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</o:shapelayout></xml><![endif]--></head><body lang=EN-NZ link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>MRTG will measure the actual USED traffic rate (averaged over your polling frequency); and can display a percentage relative to your stated maximum.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>If you want to know the maximum CAPACITY – IE, the theoretical maximum bandwidth – then you will need another tool that basically squirts data down as fast as it possibly can and measures the rate. Note that this will of course completely saturate your link, and may cause costs if you are charged by data usage. There is some free software called Perfsonar that we use here to measure WAN connectivity which can do this amongst other things.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Steve<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Steve Shipway<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>s.shipway@auckland.ac.nz<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> mrtg-bounces+s.shipway=auckland.ac.nz@lists.oetiker.ch [mailto:mrtg-bounces+s.shipway=auckland.ac.nz@lists.oetiker.ch] <b>On Behalf Of </b>Tyler, Rodney<br><b>Sent:</b> Wednesday, 9 July 2014 9:36 a.m.<br><b>To:</b> mrtg@lists.oetiker.ch<br><b>Subject:</b> [mrtg] WAN Speed<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black'>I have setup mrtg to monitor traffic for a specific Ethernet interface on a Cisco Catalyst 6509 that connects two campuses over a fiber WAN link. The third party fiber provider says they are giving us 100Mbps across the fiber, but we need to verify what we are actually getting. I have come to realize that simply monitoring the WAN interface gives me a nice graph and actual kB/s (or MB/s) data passed, as shown below; however, the percentages are based on my Maxbytes value that is based on what the ISP says we are getting (100Mpbs or 12.5MB/s). In other words, I can change the percentages by adjusting MaxBytes. Is there any way to use mrtg to verify the available bandwidth over the WAN, or do I need a different tool?</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><table class=MsoNormalTable border=0 cellpadding=0><tr><td style='padding:.75pt .75pt .75pt .75pt'></td><td style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal align=center style='text-align:center'><b>Max<o:p></o:p></b></p></td><td style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal align=center style='text-align:center'><b>Average<o:p></o:p></b></p></td><td style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal align=center style='text-align:center'><b>Current<o:p></o:p></b></p></td></tr><tr><td style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal align=center style='text-align:center'><b>In<o:p></o:p></b></p></td><td style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal>776.4 kB/s (6.2%)<o:p></o:p></p></td><td style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal>143.6 kB/s (1.1%) <o:p></o:p></p></td><td style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal>89.3 kB/s (0.7%) <o:p></o:p></p></td></tr><tr><td style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal align=center style='text-align:center'><b>Out<o:p></o:p></b></p></td><td style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal>11.2 MB/s (89.5%) <o:p></o:p></p></td><td style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal>542.1 kB/s (4.3%) <o:p></o:p></p></td><td style='padding:.75pt .75pt .75pt .75pt'><p class=MsoNormal>819.2 kB/s (6.6%) <o:p></o:p></p></td></tr></table></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Thanks for any assistance,</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Rodney Tyler</span><o:p></o:p></p></div></div></div></body></html>