DHCP Option 43 Configuration Examples

This section provides examples to configure DHCP Option 43 on a Linux server and on Windows Server.

Example

ISC DHCP Server configuration on Linux:

/etc/dhcp/dhcpd.conf
default-lease-time 60;
max-lease-time 7200;
option space EXTREME;
option EXTREME.cloudiq-ip code 226 = ip-address;
 
class "Edge-without-POE" {
      match if (option vendor-class-identifier = "EXTREME");
      vendor-option-space EXTREME;
      option EXTREME.cloudiq-ip 10.16.231.131;
}
  
subnet 30.30.30.0 netmask 255.255.255.0 {
        pool {
                range 30.30.30.10 30.30.30.20;
                allow members of "Edge-without-POE";
        }
        option domain-name-servers 10.1.10.1;
        option domain-name "labs.extremenetworks.com";
        option routers 30.30.30.250;
        default-lease-time 3600;
}

Example

Windows Server configuration:

Go to scope options for defined DHCP pool.
Enter the following for Option 43: e2 04 0a 10 e7 83


Value	Description
e2 04	vendor ID prefix (e2 is the hexadecimal value of the code 226 used to identify sub-option EXTREME.cloudiq-ip and 04 the hexadecimal value of the length of an IP address in bytes)
0a 10 e7 83	IP address 10.16.231.131 converted to hexadecimal