How to Configure Options 43 and 60 in DHCP on Cisco 3850

ip dhcp pool test-pool
network 192.168.21.0 255.255.255.0
dns-server 8.8.8.8
domain-name test.local
default-route 192.168.21.1
option 60 ascii "VCI string"
option 43 hex string

(string = f1 + (number of controllers*4) + (hex value of ip addresses))
For instance, if you had 2 controllers with 192.168.20.10 and 192.168.20.11:

string = F1 + (2*4) + C0A8140A + C0A8140B = F108C0A8140AC0A8140B

ip dhcp excluded-address 192.168.21.1 192.168.21.100