/IP, IPX, or MOP) defined in ROM. When
the device is booted, the Remote Annex 2000 attempts to auto-
initialize its ROMs using BOOTP (bootstrap protocol) and RARP
(Reverse Address Resolution Protocol).
The Remote Annex 2000 supports the BOOTP and RARP protocols.
Use these protocols to automatically obtain boot information from a
UNIX host without requiring any manual set-up on the Remote
Annex 2000.
❑ BOOTP allows a diskless client to determine its Internet
address, the Internet address of the server, and the name of
the file to be loaded into memory.
❑ RARP maps a hardware address into an Internet address.
The ROMs invoke this system of acquiring boot information when a
boot is initiated and the Remote Annex 2000’s Internet address is not
initialized. Under this condition, the Remote Annex 2000 first tries to
get boot information via BOOTP or RARP.
If BOOTP and RARP fail, the Remote Annex 2000 attempts to load an
image by transmitting an IPX advertisement request for service and
a MOP multicast boot request.
If all requests fail, the Remote Annex 2000 will return to the ROM
monitor (if in Test mode) or continue the auto-initializing procedure
indefinately (if in normal mode).