Often sensors come up with an alarm stating No Such Name. We have forced snmp mib ifmib persist on all our Cisco switches. The switches are not rebooted nor have any ifindexes changed after the initial auto-discovery.
When the error occurs we have to run Auto-discovery again. A new sensor comes up for the same interface with the same ifindex.
could you please advise a fix to the above mentioned issue. creating the sensor again means defining all notifications and channel details all over again. It does not work out when it happens on one of our core switches with multiple interfaces.