dhcp server (unicast replay)

Actualy i see in packet source x.x.x.x (client) -> z.z.z.z (server). replay is z.z.z.z -> y.y.y.y (relay). There is several retries from client. So i think clien't don't receive packet from relay. So if there is unicast from already configured client .. response should be sent directly back to client ignoring relay. DHCPREQUEST generated during RENEWING state: ........... This message will be unicast, so no relay agents will be involved in its transmission. Because 'giaddr' is therefore not filled in, the DHCP server will trust the value in 'ciaddr', and use it when replying to the client.