Table of Contents
Before this article, we have talked about Static NAT configuration. Here, we will talk about another types of NAT, Dynamic NAT configuration on Packet Tracer. As in Static NAT, in the Dynamic NAT configuration, the interfaces must be identified as inside and outside again. Then we will define a Dynamic Address Pool on the NAT router. The ip address will be choosen in this pool to assign as source ip address.
We will use Dynamic NAT topology below for our Dynamic NAT Configuration example. And we will use Cisco Packet Tracer as a network simulation program.
In our Dynamic NAT configuration topology on Packet Tracer, we will have two networks again, one local and one outside network. In local network, we have three PCs and we will provide internet access to these PCs. Our Dynamic NAT configuration topology on Packet Tracer will be a small simulation of real world office Internet access.
Firstly, before Dynamic NAT configuration, we will prepare our network with our IP configurations on PCS and routers. We will provide full connectivity end to end before starting our NAT Config.
Our PCs on Packet Tracer will be configured with below IP addresses.
PC0 : 10.0.0.2 255.255.255.0 GW:10.0.0.1
PC1 : 10.0.0.3 255.255.255.0 GW:10.0.0.1
PC2 : 10.0.0.4 255.255.255.0 GW:10.0.0.1
Firstly let’s check the ping packet’s source address when we are pinging from PC 0 to Router2. As you can see below, the source address will be the PC 0 ‘s IP address. To see the packet you must enable NAT debug mode on Router2 by “debug ip nat” command.Check the below screenshots.
Now let’s do the Dynamic NAT configuration on Router1.