Cisco IP Phone Option 43 Generator

Infoblox Configuration

Use the hex value above to configure DHCP Option 43 in Infoblox:

1. Log in to the Infoblox Grid Manager (NIOS)
2. Navigate to DHCP → DHCP Options (or Data Management → DHCP → Options)
3. Select or create the DHCP option set you want to modify
4. Click Add or edit Option 43
5. In the option configuration:
   • Set Option Type to "Hex" or "Binary"
   • Enter the hex value from above in the Value field
   • The format should be: XX:XX:XX:XX (with colons)
6. Click Save or Save & Close
7. Apply the option set to your network view, network, or DHCP range as needed

Important: The hex value format uses colons (:) as separators. Copy the value exactly as shown above, including the colons.

Windows DHCP Server Configuration

Configure DHCP Option 43 using the hex value above:

1. Open DHCP Manager (run dhcpmgmt.msc or search for "DHCP" in Start menu)
2. Navigate to your DHCP server → IPv4 → Server Options (for all scopes) or Scope Options (for specific scope)
3. Right-click on Server Options or Scope Options and select Configure Options
4. In the General tab, scroll down to find Option 43
5. Check the box next to Option 43
6. In the Data entry section:
   • Select Binary or Hex as the data type
   • Enter the hex value from above in space-separated format: XX XX XX XX
   • Alternatively, you can enter it as a single hex string without spaces
7. Click OK to save the configuration

Alternative Method (PowerShell):

# Convert hex string to byte array and set option
# Replace "HEX_VALUE_HERE" with the raw hex value from above (no spaces, no colons)
$hexValue = "HEX_VALUE_HERE";
$bytes = ($hexValue -split '(..)' | Where-Object { $_ }) | ForEach-Object { [Convert]::ToByte($_, 16) };
Set-DhcpServerv4OptionValue -OptionId 43 -Value $bytes

Note: Replace HEX_VALUE_HERE with the raw hex value from the "Raw Hex" tab above (no spaces, no colons).

Raw Hex Value

This is the raw hexadecimal value without any formatting. Use this for:

• Manual configuration in systems that require raw hex
• Scripts and automation tools
• Testing and validation