[mrtg] Able to ping but not snmpwalk

[Rick Silacci]

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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