A 'no such instance' means that you're talking with an SNMP daemon, but it doesn't have the data you're asking for.
This might be for several reasons - . Maybe you have your SNMP ACLs configured to deny that OID to the connecting community? . Maybe this OID really does not exist on this device? . Maybe you have mis-typed the OID and are not asking for what you think you are asking for? 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. Steve Steve Shipway <mailto:[email protected]> [email protected] (GNU Terry Pratchett) From: mrtg [mailto:[email protected]] On Behalf Of Rick Silacci Sent: Thursday, 28 May 2015 7:37 a.m. To: [email protected] Subject: [mrtg] Able to ping but not snmpwalk 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.
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