DHCP option 43 requests specific vendor options from the DHCP server. Only sub-option 226 (EXTREME.cloudiq-ip) is supported to change the value of the ExtremeCloud IQ server IP address on the switch.
With the support of DHCP option 43, DHCP can dynamically configure the IP address of a private/non-public ExtremeCloud IQ server for zero touch deployments when the default ExtremeCloud IQ server (hac.extremecloudiq.com) is not desired.
For information about configuring the switch to support ExtremeCloud IQ, see ExtremeCloud IQ Support.