Reachability of Windows Host is showing as 0% in snmpcollector probe

Document ID : KB000007052
Last Modified Date : 14/02/2018
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When you applied Default Template to Windows Host, you are getting the below incorrect alert.


QOS_REACHABILITY_REACHABILITY = 0.0 from source XXX targeting Reachability has crossed the critical static threshold of < 100.0


QoS value of Reachability metrics for Windows Host is showing as 0% while server is online and responding.

snmpcollector probe ANY VERSIONWindows Host device (SNMP service enabled) is being monitored as SNMP device.SNMP V2 is selected for the Windows Host.

snmpcollector probe uses 20 oids in a snmp bulk request for device that you select SNMP V2,

but SNMP service in Windows Host is unable to respond to the bulk request.


Change SNMP version from V2 to V1 for Windows Host.



MAX_BATCH (default 20) parameter controls how many oids is included in a snmp bulk request in snmpcollector probe.

This problem may also be solved with lower number of MAX_BATCH.

However lowering this parameter should only be done very carefully, because it may slow the entire polling performance down in snmpcollector probe.

Additional Information:

See also the related KB.

TEC1249579 - snmpcollector CPU metric family discovery on Cisco 3850 devices (and potentially others)
TEC1024587 - snmpcollector MAX_BATCH setting