Troubleshooting polling issues can involve many steps and there are a few quick things we can try first before placing a support call. For example, say we have a piece of networking equipment such as a router or switch that is being monitored in Orion and suddenly the interfaces go unknown (gray) on the network device. This is telling us that SNMP information is not being recorded for the interfaces. More than likely we will not see any CPU or Memory utilization being reported either. To troubleshoot this issue we can do the following.
In summary verifying end to end connectivity between the Network Management Server and the device in question is the key and there are a few steps we can do to verify and possibly fix polling issues saving the end user some time.