diff --git a/html/includes/graphs/device/bits.inc.php b/html/includes/graphs/device/bits.inc.php
index b843760ff..27c662cf7 100644
--- a/html/includes/graphs/device/bits.inc.php
+++ b/html/includes/graphs/device/bits.inc.php
@@ -2,6 +2,9 @@
 
 ## Generate a list of ports and then call the multi_bits grapher to generate from the list
 
+$ds_in  = "INOCTETS";
+$ds_out = "OUTOCTETS";
+
 $device = device_by_id_cache($id);
 
 foreach (dbFetchRows("SELECT * FROM `ports` WHERE `device_id` = ?", array($id)) as $port)
@@ -64,7 +67,8 @@ $colour_line_out = "000099";
 $colour_area_in = "91B13C";
 $colour_area_out = "8080BD";
 
+include("includes/graphs/generic_multi_seperated.inc.php");
 #include("includes/graphs/generic_multi_bits_separated.inc.php");
-include("includes/graphs/generic_multi_data.inc.php");
+#include("includes/graphs/generic_multi_data.inc.php");
 
 ?>
diff --git a/html/includes/graphs/generic_multi_seperated.inc.php b/html/includes/graphs/generic_multi_seperated.inc.php
index d25b0f083..1a450ba83 100644
--- a/html/includes/graphs/generic_multi_seperated.inc.php
+++ b/html/includes/graphs/generic_multi_seperated.inc.php
@@ -4,6 +4,15 @@ include("includes/graphs/common.inc.php");
 
 $units_descr = substr(str_pad($units_descr, 18),0,18);
 
+if($format == "octets" || $format == "bytes")
+{
+  $units = "Bps";
+  $format = "octets";
+} else {
+  $units = "bps";
+  $format = "bits";
+}
+
 $i = 0;
 $rrd_options .= " COMMENT:'$units_descr Current  Average  Maximum\\n'";
 if (!$nototal) { $rrd_options .= " COMMENT:' Tot'"; }
@@ -25,6 +34,20 @@ foreach ($rrd_list as $rrd)
   $rrd_options .= " CDEF:outB".$i."=out".$i.",$multiplier,*";
   $rrd_options .= " CDEF:outB".$i."_neg=outB".$i.",-1,*";
   $rrd_options .= " CDEF:octets".$i."=inB".$i.",outB".$i.",+";
+
+  if($_GET['previous'])
+  {
+    $rrd_options .= " DEF:".$in."octets" . $i . "X=".$rrd['filename'].":".$ds_in.":AVERAGE:start=".$prev_from.":end=".$from;
+    $rrd_options .= " DEF:".$out."octets" . $i . "X=".$rrd['filename'].":".$ds_out.":AVERAGE:start=".$prev_from.":end=".$from;
+    $rrd_options .= " SHIFT:".$in."octets" . $i . "X:$period";
+    $rrd_options .= " SHIFT:".$out."octets" . $i . "X:$period";
+    $in_thingX .= $seperatorX . "inoctets" . $i . "X,UN,0," . "inoctets" . $i . "X,IF";
+    $out_thingX .= $seperatorX . "outoctets" . $i . "X,UN,0," . "outoctets" . $i . "X,IF";
+    $plusesX .= $plusX;
+    $seperatorX = ",";
+    $plusX = ",+";
+  }
+
   if (!$args['nototal'])
   {
     $rrd_options .= " VDEF:totin".$i."=inB".$i.",TOTAL";
@@ -54,6 +77,28 @@ foreach ($rrd_list as $rrd)
   $i++; $iter++;
 }
 
+  if($_GET['previous'] == "yes")
+  {
+    $rrd_options .= " CDEF:".$in."octetsX=" . $in_thingX . $plusesX;
+    $rrd_options .= " CDEF:".$out."octetsX=" . $out_thingX . $plusesX;
+    $rrd_options .= " CDEF:doutoctetsX=outoctetsX,-1,*";
+    $rrd_options .= " CDEF:inbitsX=inoctetsX,8,*";
+    $rrd_options .= " CDEF:outbitsX=outoctetsX,8,*";
+    $rrd_options .= " CDEF:doutbitsX=doutoctetsX,8,*";
+    $rrd_options .= " VDEF:95thinX=inbitsX,95,PERCENT";
+    $rrd_options .= " VDEF:95thoutX=outbitsX,95,PERCENT";
+    $rrd_options .= " VDEF:d95thoutX=doutbitsX,5,PERCENT";
+  }
+
+  if($_GET['previous'] == "yes")
+  {
+    $rrd_options .= " AREA:in".$format."X#99999999:";
+    $rrd_options .= " AREA:dout".$format."X#99999999:";
+    $rrd_options .= " LINE1.25:in".$format."X#666666:";
+    $rrd_options .= " LINE1.25:dout".$format."X#666666:";
+  }
+
+
 $rrd_options .= $rrd_optionsb;
 $rrd_options .= " HRULE:0#999999";
 
diff --git a/html/includes/graphs/generic_multi_simplex_seperated.inc.php b/html/includes/graphs/generic_multi_simplex_seperated.inc.php
index e3d4d158f..04b535915 100644
--- a/html/includes/graphs/generic_multi_simplex_seperated.inc.php
+++ b/html/includes/graphs/generic_multi_simplex_seperated.inc.php
@@ -52,6 +52,16 @@ foreach ($rrd_list as $i => $rrd)
     $rrd_options .= " DEF:".$rrd['ds'].$i."max=".$rrd['filename'].":".$rrd['ds'].":MAX ";
   }
 
+  if($_GET['previous'])
+  {
+    $rrd_options .= " DEF:".$i . "X=".$rrd['filename'].":".$rrd['ds'].":AVERAGE:start=".$prev_from.":end=".$from;
+    $rrd_options .= " SHIFT:".$i . "X:$period";
+    $thingX .= $seperatorX . $i . "X,UN,0," . $i . "X,IF";
+    $plusesX .= $plusX;
+    $seperatorX = ",";
+    $plusX = ",+";
+  }
+
   ## Suppress totalling?
   if (!$nototal)
   {
@@ -60,7 +70,6 @@ foreach ($rrd_list as $i => $rrd)
 
   ## This this not the first entry?
   if ($i) { $stack="STACK"; }
-
   # if we've been passed a multiplier we must make a CDEF based on it!
   $g_defname = $rrd['ds'];
   if (is_numeric($multiplier))
@@ -79,6 +88,8 @@ foreach ($rrd_list as $i => $rrd)
     $rrd_options .= " CDEF:" . $g_defname . $i . "max=" . $rrd['ds'] . $i . "max," . $divider . ",/";
   }
 
+
+
   ## Are our text values related to te multiplier/divisor or not?
   if (isset($text_orig) && $text_orig)
   {
@@ -97,4 +108,25 @@ foreach ($rrd_list as $i => $rrd)
   $rrd_options .= " COMMENT:'\\n'";
 }
 
+  if($_GET['previous'] == "yes")
+  {
+    if (is_numeric($multiplier))
+    {
+      $rrd_options .= " CDEF:X=" . $thingX . $plusesX.",".$multiplier. ",*";
+    } elseif (is_numeric($divider))
+    {
+      $rrd_options .= " CDEF:X=" . $thingX . $plusesX.",".$divider. ",/";
+    } else 
+    {
+      $rrd_options .= " CDEF:X=" . $thingX . $plusesX;
+    }
+
+    $rrd_options .= " AREA:X#99999999:";
+    $rrd_options .= " LINE1.25:X#666666:";
+
+
+  }
+
+
+
 ?>