Chapter 1: SmartSwitch Router Product Overview26 SmartSwitch Router User Reference ManualSSR boots, the boot image is executed first, followed by the system image and finishingwith a configuration file.Boot and System ImageOnly one boot image exists on the internal flash of the SSR Control Module. Multiplesystem images can be stored on the external PC flash.Configuration FilesThe SSR uses three special configuration files:• Active – The commands from the Startup configuration file and any configurationcommands that you have made active from the scratchpad (see below).Caution: The active configuration remains in effect only during the current power cycle. Ifyou power down or reboot the SSR without saving the active configuration changes to theStartup configuration file, the changes are lost.• Startup – The configuration file that the SSR uses to configure itself when the systemis powered on.• Scratchpad – The configuration commands you have entered during a managementsession. These commands do not become active until you explicitly activate them.Because some commands depend on other commands for successful execution, theSSR scratchpad simplifies system configuration by allowing you to enter configurationcommands in any order, even when dependencies exist. When you activate thecommands in the scratchpad, the SSR sorts out the dependencies and executes thecommand in the proper sequence.Loading System Image SoftwareBy default, the SSR boots using the system image software installed on the ControlModule’s PCMCIA flash card. To upgrade the system software and boot using theupgraded image, use the following procedure.1. Display the current boot settings by entering the system show version command:Here is an example:ctron-ssr-1# system show versionSoftware InformationSoftware Version : 1.0Copyright : Copyright (c) 1996-1998 Cabletron Systems, Inc.Image Information : Version 1.0, built on Fri Mar 20 19:28:49 1998Image Boot Location: file:/pc-flash/boot/ssr8/
