Before You Reinstall JUNOS Software

Purpose

Before you reinstall the JUNOS software, it is important to log information about the existing system so that after the reinstall you can verify that all software components are installed and working as expected. Also, while logging information, you might find an existing problem that you did not know about and might have thought was caused by the reinstall.

Steps To Take

To log important information about your system, follow these steps:

1. Log the Software Version Information
2. Log the Hardware Version Information
3. Log the Chassis Environment Information
4. Log the System Boot-Message Information
5. Log the Active Configuration
6. Log the Interfaces on the Router
7. Log the BGP, IS-IS, and OSPF Adjacency Information
8. Log the System Storage Information
9. Back Up the Currently Running and Active File System
10. Have the Boot Floppy or PCMCIA Card Ready

In all of the logging steps, you can use your terminal program to save the output from the commands, or use the save command to redirect the output to an external file.

To save the output to a file on another machine, use the following JUNOS command-line interface (CLI) operational mode command:

user@host> command | save filename 

By default, the file is placed in your home directory on the router. To redirect the output to a file on another machine, change the filename to include the path to that machine and file. For information about how you can specify the filename, see the JUNOS System Basics and Services Command Reference.

The following example stores the output of the show version command in a file:

user@host> show version | save filename 

Wrote 1143 lines of output to 'filename'