Cisco IOS Wide-Area Networking Configuration Guide - Free Books

Using the CLIUsing the Command-Line Interface in Cisco IOS and Cisco IOS XE SoftwareTable 1CLI Command Modes (continued)CommandModeROM monitorDiagnostic(available onlyon the CiscoASR1000series router)Access Method Prompt Exit Method Mode UsageFrom privileged EXECmode, issue the reloadcommand. Press theBreak key during thefirst 60 seconds whilethe system is booting.The router boots orenters diagnostic modein the followingscenarios. When aCisco IOS process orprocesses fail, in mostscenarios the router willreload.• A user-configuredaccess policy wasconfigured usingthe transport-mapcommand, whichdirected the userinto diagnosticmode.• The router wasaccessed using anRP auxiliary port.• A break signal(Ctrl-C,Ctrl-Shift-6, or thesend breakcommand) wasentered, and therouter wasconfigured to enterdiagnostic modewhen the breaksignal was received.rommon # >The # symbolrepresents the linenumber and incrementsat each prompt.Router(diag)#Issue the continuecommand.If a Cisco IOS processfailure is the reason forentering diagnosticmode, the failure mustbe resolved and therouter must be rebootedto exit diagnostic mode.If the router is indiagnostic modebecause of atransport-mapconfiguration, accessthe router throughanother port or using amethod that isconfigured to connect tothe Cisco IOS CLI.If the RP auxiliary portwas used to access therouter, use another portfor access. Accessingthe router through theauxiliary port is notuseful for customerpurposes.• Run as the defaultoperating mode when avalid image cannot beloaded.• Access the fall-backprocedure for loading animage when the devicelacks a valid image andcannot be booted.• Perform passwordrecovery when aCTRL-Break sequence isissued within 60 secondsof a power-on or reloadevent.• Inspect various states onthe router, including theCisco IOS state.• Replace or roll back theconfiguration.• Provide methods ofrestarting the Cisco IOSsoftware or otherprocesses.• Reboot hardware, suchas the entire router, anRP, an ESP, a SIP, a SPA,or possibly otherhardware components.• Transfer files into or offof the router usingremote access methodssuch as FTP, TFTP, andSCP.iv