Cisco PRP-2 Installation And Configuration Manual page 7

Performance route processor
Table of Contents

Advertisement

PRP-3 ROMMON Changes
The PRP-3 ROMMON in Cisco IOS XR Software Release 3.8.0 has significant changes and more
software intelligence than the PRP-2 ROMMON of previous releases. The following sections discuss in
detail the changes introduced in PRP-3 ROMMON.
Capability of ROM Monitor to Netboot
ROMMON is the initial program that loads in Cisco IOS XR software. It loads the mini.vm file into the
RAM, sets up some initial hardware needed, and then hands over control to the CPU. The CPU thereafter
takes on and loads the Cisco IOS XR software to enable the router to come up. The ROMMON in PRP-3
is now more intelligent than the ROMMON in PRP-1 or PRP-2. The ROMMON of PRP-1 and PRP-2
needed a boothelper image to reach TFTP and download the Cisco IOS XR software image. The
boothelper image is stored in bootflash. The PRP-3 ROMMON has more software intelligence, because
it can reach the TFTP server without a boothelper image. PRP-3 ROMMON does not require a
boothelper image to reach the TFTP server. Hence, bootflash memory is also removed from PRP-3.
FAT32 File System Support
PRP-3 ROMMON supports only the FAT32 file system (FS), it does not support FAT12 or FAT16 file
system. PRP-3 ROMMON does the native TFTP netboot and file download over the management ports.
ROMMON Logical Divisions
The PRP-3 ROMMON is split into following three software divisions:
ROMMON Procedure to Boot an Image from TFTP
The following section discusses booting a Cisco IOS XR software image from TFTP using ROMMON.
Certain changes are related to booting from ROMMON.
Before starting to boot an image from TFTP using ROMMON, ROMMON must be initialized. The
output displayed when ROMMON is initialized is displayed below. The output in blue shows the
hardware changes in Cisco IOS XR Software Release 3.8.0.
Cisco PRP-3 BSL, Version 1.0.0 (bld1) DEVELOPMENT SOFTWARE
Compiled on 04/07/08 at 15:19:11 PDT [BLD-rommon]
Copyright (c) 1994-2008 by cisco Systems, Inc.
OL-17436-01
Capability of ROM Monitor to Netboot
FAT32 File System Support
ROMMON Logical Divisions
Boot Strap Loader (BSL)—BSL thin bootstrap starts one of the two ROMMON images (latest or
golden ROMMON images).
Latest ROMMON image—It is the Primary ROMMON image, which sets up the initial hardware.
Golden ROMMON image—It serves as a backup ROMMON image, which is used only if the latest
ROMMON image fails to load from upgrade, corruption, or any other issues.
--- Output details when ROMMON is initialized ---
Product Overview
7

Hide quick links:

Advertisement

Table of Contents
loading

This manual is also suitable for:

Prp-3

Table of Contents