In todays scenario, I am going to walk through some changes I made and troubleshooting steps for when I recently added a moved a old SSID/Subnet off an old legacy wireless network onto a new network same IP space and SSID that requires RADIUS authentication.
These steps can be applied to many different scenarios for troubleshooting DHCP, I just made these ones specific since it was something I recently had to troubleshoot.
Here is a basic diagram of the setup, showing all the moving parts would be overkill for the diagram. The steps on what to do and troubleshooting are below the diagram.
What you will need:
Authentication Server IP
Authentication Secret Key
DHCP Server IP
Subnet and Mask that is being moved
SSID/Subnet being moved
Work and or Troubleshooting that needs to be done:
- Add the VLAN to the switches required
- Add the virtual interface on the firewall (gateway)
- Trunk the new vlan to the switch and configure the ports
- Setup DHCP helper to point to the DHCP server
- Allow DHCP traffic from the new subnet to the DHCP server
- Configure Radius on new Network
- Configure new SSID and network settings on Wireless LAN Controller