A district store router shows no control connections after staging, the template push failed, and the operations lead needs the fastest isolation of certificate versus reachability causes. Which show-command and Manager GUI workflow best diagnoses this join failure?
Select an answer to reveal the explanation.
Short Explanation
You'll spot the culprit quickest by checking your control connections and certificate status right on the CLI, then confirming validity in Manager. You're basically checking your passport before blaming the flight when stuck at the airport, and that validity check seals the diagnosis.
Full Explanation
The correct workflow succeeds because no control connections after staging creates ambiguity between transport reachability to controllers and trust establishment, so checking show control connections for peer state and timers alongside certificate status directly separates DTLS/TLS failures due to invalid, expired or uninstalled certificates from inability to reach the controllers, and following that with device validity verification in Manager confirms whether the chassis and serial are authorized in the trusted inventory which is prerequisite for certificate acceptance. The system-status variant fails by concept because device health and resource state cannot prove identity trust, so reachability may appear normal while an invalid certificate still blocks control, leaving the certificate half of the differential undiagnosed. The template-history variant fails by concept because it inverts cause and effect by auditing the failed push which is the consequence of missing control, not the authorization state that permits control to form, so it delays the validity check that determines certificate acceptance. The orchestrator-connections variant fails by concept because orchestrator reachability only proves initial discovery and provisioning path, not sustained control-plane adjacency to controllers where policy and templates are enforced, so success there can mask a controller-specific reachability or certificate rejection. For exam purposes remember that template push failure after staging points to control-plane join before configuration logic, and in practice always correlate CLI certificate validity dates and organization name with Manager inventory before re-attempting any template operation.