Basic Router and Switch Configuration
1. Setting the Hostname
———————–
Router(config)#hostname AIUB
2. Setting the Banner MOTD
————————–
AIUB(config)#banner motd #Unauthrozied Access Prohibited!#
3. Securing the Privileged EXEC Mode/enable mode
————————————
AIUB(config)#enable secret cisco
4. Secure all the ways to access the Router
——————————————-
AIUB(config)#line console 0
AIUB(config-line)#password cisco
AIUB(config-line)#login
AIUB(config-line)#exit
AIUB(config)#line vty 0 4
AIUB(config-line)#password cisco
AIUB(config-line)#login
AIUB(config-line)#exit
5. Enabling Password Encryption Service globally
————————————————
AIUB(config)#service password-encryption
6. Setting the Minimum password length
————————————–
AIUB(config)#security passwords min-length 8
7. Enabling IPv6 Unicast Routing
——————————–
AIUB(config)#ipv6 unicast-routing
8. Configuring Interface IP Addresses
————————————-
AIUB(config)#int g0/0
AIUB(config-if)#ip address 172.20.3.254 255.255.252.0
AIUB(config-if)#ipv6 address 2001:210:BAD:1::/64
AIUB(config-if)#description User LAN
AIUB(config-if)#no shutdown
AIUB(config-if)#exit
AIUB(config)#int g0/1
AIUB(config-if)#ip address 172.16.4.30 255.255.255.224
AIUB(config-if)#ipv6 address 2001:210:BAD:9::/64
AIUB(config-if)#description Server LAN
AIUB(config-if)#no shutdown
AIUB(config-if)#exit
9. Creating a Local User Database
———————————
AIUB(config)#username admin secret admin123
AIUB(config)#username jradmin secret jradmin123
AIUB(config)#line console 0
AIUB(config-line)#login local
AIUB(config-line)#exit
AIUB(config)#line vty 0 4
AIUB(config-line)#login local
AIUB(config-line)#exit
10. Configuring SSH
——————-
a) Configure IP Domain Name
—————————
AIUB(config)#ip domain-name aiub.edu
b) Generate Cryptographic Key
—————————–
AIUB(config)#crypto key generate rsa
c) Enable SSH in Line vty
————————-
AIUB(config)#line vty 0 4
AIUB(config-line)#transport input ssh
To check, use the following command in the command prompt of the PC
PC>ssh -l admin 172.20.3.254
d) Configuring Optional SSH Parameters
————————————–
AIUB(config)#ipssh version 2
AND authentication code is below
AIUB(config)#ipssh authentication-retries 5
AIUB(config)#ipssh time-out 60
Switch Configuration
hostname USW
enable secret 5 $1$mERr$28TNE07yx85XIfNWklfaG/
interface Vlan1
ip address 172.16.3.253 255.255.252.0
ip default-gateway 172.16.3.254
banner motd ^CUnauthorized Access Prohibited!^C
line con 0
password smpa$$word
login
line vty 0 4
password smpa$$word
login
line vty 5 15
login
hostname SSW
enable secret 5 $1$mERr$28TNE07yx85XIfNWklfaG/
interface Vlan1
ip address 172.16.8.109 255.255.255.240
ip default-gateway 172.16.8.110
banner motd ^CUnauthorized Access Prohibited!^C
line con 0
password smpa$$word
login
line vty 0 4
password smpa$$word
login
line vty 5 15
login
end
router
The cable used for connections
Here are connection tips to remember:
category 1:Hub, Switch
category 2:Router, Host, Server
Or
They are also divided into two groups.
Group 1: Router, Host, Server
Group 2: Hub, Switch
To connect the COM port of a host ( PC, Server or Printer) to the CONSOLE port of a router or switch?” we use a rollover cable.
Basically, you use an RJ 45 to DB9 Female cable converter for proper communication between the two Organizational Unique Identifier (OUI) is the first 24 bits of a MAC address for every network device.
This shows the specific vendor, manufacturer, or organization for that device as assigned by the Institute of Electrical and Electronics Engineers, (IEEE).
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