Setup DHCP option 82 between pfSense and MS DHCP Server 2016/9

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Create the required DHCP Scope/s and Options
On the required DHCP Scope/s:
- Create a new Policy
- Name the policy
- Change the policy to "Relay Agent Information"
- Change the operator to "equals"
- Select "Agent Circuit ID:"
- Go to pfSense Interface list and select the corresponding interface name per status interfaces

  1.   - Example MGMT Interface (opt1, bge0.99)
  2.   - In this case we select bge0.99
  3.   - Convert to Hex 
  4.   - https://www.online-toolz.com/tools/text-hex-convertor.php

- Paste the resulting Hex string in "Agent Circuit ID:"
- Next select NO (not tested but I think it works that way...)
- Leave all other prompts clear/unconfigured to apply the scope options (not tested but I think it works that way...)



Setup pfSense DHCP Relay 

- You need to disable ALL DHCP Servers on pfSense!!!!
- Select Interface/s 
- Enable "If this is checked, the DHCP relay will append the circuit ID (pfSense interface number) and the agent ID to the DHCP request."
- Set DHCP Server IP Address/es




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