Bay Networks 8000 RAC, Installing Manual, Page: 63 / 148

2-19
Chapter 2 Installing the Model 8000 Remote Access Concentrator
Installing the Model 8000 Remote Access Concentrator
Booting the Remote Access Concentrator
You can boot the RAC by downloading the image from a host system or
another Model 8000 Remote Access Concentrator, or by using the image
contained in flash memory (self-boot). However, before you actually boot
the RAC, you must first initialize the IP address parameters manually or
by using the autoinitialize feature. The following sections describes the
two methods of initializing the IP address parameters, and the various
boot methods.
Autoinitializing the IP Address Parameters
The RAC is distributed without an IP address or preferred load host
defined in ROM. When you boot RAC, it attempts to initialize itself
(autoinitialize) using BootP (Bootstrap Protocol) and RARP (Reverse
Address Resolution Protocol).
This method of initializing the IP address parameters is
generally done when booting from a host system (not when
self-booting).
The RAC supports the BootP and RARP protocols. These protocols
obtain boot information from a UNIX host without requiring any manual
setup on the RAC.
• BootP allows a diskless client to determine its IP address,
the IP address of the server, and the name of the file to be
loaded into memory.
• RARP maps a hardware address into an IP address.
The ROM invokes this system of acquiring boot information when a boot
is initiated and the RAC is not initialized. Under this condition, the RAC
first tries to get boot information via BootP or RARP.