In this lab, I am gonna teach you how to configure static routing on 3 routers in packet tracer.
Table of Contents
Configure Static Routing VLSM
Given Network: 192.80.10.0
1) Required hosts on Router 1= 28
2) Required hosts on Router 2= 20
3) Required hosts on Router 3= 6
R1<= 28
28<= 2n – 2
28<= 25 – 2
28<= 32 – 2
28<= 30
Total number of network bits = 32
32 – n = 32 – 5 = 27 (CIDR value of given network i.e. Router 1)
i.e. 192.80.10.0/27
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 2.
So the new network is 192.80.10.32/?
Now find FVH, LVH and Broadcast address
| Given Network | 192 | 80 | 10 | 0 |
| First Valid Host-FVH | 192 | 80 | 10 | 1 |
| Last Valid Host-LVH | 192 | 80 | 10 | 30 |
| Broadcast | 192 | 80 | 10 | 31 |
| New Network | 192 | 80 | 10 | 32 |
R2<= 20
20<= 2n – 2
20<= 25 – 2
20<= 32 – 2
20<= 30
Total number of network bits = 32
32 – n = 32 – 5 = 27 (CIDR value of given network i.e. Router 2)
i.e. 192.80.10.32/27
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 3.
So the new network is 192.80.10.64/?
Now find FVH, LVH and Broadcast address
| Given Network | 192 | 80 | 10 | 32 |
| First Valid Host-FVH | 192 | 80 | 10 | 33 |
| Last Valid Host-LVH | 192 | 80 | 10 | 62 |
| Broadcast | 192 | 80 | 10 | 63 |
| New Network | 192 | 80 | 10 | 64 |
R3<= 6
6<= 2n – 2
6<= 23 – 2
6<= 8 – 2
6<= 6
Total number of network bits = 32
32 – n = 32 – 3 = 29 (CIDR value of given network i.e. Router 3)
i.e. 192.80.10.64/29
N.S.M = 11111111. 11111111. 11111111.11111000
= 255.255.255.248
Block Size = 256 – N.S.M
= 256 – 248 = 8
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 192.80.10.72/?
Now find FVH, LVH and Broadcast address
| Given Network | 192 | 80 | 10 | 64 |
| First Valid Host-FVH | 192 | 80 | 10 | 65 |
| Last Valid Host-LVH | 192 | 80 | 10 | 70 |
| Broadcast | 192 | 80 | 10 | 71 |
| New Network | 192 | 80 | 10 | 72 |
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. 198.10.10.72/30
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 192.80.10.76/?
Now find FVH, LVH and Broadcast address
| Given Network | 192 | 80 | 10 | 72 |
| First Valid Host-FVH | 192 | 80 | 10 | 73 |
| Last Valid Host-LVH | 192 | 80 | 10 | 74 |
| Broadcast | 192 | 80 | 10 | 75 |
| New Network | 192 | 80 | 10 | 76 |
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. 198.10.10.76/30
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 192.80.10.80/?
Now find FVH, LVH and Broadcast address
| Given Network | 192 | 80 | 10 | 76 |
| First Valid Host-FVH | 192 | 80 | 10 | 77 |
| Last Valid Host-LVH | 192 | 80 | 10 | 78 |
| Broadcast | 192 | 80 | 10 | 79 |
| New Network | 192 | 80 | 10 | 80 |
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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 192.80.10.1 255.255.255.224 R1(config-if)#no shutdown R1(config-if)#exit R1(config)#interface serial 0/0/0 R1(config-if)#ip address 192.80.10.73 255.255.255.252 R1(config-if)#clock rate 64000 R1(config-if)#no shutdown 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 192.80.10.33 255.255.255.224 R2(config-if)#no shutdown R2(config-if)#exit R2(config)#interface serial 0/1/0 R2(config-if)#ip address 192.80.10.74 255.255.255.252 R2(config-if)#no shutdown R2(config-if)#exit R2(config)#interface serial 0/0/0 R2(config-if)#ip address 192.80.10.77 255.255.255.252 R2(config-if)#clock rate 64000 R2(config-if)#no shutdown R2(config-if)#exit R2(config)#exit R2#write |
Basic Configuration on Router 3
| Router>enable Router#configure terminal Router(config)#hostname R3 R3(config)#interface fastEthernet 0/0 R3(config-if)#ip address 192.80.10.65 255.255.255.248 R3(config-if)#no shutdown R3(config-if)#exit R3(config)#interface serial 0/1/0 R3(config-if)#ip address 192.80.10.78 255.255.255.252 R3(config-if)#no shutdown R3(config-if)#exit R3(config)#exit R3#write |
Configure Static Routing – Static Configuration on Router 1
| R1>enable R1#configure terminal R1(config)#ip route 192.80.10.32 255.255.255.224 192.80.10.74 R1(config)#ip route 192.80.10.64 255.255.255.248 192.80.10.74 R1(config)# R1(config)#ip route 192.80.10.72 255.255.255.252 192.80.10.74 R1(config)#ip route 192.80.10.76 255.255.255.252 192.80.10.74 R1(config)#exit R1#write |
Configure Static Routing – Static Configuration on Router 2
| R2>enable R2#configure terminal R2(config)#ip route 192.80.10.0 255.255.255.224 192.80.10.73 R2(config)#ip route 192.80.10.64 255.255.255.248 192.80.10.78 R2(config)# R2(config)#ip route 192.80.10.72 255.255.255.252 192.168.10.73 R2(config)#ip route 192.80.10.76 255.255.255.252 192.168.10.78 R2(config)#exit R2#write |
Static Configuration on Router 3
| R3>enable R3#configure terminal R3(config)#ip route 192.80.10.0 255.255.255.224 192.80.10.77 R3(config)#ip route 192.80.10.32 255.255.255.224 192.80.10.77 R3(config)# R3(config)#ip route 192.80.10.72 255.255.255.252 192.80.10.77 R3(config)#ip route 192.80.10.76 255.255.255.252 192.80.10.77 R3(config)#exit R3#write |
Verification on Router 1
| R1#show ip route 192.80.10.0/24 is variably subnetted, 5 subnets, 3 masks C 192.80.10.0/27 is directly connected, FastEthernet0/0 S 192.80.10.32/27 [1/0] via 192.80.10.74 S 192.80.10.64/29 [1/0] via 192.80.10.74 C 192.80.10.72/30 is directly connected, Serial0/0/0 S 192.80.10.76/30 [1/0] via 192.80.10.74 |
Verification on Router 2
| R2#show ip route 192.80.10.0/24 is variably subnetted, 5 subnets, 3 masks S 192.80.10.0/27 [1/0] via 192.80.10.73 C 192.80.10.32/27 is directly connected, FastEthernet0/0 S 192.80.10.64/29 [1/0] via 192.80.10.78 C 192.80.10.72/30 is directly connected, Serial0/1/0 C 192.80.10.76/30 is directly connected, Serial0/0/0 |
Verification on Router 3
| R3#show ip route 192.80.10.0/24 is variably subnetted, 5 subnets, 3 masks S 192.80.10.0/27 [1/0] via 192.80.10.77 S 192.80.10.32/27 [1/0] via 192.80.10.77 C 192.80.10.64/29 is directly connected, FastEthernet0/0 S 192.80.10.72/30 [1/0] via 192.80.10.77 C 192.80.10.76/30 is directly connected, Serial0/1/0 |
