[CCNA] Rangkuman konfigurasi Cisco #1

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
• Router(config-subif)#: subinterface mode = Commands that affect subinterfaces
• Router(config-line)#: line mode = Commands that affect in lines modes (console, vty, aux…)
• Router(config-router)#: router configuration mode

Merubah switch hostname:

1	Switch(config)# hostname SW1

Konfigurasi passwords:

1 2	SW1(config)# enable secret cisco    ! MD5 hash SW1(config)# enable password notcisco    ! Clear text

Securing console port:

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SW1(config)# line con 0 SW1(config-line)# password cisco SW1(config-line)# login

Securing terminal lines:

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SW1(config)# line vty 0 4 SW1(config-line)# password cisco SW1(config-line)# login

Encrypting passwords:

1	SW1(config)# service password-encryption

Konfigurasi banners:

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SW1(config)# banner motd $ -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- UNAUTHORIZED ACCESS IS PROHIBITED -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- $

Giving the switch an IP address:

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SW1(config)# interface vlan 1 SW1(config-if)# ip address 172.16.1.11 255.255.255.0    ! or DHCP SW1(config-if)# no shutdown

Setting the default gateway:

1	SW1(config)# ip default-gateway 172.16.1.1

Saving configuration:

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SW1# copy running-config startup-config Destination filename [startup-config]?    ! Press enter to confirm file name. Building configuration… [OK] ! Short for write memory. SW1# wr Building configuration… [OK]

Working environment:

name lookup, history, exec-timeout and logging behavior…, also valid for line con 0.

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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

Konfigurasi switch to use SSH:

• Configure DNS domain name:

1	SW1(config)# ip domain-name example.com

• Configure a username and password:

1	SW1(config)# username admin password cisco

• Generate encryption keys:

The size of the key modulus in the range of 360 to 2048

1 2	SW1(config)# crypto key generate rsa How many bits in the modulus [512]: 1024

• Define SSH version to use:

1	SW1(config)# ip ssh version 2

• Enable vty lines to use SSH:

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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

Aliases:

Used to create shortcuts for long commands.

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SW1(config)# alias exec c configure terminal SW1(config)# alias exec s show ip interface brief SW1(config)# alias exec sr show running-config

Description, speed and duplex:

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SW1(config)# interface fastEthernet 0/1 SW1(config-if)# description LINK TO INTERNET ROUTER SW1(config-if)# speed 100    ! Options: 10, 100, auto ! The range keyword used to set a group of interfaces at once. SW1(config)# interface range fastEthernet 0/5 – 10 SW1(config-if-range)# duplex full (options: half, full, auto)

Verify Basic Configuration:

• Shows information about the switch and its interfaces, RAM, NVRAM, flash, IOS, etc.

1	SW1# show version

• Shows the current configuration file stored in DRAM.

1	SW1# show running-config

• Shows the configuration file stored in NVRAM which is used at first boot process.

1	SW1# show startup-config

• Lists the commands currently held in the history buffer.

1	SW1# show history

• Shows an overview of all interfaces, their physical status, protocol status and ip address if assigned.

1	SW1# show ip interface brief

• Shows detailed information about the specified interface, its status, protocol, duplex, speed, encapsulation, last 5 min traffic.

1	SW1# show interface vlan 1

• Shows the description of all interfaces

1	SW1# show interfaces description

• Shows the status of all interfaces like connected or not, speed, duplex, trunk or access vlan.

1	SW1# show interfaces status

• Shows the public encryption key used for SSH.

1	SW1# show crypto key mypubkey rsa

• Shows information about the leased IP address (when an interface is configured to get IP address via a dhcp server)

1	SW1# show dhcp lease

Enjoy !

Sumber : http://m-shohiburridak.blogspot.com/2015/05/ccna-rangkuman-konfigurasi-cisco.html

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