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Router Commands

Router Commands

A router is device on the internet that determines the next station to which the data packet must be transmitted usually a work station is connected to two other network devices and has to decide the path to which the information must be send. Routers are located at gateways and must be determine the next network devices to shift data to.

To operate the router you need to learn and give specific commands which are used to let router perform specific functions. Due to a multiple functions various commands perform they are categorized on two levels of basic for simple users and experienced for professionals. To keep all the router commands in mind is not an easy task so for less experienced user it is advisable to learn basics and take the help of experienced professionals when it comes to difficult commands. Below you will find the list of commands that are used on daily basis in routine by an individual generally

There are certain keyboard shortcuts that are worth mentioning before learning some of the basic commands

The Necessary Key Board Short Cuts

  • SHIFT+CTRL+6 to insert the break function
  • CTRL+P is used to display the command that a user is using previously
  • CTRL+N is used to display the new or next command in queue

The critical router commands that are used to are categorized under in different sections according to their usage and functionality associated with them

IP Routing Protocol Sub Configuration Mode Commands

  • Network <ip-address>

User Mode Commands

  • Disconnect
  • Enable
  • ping <host name> ( Give the name of label that is assigned to the device used)
  • ping <ip address> ( The numeric label assigned to devices in network)

Sub Interface Sub Configuration Mode Commands

  • Frame-relay interface-dlci<dlci_num>
  • Frame-relay map<protocol-name> <ip-address> <dlci_num>
  • Frame-relay map<protocol-name> <ip-address> <dlci_num> broadcast
  • Frame-relay map<protocol-name> <ip-address> <dlci_num> broadcast ietf
  • ip address<ip-address> <subnet-mask> ( A subnet mask is used to split IP networks into sub groups)

Global Configuration Mode Commands

  • Access-list <list-num> {permit | deny} <source-ip-address>
  • Access-list <list-num> {permit | deny} <any>
  • Access-list <list-num> {permit | deny} <ip-address> <ip-address>
  • Access-list <list-num> {permit | deny} <host-name> <ip-address>
  • Dialer-list<list-num>protocol ip permit
  • Interface fastethernet <pnum>
  • Ip default-gateway <ip-address>
  • Enable password <password>

Privilege Mode Commands

  • Clear arp-cache
  • Configure terminal
  • Copy running-config startup-config
  • Debug ip packet
  • Erase startup-config
  • Disconnect <TELNET_ID>
  • How interfaces ethernet 0
  • Show interfaces loopback 0
  • Show interfaces serial 0

Interface Sub Configuration Mode Commands

  • Bandwidth <kilobits> (Tells you about the data packet transfer rate)
  • Cdp enable
  • Clock rate <bps>
  • Compress stac <num> in
  • Description <string>
  • Dialer-group<dialer_list_#>

Line Sub Configuration Mode Commands

  • Exec-timeout <minutes> [seconds]
  • Logging synchronous
  • Password <password>

Internet Protocol Routing Sub Configuration Mode Commands

  • Network <ip-address>

In order to get accurate results one needs to be sure of what command one is going. Make sure you are giving the commands in proper syntax without syntax error.The syntax should be followed exactly where brackets and dashes are exactly at same place. Don;t forget to replace the words with actual facts like IP of the machine,sub net mask and the password in actual.

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