Question
TUT Company recently installed a new router in their office. Complete the network installation by performing the initial router configurations and configuring RIPv2 routing using the router command line interface (CLI) on the R2-TUT.
Name of the router is R2-TUT
Enable-secret password is Sec@ret
The password to access user EXEC mode using the console is Sec@ret2
The password to allow telnet access to the router is Sec@ret3
IPV4 addresses must be configured as follows:
Ethernet network 213.123.20.128/27 – router has last assignable host address in subnet
Serial network is 200.0.1.16/28 – router has last assignable host address in the subnet. Interfaces should be enabled.
Router protocol is RIPv2
Enable-secret password is Sec@ret
The password to access user EXEC mode using the console is Sec@ret2
The password to allow telnet access to the router is Sec@ret3
IPV4 addresses must be configured as follows:
Ethernet network 213.123.20.128/27 – router has last assignable host address in subnet
Serial network is 200.0.1.16/28 – router has last assignable host address in the subnet. Interfaces should be enabled.
Router protocol is RIPv2
Answer and Explanation
1) Name the router:
Router>enable
Router#configure terminal
Router(config)#hostname R2-TUT
Router#configure terminal
Router(config)#hostname R2-TUT
2) Set secret password:
R2-TUT(config)# enable secret Sec@ret
3) Set password for the console:
R2-TUT(config)#line console 0
R2-TUT(config-line)#password Sec@ret2
R2-TUT(config-line)#login
R2-TUT(config-line)#exit
R2-TUT(config-line)#password Sec@ret2
R2-TUT(config-line)#login
R2-TUT(config-line)#exit
4) Set the Telnet password:
R2-TUT(config)#line vty 0 4
R2-TUT(config-line)#password Sec@ret3
R2-TUT(config-line)#login
R2-TUT(config-line)#exit
R2-TUT(config-line)#password Sec@ret3
R2-TUT(config-line)#login
R2-TUT(config-line)#exit
5) Assign IP address for Ethernet interface (Fa0/0):
The Ethernet network 213.123.20.128/27 has:
Increment:32 (/27 = 255.255.255.224 or 1111 1111.1111 1111.1111 1111.1110 0000)
Network address: 213.123.20.128
Broadcast address: 213.123.20.159 (because 128 + 32 – 1 = 159)
Network address: 213.123.20.128
Broadcast address: 213.123.20.159 (because 128 + 32 – 1 = 159)
Therefore the last assignable host address in this subnet is 213.123.20.158 and we will assign it to Fa0/0 interface with these commands:
R2-TUT(config)# interface fa0/0
R2-TUT(config-if)#ip address 213.123.20.158 255.255.255.224
R2-TUT(config-if)#no shutdown
R2-TUT(config-if)#exit
R2-TUT(config-if)#ip address 213.123.20.158 255.255.255.224
R2-TUT(config-if)#no shutdown
R2-TUT(config-if)#exit
6) Assign IP address for Serial interface (S0/0):
Serial network 200.0.1.16/28 has:
Increment:16 (/28 = 255.255.255.240 or 1111 1111.1111 1111.1111 1111.1111 0000)
Network address: 200.0.1.16
Broadcast address: 200.0.1.31 (because 16 + 16 – 1 = 31)
Network address: 200.0.1.16
Broadcast address: 200.0.1.31 (because 16 + 16 – 1 = 31)
So the last assignable host address in this subnet is 200.0.1.30. Finally we assign it to s0/0/0 interface:
R2-TUT(config)# interface s0/0/0
R2-TUT(config-if)#ip address 200.0.1.30 255.255.255.240
R2-TUT(config-if)#no shutdown
R2-TUT(config-if)#exit
R2-TUT(config-if)#ip address 200.0.1.30 255.255.255.240
R2-TUT(config-if)#no shutdown
R2-TUT(config-if)#exit
7) Configure RIP v2 routing protocol:
R2-TUT(config)#router rip
R2-TUT(config-router)#version 2
R2-TUT(config-router)#network 213.123.20.0
R2-TUT(config-router)#network 200.0.1.0
R2-TUT(config-router)#end
R2-TUT#copy running-config startup-config
R2-TUT(config-router)#version 2
R2-TUT(config-router)#network 213.123.20.0
R2-TUT(config-router)#network 200.0.1.0
R2-TUT(config-router)#end
R2-TUT#copy running-config startup-config
Note: We should use classful networks (213.123.20.0 & 200.0.1.0) when configuring RIP. If we use detailed networks (213.123.20.128 & 200.0.1.16) the router will automatically convert them into classful networks.