e-smith-base/root/etc/e-smith/templates/var/lib/dhclient/dhclient.conf/50hostname

{
    return unless defined $ExternalInterface;
    return unless $ExternalInterface{Name} eq $THIS_DEVICE;
    return unless $ExternalInterface{Configuration} eq "DHCPHostname";
    $OUT .= "    send host-name \"$DialupUserAccount\";\n";
    $OUT .= "    send dhcp-client-identifier \"$DialupUserAccount\";";
}