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Critical Resource Monitoring (CRM)

You can configure Juniper Mist Edge to monitor the health of the upstream resources. This configuration helps determine the reachability of those resources from the Juniper Mist Edge data ports. If the health check of the upstream resource fails, the Juniper Mist Edge prompts the APs to failover to the next member and shuts down the tunnel terminator service temporarily. The shutdown continues until the upstream resources are healthy and reachable again.

You can configure the upstream resource monitoring on the Mist Cluster page. The option is disabled by default. Protocols to monitor a resource include ARP, PING, and TCP. You can configure multiple resources using different protocols to monitor the health check. Even if one of the health checks fails, the Juniper Mist Edge prompts the APs to failover to another edge. Commonly used health checks are ARPing or PINGing the default gateways.