CertExams.com Simulator Lab Exercises Answers

NAT Scenario-3

Description: The purpose of this Lab is to configure NAT on the Destination router (NAT outside source) and the source router (NAT inside source) 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

NAT Mapping Table for Outside Source

Outside Local Outside Global
10.1.1.1 200.200.200.5
10.1.1.2 200.200.200.6


Instructions:

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

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

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

4. Create IP NAT Mapping (Hint: use outside source static command) on R2

5. Define IP NAT Inside and IP NAT Outside interfaces on R2

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

Note: You need to assign the IP addresses and make the interfaces up (by issuing no shutdown commands at appropriate interfaces) for all the devices before proceeding with the following commands.

On R1:

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#

On R2

R2>enable
R2#conf term
R2(config)#ip nat outside source static 10.1.1.1 200.200.200.5
R2(config)#ip nat outside source static 10.1.1.2 200.200.200.6
R2(config)#interface serial 0
R2(config-if)#ip nat outside
R2(config-if)#exit
R2(config)#interface ethernet 0
R2(config-if)#ip nat inside
R2(config-if)#exit
R2(config)#exit
R2#

PC1:ping R2
PC1:ping 200.200.200.5
PC1:ping 200.200.200.6

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