China Mobile China Mobile Infosys Technologies Infosys Technologies RFC 3046 allows only the first Relay Agent to append Relay Agent Information option. In some networks, Layer 2 Relay Agents and Layer 3 Relay Agents are deployed but only Layer 2 Relay Agent appends the Relay Agent Information option. This document describes two pretty common network scenarios that uses Layer 2 and Layer 3 Relay Agents and their unique requirements where either DHCP server or Relay Agent need more information to handle DHCP messages.