CCNA ICND2 Cisco learning network lab all commands – Flashcards
115 test answers
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exec time-out
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Sets the inactivity time that is allowed before a session will be automatically logged out.
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history size
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Sets the number of lines that are held in the history buffer for recall. Two separate buffers are used: one for EXEC mode commands and the other for configuration mode commands.
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[no] ip domain-lookup
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By default, the command-line interpreter tries, when receiving a command it does not recognize, to interpret it as a symbolic name for an IP address. The no form of this command turns off this default action, thus speeding up the interpretation of erroneous entries.
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line console 0
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Enters line console 0 configuration mode.
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line vty 0 4
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Enters vty configuration mode. Vty lines allow access to the switch for remote network management. The number of vty lines available is dependent on the Cisco IOS Software version that is being used. Typical values are 0-4 and 0-15 (inclusive). Virtual Cisco IOS Software on UNIX devices has vty line values of 0 to 4.
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logging synchronous
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Synchronizes unsolicited messages and debugs privileged EXEC command output with solicited device output and prompts for a specific console port line or vty line. (prevents interuptions while typing)
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show clock
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Displays the system clock.
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show history
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Displays recently entered commands.
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show interfaces
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Displays information regarding all of the router interfaces.
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show running-config
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Displays the active configuration.
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show terminal
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Displays the current settings for the terminal.
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show version
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Displays the configuration of the router hardware and the various software versions.
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terminal history size
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Sets the command history buffer size.
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banner motd
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Allows the conf iguration of a message, which will be display ed at the time of the login process.
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clear mac-address-table dynamic interface int-id
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Clears the secure MAC addresses that are associated with the specified interface. The access parameter ensures that trunk ports are not affected.
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configure terminal (conf t)
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Activates the configuration mode from the terminal.
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copy running-config destination
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Copies the switch running configuration file to another destination. A typical destination is the startup configuration.
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copy running-config startup-config
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Copies the switch running configuration file to the startup configuration file that is held in local NVRAM.
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crypto key generate rsa
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Generates the RSA key pairs to be used.
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end
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Terminates the configuration mode.
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interface int-id
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Enters interface configuration mode.
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interface range int-id - last-port-number
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Allows the grouping of interfaces, so that subsequent interface configuration commands will be applied to all the specified interfaces simultaneously.
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IP domain-name name
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Supplies an IP domain name, which is required by the cryptographic key generation process.
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IP SSH version [1 | 2]
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Specifies the version of SSH to be run. To disable the version of SSH that was configured and to return to compatibility mode, use the no form of this command.
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line VTY 0 15
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Enters the VTY configuration mode. VTY lines allow access to the switch for remote network management. The number of VTY lines that are available is dependent on the Cisco IOS Software version. Typical values are 0-4 and 0-15 (inclusive).
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login
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Activates the login process on the console or VTY lines.
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login local
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Makes the login process on the console or vty lines rely on (or use) the local authentication database.
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logout
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Exits EXEC mode, and requires reauthentication (if enabled).
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password
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Assigns a password to the console or VTY lines.
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ping IP-address
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Used to troubleshoot the accessibility of devices. This tool uses ICMP path echo requests and ICMP path echo replies to determine whether a remote host is active. The ping command also measures the amount of time it takes to receive the echo reply.
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reload
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Restarts the switch and reloads the Cisco IOS operating system.
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service password-encryption
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Enables the service, which will encrypt all passwords in the running configuration.
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show IP ARP
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Displays the IP address resolution table, which holds the binding between IP addresses and their respective MAC addresses.
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show IP SSH
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Shows the current settings of the SSH protocol.
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show mac-address-table dynamic
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Displays only the dynamically learned MAC addresses in the table.
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show mac-address-table interface int-id
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Displays only the MAC addresses in the table that are associated with the specified interface.
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show port-security interface int-id
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Displays administrative and operational status of secure ports on a switch. Optionally displays specific interface security settings or all secure MAC addresses.
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show running-config
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Displays the active configuration.
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show running-config interface int-id
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Displays the running configuration of the interface that is specified in the command.
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shutdown no shutdown
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Disables and enables an interface.
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switchport mode access
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Sets the port to access mode. Use the no version of this command to reset default values.
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switchport port-security
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Enables port security on an interface. Entered without keywords.
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switchport port-security mac-address sticky
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Sets the secure MAC addresses that are associated with an interface to be learned dynamically.
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switchport port-security maximum [number]
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Sets the maximum number of secure MAC addresses for the interface. Use the no version of this command to remove it.
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switchport port-security violation violation mode
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Sets the action to be taken when a security violation occurs. Protect, restrict, and shutdown are the three valid modes.
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transport input telnet ssh
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Specifies which protocols to use to connect to a specific line of the switch.
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username username password password
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Creates a username and password pair, which can then be used as a local authentication database.
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interface type number
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To configure an interface type and enter interface configuration mode, use the interface command in global configuration mode.
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copy running-config startup-config
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Copies the switch running configuration file to the startup configuration file that is held in local NVRAM.
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ping system-address
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Diagnoses basic network connectivity in IP networks. Use the ping command in user EXEC or privileged EXEC mode.
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ipv6 unicast-routing
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Enables the forwarding of IPv6 unicast datagrams. Use the ipv6 unicast-routing command in global configuration mode.
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ipv6 address ipv6-address/prefix-length
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Configure an IPv6 address based on an IPv6 general prefix and enables IPv6 processing on an interface. Use the ipv6 address command in interface configuration mode.
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ipv6 address ipv6-prefix/prefix-length eui-64
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Configures an IPv6 address for an interface and enables IPv6 processing on the interface using an EUI-64 interface ID in the low order 64 bits of the address. Use the ipv6 address eui-64 command in interface configuration mode.
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ipv6 address autoconfig
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Enables automatic configuration of IPv6 addresses using stateless autoconfiguration on an interface and enables IPv6 processing on the interface. Use the ipv6 address autoconfig command in interface configuration mode.
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ipv6 address ipv6-address/prefix-length link-local
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Configures an IPv6 link-local address for an interface and enables IPv6 processing on the interface. Use the ipv6 address link-local command in interface configuration mode.
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ipv6 nd prefix ipv6-prefix/prefix-length
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Configures which IPv6 prefixes are included in IPv6 Neighbor Discovery (ND) router advertisements. Use the ipv6 nd prefix command in interface configuration mode.
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show ipv6 interface type number]
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Displays the usability status of interfaces configured for IPv6. Use the show ipv6 interface command in user EXEC or privileged EXEC mode.
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vlan vlan-id
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Configures a specific VLAN. Use the vlan command in VLAN configuration mode.
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name vlan-name
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Defines a text string used as the name of the VLAN (1 to 32 characters)
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switchport access vlan vlan-id
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Configures the interface as a static access port with the VLAN ID of the access mode VLAN. The range is 1 to 4094.
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switchport mode access
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Sets the port to static access mode. The port is set to access unconditionally and operates as a nontrunking, single VLAN interface that sends and receives unencapsulated (nontagged) frames. An access port can be assigned to only one VLAN.
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show vlan brief
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Displays only a single line for each VLAN, naming the VLAN, status, and ports.
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switchport trunk encapsulation dot1q
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Sets the trunk encapsulation format to 802.1Q.
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switchport mode trunk
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Specifies a trunking VLAN Layer 2 interface.
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ping system-address
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Diagnoses basic network connectivity in IP networks. Use the ping command in user EXEC or privileged EXEC mode.
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encapsulation dot1q vlan-id
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Enables IEEE 802.1Q encapsulation of traffic on a specified router subinterface in a VLAN; Use the encapsulation dot1q command in interface range configuration mode or subinterface configuration mode.
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router ospf process-id
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Configures an OSPF routing process. Use the router ospf command in global configuration mode.
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router-id ip-address
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To use a fixed router ID, use the router-id command in router configuration mode.
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network ip-address wildcard-mask area area-id
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Defines the interfaces on which OSPF runs and to define the area ID for those interfaces; Use the network area command in router configuration mode.
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show ip ospf neighbor
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Displays OSPF neighbor information on a per-interface basis. Use the show ip ospf neighbor command in EXEC mode.
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ip ospf process-id area area-id
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Enables OSPFv2 on an interface. Use the ip ospf area command in interface configuration mode.
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show ip ospf interface brief
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Displays brief overview information for OSPF interfaces, states, addresses and masks, and areas on the router.
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default-information originate
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Generates a default external route into an OSPF routing domain. Use the default-information originate command in router configuration or router address family topology configuration mode.
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Ipv6 router ospf process-id
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Configures an OSPFv3 routing process; Use the ipv6 router ospf command in global configuration mode
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router-id ip-address
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To use a fixed router ID, use the router-id command in router configuration mode.
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show ipv6 ospf neighbor
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Displays OSPFv3 neighbor information on a per-interface basis. Use the show ipv6 ospf neighbor command in EXEC mode.
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Ipv6 ospf process-id area area-id
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Enables OSPFv3 on an interface. Use the ipv6 ospf area command in interface configuration mode.
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show ipv6 ospf interface brief
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Displays brief overview information for OSPFv3 interfaces, states, addresses and masks, and areas on the router.
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default-information originate
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Generates a default external route into an OSPFv3 routing domain. Use the default-information originate command in router configuration or router address family topology configuration mode.
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ipv6 unicast-routing
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Enables the forwarding of IPv6 unicast datagrams. Use the ipv6 unicast-routing command in global configuration mode.
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name vlan-name
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Defines a VLAN name from config-vlan subconfiguration mode.
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ping
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Executes an extended ping command. You will set the ping count and other options manually. (Use this command in privileged EXEC mode.)
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ping ip-address
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Common tool that is used to troubleshoot the accessibility of devices. It uses ICMP echo requests and ICMP echo replies to determine whether a remote host is active. The ping command also measures the amount of time it takes to receive the echo reply.
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show interfaces interface
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Displays the trunk parameters.
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show interfaces interface switchport
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Displays VLAN and trunk information.
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show spanning-tree vlan vlan#
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Displays spanning-tree information for a particular VLAN.
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show vlan
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Displays information on all configured VLANs.
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show vtp status
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Displays the VTP status.
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spanning-tree mode rapid-pvst
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Global configuration mode to enable the Rapid-PVST protocol.
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spanning-tree portfast
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Enables PortFast on an interface.
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spanning-tree vlan vlan- ID root primary
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Global configuration mode to designate a switch to be the primary root for a particular VLAN.
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spanning-tree vlan vlan- ID root secondary
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Global configuration mode to designate a switch to be the secondary root for a particular VLAN.
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switchport access vlan vlan#
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Interface configuration mode to assign a port to a VLAN.
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switchport mode trunk
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Interface configuration mode to set a Fast Ethernet or Gigabit Ethernet port to trunk mode.
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vlan vlan-id
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Global configuration mode to add a VLAN and enter config- vlan subconfiguration mode. Use the no form of this command to delete the VLAN.
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vtp domain domain
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Sets the VTP administrative domain.
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vtp mode {server | client | transparent}
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Sets the VTP mode; use the no form of this command to return to the default setting.
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ping 10.1.1.1
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Tests Layer 3 connectivity
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show interface
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Displays interface status and statistics
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show interface switchport
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Displays switching-related interface statistics
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show interface trunk
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Displays interfaces configured to be trunk ports
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show vlan id vlan-number
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Displays VLAN status and statistics
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show interface trunk
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Displays interfaces configured to be trunk ports
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show vlan id vlan-number
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Displays VLAN status and statistics
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debug ip ospf adj
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Displays the OSPF neighbor establishment process
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debug ip ospf hello
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Displays the OSPF hello packets exchange
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show interfaces type
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Displays statistics for interfaces configured on the router
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show ip ospf interface
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Displays statistics for interfaces that have OSPF enabled
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show ip ospf neighbor
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Determines the state of an OSPF neighbor
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show ip protocols
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Displays values about routing protocols and routing protocol timer information associated with the router
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show ip route
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Displays the routing table
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