def METHOD_NAME(self):
    packet = ptf.packet.Ether(dst=self.dut_mac)
    if self.is_dualtor:
        packet /= IPv6(src=self.server_ip, dst=self.loopback_ipv6)
    else:
        packet /= IPv6(src=self.server_ip, dst=self.relay_iface_ip)
    packet /= ptf.packet.UDP(sport=self.DHCP_SERVER_PORT,
                             dport=self.DHCP_SERVER_PORT)
    packet /= DHCP6_RelayReply(msgtype=13, linkaddr=self.vlan_ip,
                               peeraddr=self.client_link_local)
    return packet