Cisco 640-802

Description:	cisco
Category:	Computers
Created by:	alex185 on 2009-10-11

Question	Answer
Router>	User mode
Router#	Privileged mode
Router(config)#	Global configuration mode
Router(config-if)#	Interface mode
Router(config-subif)#	Subinterface mode
Router(config-line)#	Line mode
Router(config-router)#	Router configuration mode
Router>	Can see config, but not change
Router#	Can see config and move to make changes
Router#config t Router(config)#	Moves to global config mode This prompt indicates that you can start making changes
Router(config)#hostname Cisco Cisco(config)#	Name can be any word you choose
Router(config)#enable password cisco	Sets enable password
Router(config)#enable secret class	Sets enable secret password
Router(config)#line con 0 Router(config-line)#password console Router(config-line)#login	Enters console-line mode Sets console-line mode password to console Enables password checking at login
Router(config)#line vty 0 4 Router(config-line)#password telnet Router(config-line)#login	Enters vty line mode for all 5 vty lines Sets vty password to telnet Enables password checking at login
Router(config)#line aux 0 Router(config-line)#password backdoor Enables password checking at login	Enters auxiliary line mode Sets auxiliary line mode password to backdoor Enables password checking at login
Router(config)#service passwordencryption	Applies a weak encryption to passwords
Router(config)#enable password cisco	Sets enable password to cisco
Router(config)#line con 0	0
Router(config-line)#password Cisco	Continue setting passwords as above
Router(config)#no service passwordencryption	Turns off password encryption
Router#show ?	Lists all show commands available
Router#show interfaces	Displays statistics for all interfaces
Router#show interface serial 0	Displays statistics for a specific interface, in this case Serial 0
Displays statistics for a specific interface, in this case Serial 0	Displays a summary of all interfaces, including status and IP address assigned
Router#show controllers serial 0	Displays statistics for interface hardware. Statistics display if the clock rate is set and if the cable is DCE, DTE, or not attached
Router#show clock	Displays time set on device
Router#show hosts	Displays local host-to-IP address cache. These are the names and addresses of hosts on the network to which you can connect
Router#show users	Displays all users connected to device
Router#show history	Displays history of commands used
Router#show flash	Displays info about Flash memory
Router#show version	Displays info about loaded software version
Router#show arp	Displays the ARP table
Router#show protocols	Displays status of configured Layer 3 protocols
Router#show startup-config	Displays configuration saved in NVRAM
Router#show running-config	Displays configuration currently running in RAM
Router(config)#int s0 Router(config)#int s0	Moves to interface S0 mode
Router(config-if)#exit Router(config-if)#int e0	In int S0, move to E0
Router(config)#int e0	Prompt does not change; be careful
Router(config)#int s0/0	Moves to interface Serial 0/0 mode
Router(config-if)#description Link to ISP	Optional descriptor of the link is locally significant
Router(config-if)#ip address 192.168.10.1 255.255.255.0	Assigns address and subnet mask to interface
Router(config-if)#clock rate 56000	Assigns a clock rate for the interface
Router(config-if)#no shut	Turns interface on
Router(config)#int fa0/0	Moves to Fast Ethernet 0/0 interface mode
Router(config-if)#description Accounting LAN	Optional descriptor of the link is locally significant
Router(config-if)#ip address 192.168.20.1 255.255.255.0	Assigns address and subnet mask to interface
Router(config-if)#no shut	Turns interface on
Router(config)#banner motd # This is a secure system. Authorized Personnel Only! # Router(config)#	# is known as a delimiting character. The delimiting character must surround the banner message and can be any character so long as it is not a character used within the body of the message
Router(config)#clock timezone EST –5	Sets the time zone for display purposes. Based on coordinated universal time (Eastern Standard Time is 5 hours behind UTC)
Router(config)#ip host london 172.16.1.3	Assigns a host name to the IP address. After this assignment, you can use the host name instead of an IP address when trying to Telnet or ping to that address
Router#ping london = Router#ping 172.16.1.3	TIP: The default port number in the ip host command is 23, or Telnet. If you want to Telnet to a device, just enter the IP host name itself: Router#london = Router#telnet london = Router#telnet 172.16.1.3
Router(config)#no ip domain-lookup Router(config)#	Turns off trying to automatically resolve an unrecognized command to a local host name
Router(config)#line con 0 Router(config-line)#logging synchronous	Turns on synchronous logging. Information items sent to console will not interrupt the command you are typing. The command will be moved to a new line
Router(config)#line con 0 Router(config-line)#exec-timeout 0 0 Router(config-line)#	Sets time limit when console automatically logs off. Set to 0 0 (minutes seconds) means console never logs off
Router#copy run start	Saves the running-config to local NVRAM
Router#copy run tftp	Saves the running-config remotely to TFTP server
Router#erase start	Deletes the startup-config file from NVRAM
Router>en	Enters privileged mode
Router#clock set 18:30:00 15 Nov 2004	Sets local time on router
Router#config t	Enters global config mode
Router(config)#hostname Boston	Sets router name to Boston
Boston(config)#no ip domain-lookup	Turns off name resolution on unrecog-nized commands (spelling mistakes)
Boston(config)#banner motd # This is the Boston Router. Authorized Access Only #	Creates an MOTD banner
Boston(config)#clock timezone EST –5	Sets time zone to Eastern Standard Time (–5 from UTC)
Boston(config)#enable secret cisco	Enable secret password set to cisco
Boston(config)#service password-encryption	Passwords will be given weak encryption
Boston(config)#line con 0	Enters line console mode
Boston(config-line)#logging sync	Commands will not be interrupted by unsolicited messages
Boston(config-line)#password class	Sets password to class
Boston(config-line)#login	Enables password checking at login
Boston(config-line)#line vty 0 4	Moves to virtual Telnet lines 0 through 4
Boston(config-line)#password class	Sets password to class
Boston(config-line)#login	Enables password checking at login
Boston(config-line)#line aux 0	Moves to line auxiliary mode
Boston(config-line)#password class	Sets password to class
Boston(config-line)#login	Enables password checking at login
Boston(config-line)#exit	Moves back to global config mode
Boston(config)#no service passwordencryption	Turns off password encryption
Boston(config)#int fa 0/0	Moves to Fast Ethernet 0/0 mode
Boston(config-if)#desc Engineering LAN	Sets locally significant description of the interface
Boston(config-if)#ip address 172.16.10.1 255.255.255.0	Assigns IP address and subnet mask to the interface
Boston(config-if)#no shut	Turns on the interface
Boston(config-if)#int s0/0	Moves directly to Serial 0/0 mode
Boston(config-if)#desc Link to Buffalo Router	Sets locally significant description of the interface
Boston(config-if)#ip address 172.16.20.1 255.255.255.0	Assigns IP address and subnet mask to the interface
Boston(config-if)#clock rate 56000	Sets a clock rate for serial transmission (DCE cable must be plugged into this interface)
Boston(config-if)#no shut	Turns on the interface
Boston(config-if)#exit	Moves back to global config mode
Boston(config)#ip host buffalo 172.16.20.2	Sets a local host name resolution to IP address 172.16.20.2
Boston(config)#exit	Moves back to privileged mode
Boston#copy run start	Saves running-config to NVRAM