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Introduction to Cisco Routers Convertir en PDF Version imprimable Suggérer par mail
Écrit par CCNA   
26-05-2008
  • Internal components of routers
    • IOS : Internetwork Operating System
    • ROM : bootstrap code (set of instructions to load IOS)
    • FLASH : IOS image loaded at start up
    • NVRAM : start up configuration files
    • RAM : currently running configuration
    • Start up process : ROM loads IOS to FLASH + NVRAM loads RAM

  • External components of routers
    • Serial ports (WAN) --> routers to routers
    • Console ports (access) --> management PC to router
    • Ethernet ports (LAN) --> router to switches or PCs
    • Auxiliary ports (modem connectivity) --> router to modem
    • Power ports (electrical power) --> router to electrical socket

  • DCE/DTE
    • Data Communication Equipment (ie modem) --> clockrate (bandwidth in kbps) has to be configured
    • Data Terminal Equipment --> no clockrate
    • When 2 routers are linked together, one must be DCE and the other one must be DTE

  • 3 modes
    • User mode (= console mode) : basic mode to log in to the route
    • Privilege mode (= enable mode) : mode to check the configuration and write to NVRAM
    • Configuration mode : mode to configure the router and write to RAM
      3 modes
Dernière mise à jour : ( 07-06-2008 )
 
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