Router Configuration | How To Configure Router

How to configure router in packet tracer

Router Configuration VLSM

Given Network: 198.10.10.0

Required hosts on Router 1: 120

Required hosts on Router 2: 30

How to configure router in packet tracer

R1<= 120 hosts

120<= 2n – 2

120<= 27 – 2

120<= 128 – 2

120<= 126

Total number of network bits= 32

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

i.e. 198.10.10.0/25

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 198.10.10.128/?

Now find FVH, LVH and Broadcast address

Given Network19810100
First Valid Host-FVH19810101
Last Valid Host-LVH1981010126
Broadcast1981010127
New Network1981010128

R2<= 30 hosts

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 new network i.e. Router 2)

i.e. 198.10.10.128/27

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 198.10.10.160/?

Now find FVH, LVH and Broadcast address

Given Network1981010128
First Valid Host-FVH1981010129
Last Valid Host-LVH1981010158
Broadcast1981010159
New Network1981010160

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. 198.10.10.160/30

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 3. This network can be used in future.

so the new network is 198.10.10.164/?

Now find FVH, LVH and Broadcast address

Given Network1981010160
First Valid Host-FVH1981010161
Last Valid Host-LVH1981010162
Broadcast1981010163
New Network1981010164

Basic Configuration on Router 1

Router>enable
Router#configure terminal
Router(config)#hostname R1
R1(config)#interface fastEthernet 0/0
R1(config-if)#ip address 198.10.10.1 255.255.255.128
R1(config-if)#no  shutdown
R1(config-if)#exit  

R1(config)#interface serial 0/0/0
R1(config-if)#ip address 198.10.10.161 255.255.255.252
R1(config-if)#clock rate 64000
R1(config-if)#no shutdown
R1(config-if)#exit
R1(config)#exit
R1#write

Basic Configuration on Router 2

Router>enable
Router#configure terminal
Router(config)#hostname R2
R2(config)#interface fastEthernet 0/0
R2(config-if)#ip address 198.10.10.129 255.255.255.224
R2(config-if)#no shutdown
R2(config-if)#exit  

R2(config)#interface serial 0/1/0
R2(config-if)#ip address 198.10.10.162 255.255.255.252
R2(config-if)#no shutdown
R2(config-if)#exit
R2(config)#exit
R2#write

Verification on Router 1

R1#show ip route     
198.10.10.0/24 is variably subnetted, 2 subnets, 2 masks
C       198.10.10.0/25 is directly connected, FastEthernet0/0
C       198.10.10.160/30 is directly connected, Serial0/0/0

Verification on Router 2

R2#show ip route          
198.10.10.0/24 is variably subnetted, 2 subnets, 2 masks
C       198.10.10.128/27 is directly connected, FastEthernet0/0
C       198.10.10.160/30 is directly connected, Serial0/1/0
How to configure router in packet tracer

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