SmartSwitch Router User Reference Manual 25Chapter 1: SmartSwitch Router Product OverviewTo exit Configure mode and return to Enable mode, use one of the following commands:Boot PROM ModeIf your SSR does not find a valid system image on the external PCMCIA flash, the systemmight enter programmable read-only memory (PROM) mode. You should then reboot theSSR at the boot PROM to restart the system. If the system fails to reboot successfully,please call Cabletron Systems Technical Support to resolve the problem.To reboot the SSR from the ROM monitor mode, enter the following command.Disabling a Function or FeatureThe CLI provides for an implicit negate. This allows for the “disabling” of a feature orfunction which has been “enabled”. Use the negate command on a specific line of theactive configuration to “disable” a feature or function which has been enabled. Forexample, Spanning Tree Protocol is disabled by default. If after enabling Spanning TreeProtocol on the SmartSwitch Router, you want to disable STP, you must specify the negatecommand on the line of the active configuration containing the stp enable command.Loading System Images and Configuration FilesThe SSR contains an internal flash on the Control Module and an external PC flash. Theinternal flash contains the SSR boot image and user defined configuration files. Anexternal PC flash contains the system image executed by the Control module. When antacacs - Configure TACACS related parametersvlan - Configure VLAN-related parametersSpecial configuration mode commands:erase - Erase configuration informationnegate - Negate a command or a group of commandsusing line numbersno - Negate matching commandssave - Save configuration informationsearch - Look up a command in configurationshow - Show configuration commandsExit Configure mode. exitCtrl+ZReboot in Boot PROM mode. reboot