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</o:shapelayout></xml><![endif]--></head><body lang=EN-NZ link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>A ‘no such instance’ means that you’re talking with an SNMP daemon, but it doesn’t have the data you’re asking for.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>This might be for several reasons –<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>         </span></span></span><![endif]><span style='color:#1F497D'>Maybe you have your SNMP ACLs configured to deny that OID to the connecting community?<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>         </span></span></span><![endif]><span style='color:#1F497D'>Maybe this OID really does not exist on this device?<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span style='font-family:Symbol;color:#1F497D'><span style='mso-list:Ignore'>·<span style='font:7.0pt "Times New Roman"'>         </span></span></span><![endif]><span style='color:#1F497D'>Maybe you have mis-typed the OID and are not asking for what you think you are asking for?<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Of course a ping will work, as that is just and ICMP echo request, and you know that the host is up (since you’re getting a sane response back from the SNMP daemon).  ‘ping’ checks an ICMP response at the Transport layer.  ‘snmpwalk’ queries the SNMP daemon at Application level.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Steve<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><b><span style='color:#1F497D'>Steve Shipway<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'><a href="mailto:s.shipway@auckland.ac.nz"><span style='color:blue'>s.shipway@auckland.ac.nz</span></a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:1.0pt;color:#1F497D'>(GNU Terry Pratchett)<o:p></o:p></span></p></div><p class=MsoNormal><span style='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 [mailto:mrtg-bounces+s.shipway=auckland.ac.nz@lists.oetiker.ch] <b>On Behalf Of </b>Rick Silacci<br><b>Sent:</b> Thursday, 28 May 2015 7:37 a.m.<br><b>To:</b> mrtg@lists.oetiker.ch<br><b>Subject:</b> [mrtg] Able to ping but not snmpwalk<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I’m monitoring 5080 devices for latency.  I noticed some of the graphs are blank.  I did an snmpwalk on the IP’s with the blank graphs and I get “No such instance currently exists at this OID”, which would explain the blank graphs.  The part I can’t figure out is that when I ping that same IP I get  a response.<o:p></o:p></span></b></p><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></b></p></div></div></body></html>