Cisco Command Notes

1. Navigation Commands (Modes)

User EXEC ( > )

Basic access

Router>

Privileged EXEC ( # )

Access with: enable

Global Configuration (config)

Enter with: configure terminal

2. Basic Device Setup (Global Config)

Set hostname

Ex: hostname Router1

Disable DNS lookup

Ex: no ip domain-lookup

3. Password & Security Commands

Privileged EXEC Password (Global Config)

Ex: enable secret Cisco_CCNA7

Encrypt all passwords (Global Config)

service password-encryption

Set Minimum password length

security passwords min-length 10

4. Banner Message (Global Config)

banner motd #Unauthorized access prohibited#

5. Local User (Global Config)

username netadmin secret Cisco_CCNA7

6. Line Configuration

Console Line (Line Config Mode)

line console 0

exec-timeout 5 0

VTY Lines (Line Config Mode)

line vty 0 4

transport input ssh

exec-timeout 5 0

7. SSH Configuration

Set domain name (Global Config)

ip domain-name ccna-lab.com

Generate RSA keys (Global Config)

crypto key generate rsa 1024

Force SSH version 2 (Global Config)

ip ssh version 2

8. Interface Configuration (Interface Config Mode)

Enter interface

interface g0/0

Set an IPv4 address

ip address 192.168.1.126 255.255.255.224

Set an IPv6 Global address

ipv6 address 2001:db8:acad:a::1/64

Set an IPv6 link-local address

ipv6 address fe80::1 link-local

Enable an Interface

No shutdown

9. Switch Configuration

Assigning ip and enabling interface (Interface Config)

Step 1. Enter Vlan 1

ex. interface vlan 1

Step 2. Assign IP

ex. ip address (Address) (Subnet Mask)

Step 3. Enable SVI

ex. no shutdown

Step 4.Configure Default Gateway (Global Config)

ex. ip default-gateway (gateway address)

Step 5. Enable Telnet (Line Config)

(Global config)line vty 0 4

password cisco

Verification Commands (Privileged EXEC)

Check interfaces

show ip interface brief

Check Ipv6 interfaces

show ipv6 interface brief

Test connectivity

ping [IP address]