Nortel SR1001, Installation Manual, Page: 48 / 82

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CHAPTER 4
Configuration Upgrading Secure Router Software
SR1001 Installation Guide
Version 8.3.5
Upgrading Secure Router Software
The Nortel command line interface (CLI) provides commands that allow you to upgrade the
SR1001 with new software. Every Secure Router is furnished with a software image file
(T1000.Z) and a boot image file (T1000.bin). Using the TFTP protocol, the latest versions of
these files can be loaded onto a Nortel router from any accessible TFTP server.
A software upgrade consists of two files: T1000.Z and T1000.bin. The .Z file is the operating
Secure Router for the Secure Router; the .bin file contains the downloadable boot images.
NOTE:
Secure Routers do not support two simultaneous downloads.
NOTE: Refer to the appropriate Command Reference Guide (domestic or international products) for
specific command parameters, options, and context.
Before Downloading the T1000.Z File
If you must issue the file/ download command, do so only when the source of the download
file is currently answering a ping command and there is no immediate concern about
unscheduled power outages. This situation is a cause for concern because a problem can arise
when there is insufficient Flash space to hold a backup copy of the downloaded T1000.Z file.
When this occurs, the Secure Router prompts for approval to continue. However, if power fails
or there are network problems during the file download, the Secure Router may not be able to
boot from flash because the file may be incomplete or corrupt. If this occurs, you can boot
using TFTP. Refer to Booting From a Network TFTP Server on page 38 for this procedure.