Error alert "system health check failures were found" in Controller

[KaungKyaw]

My nimble storage model CS1000 Controller B has prompt alert "system health check failures were found. Resolve failures before attempting failover." and this say "Array Nimble01: Degraded network detected.". I already investigated at switch level, cable, module as potential components and still haven't idea. How do i need to do and How can i lucky?

[Thomas_Lam_HK]

It should be ARP resolve issue between Interface Pair (e.g. Ctrlr_A_Eth1 to Ctrlr_B_Eth1), quite typical...

In order to pass the network check, both Interface pair in each controller need to be comunicate via ARP request (just ensure both ports connected in same switch or VLAN) in order to allows failover happens,  please check those or simply reach out to Nimble Support and they can help review the logs for you.