Datasheet

Lab – Configuring Port Address Translation (PAT)

Step 5: Configure static routing.

a. Create a static route from the ISP router to the Gateway router.

ISP(config)# ip route 209.165.200.224 255.255.255.248 209.165.201.18

b. Create a default route from the Gateway router to the ISP router.

Gateway(config)# ip route 0.0.0.0 0.0.0.0 209.165.201.17

Step 6: Verify network connectivity.

a. From the PC hosts, ping the G0/1 interface on the Gateway router. Troubleshoot if the pings are

unsuccessful.

b. Verify that the static routes are configured correctly on both routers.

Part 2: Configure and Verify NAT Pool Overload

In Part 2, you will configure the Gateway router to translate the IP addresses from the 192.168.1.0/24 network

to one of the six usable addresses in the 209.165.200.224/29 range.

Step 1: Define an access control list that matches the LAN private IP addresses.

ACL 1 is used to allow the 192.168.1.0/24 network to be translated.

Gateway(config)# access-list 1 permit 192.168.1.0 0.0.0.255

Step 2: Define the pool of usable public IP addresses.

Gateway(config)# ip nat pool public_access 209.165.200.225 209.165.200.230

netmask 255.255.255.248

Step 3: Define the NAT from the inside source list to the outside pool.

Gateway(config)# ip nat inside source list 1 pool public_access overload

Step 4: Specify the interfaces.

Issue the ip nat inside and ip nat outside commands to the interfaces.

Gateway(config)# interface g0/1

Gateway(config-if)# ip nat inside

Gateway(config-if)# interface s0/0/1

Gateway(config-if)# ip nat outside

Step 5: Verify the NAT pool overload configuration.

a. From each PC host, ping the 192.31.7.1 address on the ISP router.

b. Display NAT statistics on the Gateway router.

Gateway# show ip nat statistics

Total active translations: 3 (0 static, 3 dynamic; 3 extended)

Peak translations: 3, occurred 00:00:25 ago

Outside interfaces:

Serial0/0/1

Inside interfaces:

GigabitEthernet0/1