Hi everyone,
I always appreciate the support of Cisco community.
We need to connect the networks with the same network address to L3 switch (Catalyst 9300) to communicate with the destination server. Also, the communication between Network A and B must be prohibited.
We thought that it would be possible to implement by utilizing the NAT and VRF of C9300. I would like to tell you how to configure network.
First, Network A is connected to the Port 1, and Network B is connected to the Port 3. Then, we try to change the IP address of Network A as shown in the table below by means of NAT.
| No. | Inside | Outside |
| 1 | 192.168.1.5 | 192.168.3.5 |
| 2 | 192.168.1.6 | 192.168.3.6 |
| 3 | 192.168.1.7 | 192.168.3.7 |
| 4 | 192.168.1.8 | 192.168.3.8 |
Next, we build connection between Port 2 and 4, and configure VRF as below to prevent communication between Network A and Network B.
- VRF 1 Routing Table
| Network number | Outbound Interface | Next hop |
| 192.168.3.0/24 | Fa0/4 | 10.10.0.5 |
- VRF 2 Routing Table
| Network number | Outbound Interface | Next hop |
| 192.168.1.0/24 | Fa0/3 | 10.10.0.5 |
The detailed connection is shown in the picture below.
Like this, I wonder if there is any problem with configuring the network I said.
The answers from experts would be very helpful for me. Thank you very much indeed!
