Juniper QFX Routing Engine State Alert

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I noted this too: Spurious failed routing engine from some JunOS devices

jnxFruSlot should be queried to get the valid slot numbers in jnxFruTable - Juniper have this documented for the MX and EX9600, and I’ve found it true for the QFX and EX’s I have (slot number is negative for invalid RE’s).

https://www.juniper.net/documentation/en_US/junos/topics/reference/general/virtual-chassis-mx-series-slot-numbers-for-snmp.html

The old code worked because it filtered out known bad entries - a missing RE will always be called “Routing Engine”, but a present one will be called “Routing Engine X”.