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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'>Looking at your SNMP dump, it seems that the HC interface tree has a different ifName for the ports than the normal interface tree…<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'>This is a subset of the HC tree, showing ifName, ifHCInOctets, ifHighSpeed, ifAlias:<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'>iso.3.6.1.2.1.31.1.1.1.1.4 = STRING: "X1"<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>iso.3.6.1.2.1.31.1.1.1.6.4 = Counter64: 4189744484948<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>iso.3.6.1.2.1.31.1.1.1.15.4 = Gauge32: 1000<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>iso.3.6.1.2.1.31.1.1.1.18.4 = ""<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'>and the normal tree showing ifDescr, ifSpeed and ifInOctets:<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'>iso.3.6.1.2.1.2.2.1.2.4 = STRING: "X1 (WAN)"<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>iso.3.6.1.2.1.2.2.1.5.4 = Gauge32: 1000000000<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>iso.3.6.1.2.1.2.2.1.10.4 = Counter32: 2150745330<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'>From this, we see the (a) we must use SNMPv2 and the HC counters, and (b) the HC name can be just “X1”.<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>Target[192.168.30.1_X1]: #X1:angrybird@192.168.30.1:::::2<o:p></o:p></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'>So, this sets SNMPv2 (the :::::2 on the end) and (as we’re using HC) should identify the interface as X1 by ifName. However, if that fails, then this should always work, as it uses ifNum:<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>Target[192.168.30.1_X1]: 4:angrybird@192.168.30.1:::::2<o:p></o:p></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 get an error from this, then it might be that the walking of the interface tree is somehow failing to build up the mapping table. If you cfg file is called “<b>foo.cfg</b>” then look for a “<b>foo.ok</b>” in the same directory; delete it if it exists, and make sure it (and the directory) and writeable by the MRTG process so that it can be recreated. Having an incorrect or empty .ok file that is not writeable can break the name to number mapping.<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>Target[192.168.30.1_X1]: 1.3.6.1.2.1.2.2.1.10.4&1.3.6.1.2.1.2.2.1.16.4:angrybird@192.168.30.1:::::2<o:p></o:p></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'>So, this uses the explicit OIDs, but they are the normal not the HC ones. You should instead use:<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>Target[192.168.30.1_X1]: 1.3.6.1.2.1.31.1.1.1.6.4&1.3.6.1.2.1.31.1.1.1.10.4:angrybird@192.168.30.1:::::2<o:p></o:p></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'>Now, this uses explicit OIDs, SNMPv2, and the HC counters, so that it can handle >100Mbps. The first two examples above should have the same effect, unless you have set the ‘<b>noHC[_]:yes</b>’ option (if you HAVE set this, remove it now!)<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'>So, if all you get are zeroes, then there are a couple of possibilities. Firstly, there may be no traffic on the interface, so zero is correct. Secondly, that you have the <b>MaxBytes[]</b> set too low and the calculated traffic is being rejected as invalid. Make sure <b>MaxBytes[]</b> is set to the correct maximum octets-per-second of this interface – 128000 for a 1Mbps link, and so on.<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'>You can run MRTG interactively with the debugging enabled ( --debug=base,tarp,snpo,log,eval ) to get more details as to the data retrieved and stored, to see what you’re doing.<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><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><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>