CISCO PRELIMS

Basic Cisco IOS commands

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Shows available commands

enable

Enter privileged EXEC mode.

show running-config

Displays current active configuration

show startup-config

Displays config saved in NVRAMs

show ip interface brief

Quick summary of interfaces, IPs, and status.

copy running-config startup-config

Save current config to NVRAM.

configure terminal

enter global config mode

hostname S1

Change device name to S1

enable secret cisco

Set encrypted privileged mode password to cisco.

service password-encryption

Encrypt all plain-text passwords.

line console 0

Configure console line.

Set console password to alson.

password alson

Enable login with password.

login

line vty 0 4

Configure Telnet/SSH (virtual lines).

exec-timeout 2

Auto-logout after idle time (ex. 2 mins)

interface g0/0

Enter interface mode (GigabitEthernet 0/0)

ip address 192.168.4.2 255.255.255.0

Assign IP from 192.168.4.2 to 255.255.255.0

no shutdown

Enable the interface

description hello

Add description to interface (hello)

router rip

Enable RIP routing protocol

network 192.168.1.1

Advertise a network 192.168.1.1

ping <ip>

Test connectivity

traceroute (example)

Trace the path packets take

show version

IOS version, hardware info, uptime

show running-config

Current config

show interfaces

Detailed interface info

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