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Networking Essay

713 words - 3 pages

[CCNA] Cisco Commands Cheat Sheet #1
CCNA RnS, Cisco, Network September 16, 2013 Comments: 13
In this serie of 4-5 posts, we’ll try to create a simple Cisco Commands Cheat Sheet as a reference for CCNA students.
* Cisco Commands Cheat Sheet #2
* Cisco Commands Cheat Sheet #3
* Cisco Commands Cheat Sheet #4
* Cisco Commands Cheat Sheet #5
Router Modes:
* Router>: User mode = Limited to basic monitoring commands
* Router#: Privileged mode (exec-level mode) = Provides access to all other router commands
* Router(config)#: global configuration mode = Commands that affect the entire system
* Router(config-if)#: interface mode = Commands that affect interfaces
* ...view middle of the document...

11 ! or DHCP
SW1(config-if)# no shutdown
Setting the default gateway:
SW1(config)# ip default-gateway
Saving configuration:
SW1# copy running-config startup-config
Destination filename [startup-config]? ! Press enter to confirm file name.
Building configuration…

! Short for write memory.
SW1# wr
Building configuration…
Working environment:
name lookup, history, exec-timeout and logging behavior…, also valid for line con 0.
SW1(config)# no ip domain-lookup
SW1(config)# line vty 0 4
SW1(config-line)# history size 15
SW1(config-line)# exec-timeout 10 30
SW1(config-line)# logging synchronous
Configuring switch to use SSH:
* Configure DNS domain name:
SW1(config)# ip domain-name
* Configure a username and password:
SW1(config)# username admin password cisco
* Generate encryption keys:
The size of the key modulus in the range of 360 to 2048
SW1(config)# crypto key generate rsa
How many bits in the modulus [512]: 1024
* Define SSH version to use:
SW1(config)# ip ssh version 2
* Enable vty lines to use SSH:
SW1(config)# line vty 0 4
SW1(config-line)# login local
! You can set vty lines to use only telnet or only ssh or both as in the example.
SW1(config-line)# transport input telnet ssh
Used to create shortcuts for long commands.
SW1(config)# alias exec c configure terminal
SW1(config)# alias exec s show ip...

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