DHCP Relay is just a proxy that is able to receive a DHCP request and resend it to the real DHCP server.
|delay-threshold (time; Default: none)||If secs field in DHCP packet is smaller than delay-threshold, then this packet is ignored|
|dhcp-server (string; Default: )||List of DHCP servers' IP addresses which should the DHCP requests be forwarded to|
|interface (string; Default: )||Interface name the DHCP relay will be working on.|
|local-address (IP; Default: 0.0.0.0)||The unique IP address of this DHCP relay needed for DHCP server to distinguish relays. If set to 0.0.0.0 - the IP address will be chosen automatically|
|name (string; Default: )||Descriptive name for relay|
DHCP relay does not choose the particular DHCP server in the dhcp-server list, it just send the incoming request to all the listed servers.