Cabletron Systems CSMIM-T1 - Manual (Page 37)

Auto-initializing the ROMs
CSMIM-T1 Hardware Installation Guide 2-11
2.7 AUTO-INITIALIZING THE ROMS
The CSMIM-T1 is distributed without an IP address or preferred load
host (UNIX/IP or MOP) defined in ROM. When the device is booted, the
CSMIM-T1 attempts to auto-initialize its ROMs using BOOTP (bootstrap
protocol) and RARP (Reverse Address Resolution Protocol).
The CSMIM-T1 supports the BOOTP and RARP protocols. The ROMs
use these protocols to obtain boot information without requiring any
manual set up on the CSMIM-T1.
• BOOTP is a bootstrap protocol that 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 (Reverse Address Resolution Protocol) maps a hardware
address into an Internet address.
The ROM invokes these methods of acquiring boot information when a
boot is initiated and the CSMIM-T1’s Internet Address is not initialized.
Under this condition, the CSMIM-T1 first tries to get boot information via
BOOTP; if BOOTP fails, it tries to get boot information via RARP. If
neither protocol is successful, the CSMIM-T1 attempts to load an image
by transmitting an IPX advertisement request for service and a MOP
multicast boot request. Although it will attempt to load an IPX image, the
module WILL NOT BOOT FROM IPX.
If all requests fail, the CSMIM-T1 will return to the ROM Monitor (if in
test mode) or continue the auto initializing procedure indefinitely (if in
normal mode).