Basic Cisco Router Configuration | Cisco Packet Tracer Tutorial

In this lab, I am gonna teach you Basic Cisco Router Configuration | Cisco Packet Tracer Tutorial

Basic Cisco Router Configuration VLSM

Given Network: 196.50.50.0

1) Required hosts on Router 1= 100

2) Required hosts on Router 2= 60

3) Required hosts on Router 3= 30

R1<= 100

100<= 2ⁿ – 2

100<= 2⁷ – 2

100<= 128 – 2

100<= 126

Total number of network bits = 32

32 – n = 32 – 7 = 25 (CIDR value of given network i.e. Router 1)

i.e. 196.50.50.0/25

N.S.M = 11111111. 11111111. 11111111.10000000

                        = 255.255.255.128

Block Size        = 256 – N.S.M

                        = 256 – 128 = 128

Note: Add this block size in given network so that we can get our new network for Router 2.

So the new network is 196.50.50.0/?

Now find FVH, LVH and Broadcast address

Given Network	196	50	50	0
First Valid Host-FVH	196	50	50	1
Last Valid Host-LVH	196	50	50	126
Broadcast	196	50	50	127
New Network	196	50	50	128

R2<= 14

60<= 2ⁿ – 2

60<= 2⁶ – 2

60<= 64 – 2

60<= 62

Total number of network bits = 32

32 – n = 32 – 6 = 26 (CIDR value of given network i.e. Router 2)

i.e. 196.50.50.128/26

N.S.M = 11111111. 11111111. 11111111.11000000

                        = 255.255.255.192

Block Size        = 256 – N.S.M

                        = 256 – 192 = 64

Note: Add this block size in given network so that we can get our new network for Router 3.

So the new network is 196.50.50.192/?

Now find FVH, LVH and Broadcast address

Given Network	196	50	50	128
First Valid Host-FVH	196	50	50	129
Last Valid Host-LVH	196	50	50	190
Broadcast	196	50	50	191
New Network	196	50	50	192

R3<= 30

30<= 2ⁿ – 2

30<= 2⁵ – 2

30<= 32 – 2

30<= 30

Total number of network bits = 32

32 – n = 32 – 5 = 27 (CIDR value of given network i.e. Router 3)

i.e.196.50.50.192/27

N.S.M = 11111111. 11111111. 11111111.11100000

                        = 255.255.255.224

Block Size        = 256 – N.S.M

                        = 256 – 224 = 32

Note: Add this block size in given network so that we can get our new network for Router 1 and 2 (Virtual Network).

So the new network is 196.50.50.224/?

Now find FVH, LVH and Broadcast address

Given Network	196	50	50	192
First Valid Host-FVH	196	50	50	193
Last Valid Host-LVH	196	50	50	222
Broadcast	196	50	50	223
New Network	196	50	50	224

Router 1 & 2 <= 2 hosts (we required only two IP to connect 2 routers)

2 <= 2ⁿ – 2

2 <= 2² – 2

2 <= 4 – 2

2 <= 2

Total number of network bits = 32

32 – n = 32 – 2 = 30 (CIDR of Virtual network (R1&R2)

i.e. 196.50.50.224/30

N.S.M = 11111111.11111111.11111111.11111100

= 255.255.255.252

Block Size        = 256 – N.S.M

= 256 – 252 = 4

Note: Add this block size in given network so that we can get our new network for Router 2 and 3 (Virtual Network).

so the new network is 196.50.50.228/?

Now find FVH, LVH and Broadcast address

Given Network	196	50	50	224
First Valid Host-FVH	196	50	50	225
Last Valid Host-LVH	196	50	50	226
Broadcast	196	50	50	227
New Network	196	50	50	228

Router 2 & 3 <= 2 hosts (we required only two IP to connect 2 routers)

2 <= 2ⁿ – 2

2 <= 2² – 2

2 <= 4 – 2

2 <= 2

Total number of network bits = 32

32 – n = 32 – 2 = 30 (CIDR of Virtual network (R2&R3)

i.e. 196.50.50.228/30

N.S.M = 11111111.11111111.11111111.11111100

= 255.255.255.252

Block Size        = 256 – N.S.M

= 256 – 252 = 4

Note: Add this block size in given network so that we can get our new network for Router 4. This network can be used in future.

so the new network is 196.50.50.232/?

Now find FVH, LVH and Broadcast address

Given Network	196	50	50	228
First Valid Host-FVH	196	50	50	229
Last Valid Host-LVH	196	50	50	230
Broadcast	196	50	50	231
New Network	196	50	50	232

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Basic Cisco Router Configuration on Router 1

Router>enable Router#configure terminal Router(config)#hostname R1 R1(config)#interface fastEthernet 0/0 R1(config-if)#ip address 196.50.50.1 255.255.255.128 R1(config-if)#no  shutdown R1(config-if)#exit   R1(config)#interface serial 0/0/0 R1(config-if)#ip address 196.50.50.225 255.255.255.252 R1(config-if)#clock rate 64000 R1(config-if)#no shutdown R1(config-if)#exit R1(config)#exit R1#write

Basic Cisco Router Configuration on Router 2

Router>enable Router#configure terminal Router(config)#hostname R2 R2(config)#interface fastEthernet 0/0 R2(config-if)#ip address 196.50.50.129 255.255.255.192 R2(config-if)#no  shutdown R2(config-if)#exit   R2(config)#interface serial 0/1/0 R2(config-if)#ip address 196.50.50.226 255.255.255.252 R2(config-if)#no  shutdown R2(config-if)#exit   R2(config)#interface serial 0/0/0 R2(config-if)#ip address 196.50.50.229 255.255.255.252 R2(config-if)#clock rate 64000 R2(config-if)#no shutdown R2(config-if)#exit R2(config)#exit R2#write

Basic Cisco Router Configuration on Router 3

Router>enable Router#configure terminal Router(config)#hostname R3 R3(config)#interface fastEthernet 0/0 R3(config-if)#ip address 196.50.50.193 255.255.255.224 R3(config-if)#no  shutdown R3(config-if)#exit   R3(config)#interface serial 0/1/0 R3(config-if)#ip address 196.50.50.230 255.255.255.252 R3(config-if)#no  shutdown R3(config-if)#exit R3(config)#exit R3#write

Verification on Router 1

R1#show ip route      196.50.50.0/24 is variably subnetted, 2 subnets, 2 masks C       196.50.50.0/25 is directly connected, FastEthernet0/0 C       196.50.50.224/30 is directly connected, Serial0/0/0

Verification on Router 2

R2#show ip route      196.50.50.0/24 is variably subnetted, 3 subnets, 2 masks C       196.50.50.128/26 is directly connected, FastEthernet0/0 C       196.50.50.224/30 is directly connected, Serial0/1/0 C       196.50.50.228/30 is directly connected, Serial0/0/0

Verification on Router 3

R3#show ip route      196.50.50.0/24 is variably subnetted, 2 subnets, 2 masks C       196.50.50.192/27 is directly connected, FastEthernet0/0 C       196.50.50.228/30 is directly connected, Serial0/1/0

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