Technical data

System Administration

303561-A Rev 00

8-35

When the system boots, it automatically loads the default router software image

(unless you specify another router software image) from another slot into memory

on the processor module or, if another slot is unavailable, from the file system to

memory. To upgrade with a new image, transfer the image to the file system and

reset the system; do not use the

prom -w command when upgrading with a new

router software image.

The sections that follow describe how to use the

readexe, prom -w, and prom -v

commands to validate, upgrade, and verify executable software.

Validating an Executable File

You validate executable files before upgrading by using the readexe command.

This command calculates file header and image checksums on executable files on

the file system, verifies that the checksums match those within the files, and

displays the results and all file header information.

Enter the following command and parameter to validate an executable file on the

active volume, where

is the name of the executable file:

readexe

Enter the following command and parameters to validate an executable file on

another volume:

readexe

<vol>

<vol>

is the volume storing the file.

is the name of the executable file.

Figure 8-3

shows a sample system response to the readexe command.

Note:

You cannot edit executable files.