The document describes tasks to configure NAT on routers R1 and R2. This includes dynamically NATing internal networks and loopbacks to external IP ranges, PAT for some internal networks, and static NAT for R7's loopbacks. EIGRP is configured internally with redistribution. Access-lists are used to define the NAT source addresses and pools are used to map them to external IP ranges. Connectivity to external sites is tested with ping.

1. Lab 20: NATing
Task
1. Configure IP Addresses as per given in topology.
2. Make sure EIGRP as 100 running over internal network.
3. On R2, Make sure R3 loopback will be Nating dynamically and the range is 114.52.8.3-114.52.8.6.
4. Network 10.0.23.0, 10.0.24.0, 10.0.47.0, 10.0.37.0 will be PAT.
5. R7 loopback will be statically NAT with IP's 114.52.8.10, 114.52.8.11, 114.52.8.12, 114.52.8.13.
6. R4 loopback's will be Nat. Use single ip 114.52.8.100 to accomplish this task.
7. On R1, Network 10.0.45.0, 10.0.15.0, 10.0.56.0 will be PAT.
8. R5 loopbacks will be dynamically Nating, The Range for Nating are 113.24.55.101 -
113.24.55.104.
9. R6 loopback will be Nat. Use single ip 113.24.55.254 to accomplish this task.
10. Make sure all networks and loopbacks ping netwaxlab.com and blog.eincop.com.
Figure 1 Topology

2. Lab 20: NATing
Solution
 Task 2: Make sure EIGRP as 100 running over internal network.
R1
router eigrp 100
redistribute static metric 1 1 1 1 1
network 10.0.15.0 0.0.0.255
network 10.0.56.0 0.0.0.255
no auto-summary
R2
router eigrp 100
redistribute static metric 1 1 1 1 1
network 10.0.23.0 0.0.0.255
network 10.0.24.0 0.0.0.255
no auto-summary
R3
router eigrp 100
network 3.3.1.0 0.0.0.255
network 3.3.2.0 0.0.0.255
network 3.3.3.0 0.0.0.255
network 3.3.4.0 0.0.0.255
network 10.0.23.0 0.0.0.255
network 10.0.37.0 0.0.0.255
no auto-summary
R4
router eigrp 100
network 4.4.1.0 0.0.0.255
network 4.4.2.0 0.0.0.255
network 4.4.3.0 0.0.0.255
network 4.4.4.0 0.0.0.255
network 10.0.24.0 0.0.0.255
network 10.0.45.0 0.0.0.255
network 10.0.47.0 0.0.0.255
no auto-summary

3. Lab 20: NATing
R5
router eigrp 100
network 5.5.1.0 0.0.0.255
network 5.5.2.0 0.0.0.255
network 5.5.3.0 0.0.0.255
network 5.5.4.0 0.0.0.255
network 10.0.15.0 0.0.0.255
network 10.0.45.0 0.0.0.255
no auto-summary
R6
router eigrp 100
network 6.6.1.0 0.0.0.255
network 6.6.2.0 0.0.0.255
network 6.6.3.0 0.0.0.255
network 6.6.4.0 0.0.0.255
network 10.0.56.0 0.0.0.255
no auto-summary
R7
router eigrp 100
network 7.7.1.0 0.0.0.255
network 7.7.2.0 0.0.0.255
network 7.7.3.0 0.0.0.255
network 7.7.4.0 0.0.0.255
network 10.0.37.0 0.0.0.255
network 10.0.47.0 0.0.0.255
no auto-summary
During NAT, You need to use commands on R1 and R2
R1 & R2
interface f0/0
ip nat outside
exit
int se0/0
ip nat inside
exit

4. Lab 20: NATing
int se0/1
ip nat inside
exit
 Task 3: On R2, Make sure R3 loopback will be Nating dynamically and the range is 114.52.8.3 -
114.52.8.6.
R2
ip access-list extended NAT
permit ip 3.3.1.0 0.0.0.255 any
permit ip 3.3.2.0 0.0.0.255 any
permit ip 3.3.3.0 0.0.0.255 any
permit ip 3.3.4.0 0.0.0.255 any
exit
ip nat pool R3 114.52.8.3 114.52.8.6 netmask 255.255.255.0
ip nat inside source list NAT pool R3
 Task 4: Network 10.0.23.0, 10.0.24.0, 10.0.47.0, 10.0.37.0 will be PAT.
R2
ip access-list extended PAT
permit ip 10.0.23.0 0.0.0.255 any
permit ip 10.0.37.0 0.0.0.255 any
permit ip 10.0.47.0 0.0.0.255 any
permit ip 10.0.24.0 0.0.0.255 any
exit
ip nat inside source list PAT interface FastEthernet0/0 overload
 Task 5: R7 loopback will be statically NAT with IP's 114.52.8.10, 114.52.8.11, 114.52.8.12,
114.52.8.13.
R2
ip nat inside source static 7.7.1.1 114.52.8.10
ip nat inside source static 7.7.2.1 114.52.8.11
ip nat inside source static 7.7.3.1 114.52.8.12
ip nat inside source static 7.7.4.1 114.52.8.13

5. Lab 20: NATing
 Task 6: R4 loopback's will be Nat. Use single ip 114.52.8.100 to accomplish this task.
R2
ip access-list extended R4loopback
permit ip 4.4.1.0 0.0.0.255 any
permit ip 4.4.2.0 0.0.0.255 any
permit ip 4.4.3.0 0.0.0.255 any
permit ip 4.4.4.0 0.0.0.255 any
exit
ip nat pool R4loop 114.52.8.100 114.52.8.100 netmask 255.255.255.0
ip nat inside source list R4loopback pool R4loop overload
 Task 7: On R1, Network 10.0.45.0, 10.0.15.0, 10.0.56.0 will be PAT.
R1
ip access-list extended PAT
permit ip 10.0.45.0 0.0.0.255 any
permit ip 10.0.15.0 0.0.0.255 any
permit ip 10.0.56.0 0.0.0.255 any
exit
ip nat inside source list PAT interface FastEthernet0/0 overload
 Task 8: R5 loopbacks will be dynamically Nating, The Range for Nating are 113.24.55.101 -
113.24.55.104.
R1
ip access-list extended R5
permit ip 5.5.1.0 0.0.0.255 any
permit ip 5.5.2.0 0.0.0.255 any
permit ip 5.5.3.0 0.0.0.255 any
permit ip 5.5.4.0 0.0.0.255 any
exit
ip nat pool R5 113.24.55.101 113.24.55.104 netmask 255.255.255.0
ip nat inside source list R5 pool R5

6. Lab 20: NATing
 Task 9: R6 loopback will be Nat. Use single ip 113.24.55.254 to accomplish this task.
R1
ip access-list extended R6
permit ip 6.6.1.0 0.0.0.255 any
permit ip 6.6.2.0 0.0.0.255 any
permit ip 6.6.3.0 0.0.0.255 any
permit ip 6.6.4.0 0.0.0.255 any
exit
ip nat pool R6 113.24.55.254 113.24.55.254 netmask 255.255.255.0
ip nat inside source list R6 pool R6 overload
 Task 10: Make sure all networks and loopbacks ping netwaxlab.com and blog.eincop.com.
On All Routers
ip domain-lookup
ip name-server 66.1.38.2