Create the forwarding path from the client to the server.
default ip dhcp-relay fwd-path {A.B.C.D} {A.B.C.D}
default ip dhcp-relay fwd-path {A.B.C.D} {A.B.C.D} mode
ip dhcp-relay fwd-path {A.B.C.D} {A.B.C.D}
ip dhcp-relay fwd-path {A.B.C.D} {A.B.C.D} disable
ip dhcp-relay fwd-path {A.B.C.D} {A.B.C.D} enable
ip dhcp-relay fwd-path {A.B.C.D} {A.B.C.D} mode bootp
ip dhcp-relay fwd-path {A.B.C.D} {A.B.C.D} mode bootp_dhcp
ip dhcp-relay fwd-path {A.B.C.D} {A.B.C.D} mode dhcp
no ip dhcp-relay fwd-path {A.B.C.D} {A.B.C.D}
Tip
If the relay is a virtual router configured on this interface, you must set the vrid.
None
VRF Router Configuration