Ccna

Clasified in Notes of Information technology of University.

Written at June 24, 2009 on esEspañol, translated to enEnglish and with a size of 4,692 bytes.

  • Console Password: limited access for devices via the console connection
  • Enable password: restricts access to privileged EXEC mode
  • Enable secret password: encrypted, restricting access privileged EXEC mode
  • VTY Password: limiting access devices using Telnet

  • Switch (config) # line console 0
    Switch (config-line) # password password
    Switch (config-line) #    login

  • Router (config) # line vty 0 4
    Router (config-line) # password password
    Router (config-line) # login

  • Switch (config) # banner motd # message #

  • Router (config) # interface FastEthernet 0 / 0
    Router (config-if) # ip address ip_address netmask
    Router (config-if) # no shutdown

  • ! - Indicates the receipt of an ICMP echo reply
    . - Indicates a time limit when a reply is expected
    U - received an ICMP unreachable

  • Privileged EXEC

    • copy running-config startup-config - Copy the active configuration to NVRAM.
    • copy running-config startup-config - Copy the configuration in NVRAM to RAM.
    • erase startup-configuration - Clear the configuration stored in NVRAM.
    • ping ip_address - Ping to that address.
    • tracerouteip_address - Track every jump to that address.
    • show interfaces - Show statistics for all interfaces of a device.
    • show clock - Show the time set in the router.
    • show version - Display the currently loaded IOS version, hardware and device information.
    • show arp - Show ARP table of the device.
    • show startup-config - Display the configuration stored in NVRAM.
    • show running-config - Show the contents of the configuration file currently running.
    • show ip interface - Display IP statistics for the / s interface / ces of a router.
    • configure terminal - Enter terminal configuration mode.

    Terminal configuration mode

    • hostname hostname - Assign a host name to the device.
    • enable password password - Set password to enable unencrypted.
    • enable secret password - Set password to enable securely encrypted.
    • service password-encryption - Encrypt display all passwords, except the secret.
    • banner motd # message # - Set a title with the message of the day.
    • line console 0- Enter the line configuration mode console.
    • line vty 0 4 - Enter Line Configuration mode virtual terminal (Telnet).
    • INTERFACE_NAME interface - Enter interface configuration mode.

    Line configuration mode

    • login - Enable password checking at login.
    • password password - Set password online.

    Interface Configuration Mode

    • ip address ip_address netmask - Set the interface IP address and subnet mask.
    • descriptiondescription - Set the description of the interface.
    • clock rate value - Set the clock frequency for the DCE device.
    • no shutdown - Set the activation of the interface.
    • shutdown - administration to establish the deactivation of the interface.
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Tags:ccna password line vty login line console ip address
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