CertExams.com Simulator Lab Exercises Answers

NAT Scenario-1

Description: The purpose of this exercise is to configure NAT on the source router (NAT inside source) and test for connectivity by pinging a remote router. 


IP Address Assignment Table

Device Interface IP Address Mask
R1 S0
E0

200.200.200.1
192.168.1.13

255.255.255.0
255.255.0.0
R2 S0
E0
200.200.200.2
10.1.1.4
255.255.255.0
255.0.0.0
PC1   192.168.1.10 255.255.0.0
PC2   192.168.1.11 255.255.0.0
PC3   10.1.1.1 255.0.0.0
PC4   10.1.1.2 255.0.0.0
SW1   192.168.1.12 255.255.0.0
SW2   10.1.1.3 255.0.0.0


NAT Mapping Table for Inside Source

Inside Local Inside Global
192.168.1.10 200.200.200.3
192.168.1.11 200.200.200.4


Instructions:

1. Assign IP addresses on all the devices as per the above table

2. Enable routing on all routers (you can use RIP/EIGRP/OSPF routing)

3. Create IP NAT Mapping (Hint: use inside source static command) on R1

4. Define IP NAT Inside and IP NAT Outside interfaces on R1

5. Test for Connectivity from PC1 to R2 by issuing ping command

Note: You need to do the following before proceeding with the following commands

1. Assign the IP addresses and make the interfaces up (by issuing no shutdown commands at appropriate interfaces) for all the devices

2. Enable routing on the network. You can use rip/eigrp/ospf for this purpose

R1>enable
R1#conf term
R1(config)#ip nat inside source static 192.168.1.10 200.200.200.3
R1(config)#ip nat inside source static 192.168.1.11 200.200.200.4
R1(config)#interface serial 0
R1(config-if)#ip nat outside
R1(config-if)#exit
R1(config)#interface ethernet 0
R1(config-if)#ip nat inside
R1(config-if)#exit
R1(config)#exit
R1#

PC1:ping R2

 

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