vSphere Alarm Notifications Fire During Maintenance Mode Despite Suppressed Actions

Question

A vSphere alarm is configured with an automated action but notifications disabled. The goal is to determine whether email, SNMP, or syslog notifications can still fire when the host or cluster enters maintenance mode, depending on the installed vSphere major version.

Alarm actions and notification channels are separate settings, so suppressing the action should not automatically suppress the notification. Version-specific behavior around maintenance mode and alarm state inheritance remains uncertain without checking the current release documentation.

Does vSphere continue to send alarm notifications during maintenance mode when the alarm action is suppressed? Are notification suppression rules scoped to a datacenter or cluster sufficient to prevent unexpected alerts? Which vSphere versions separate maintenance mode behavior from alarm notification delivery?

Tasadduq Burney · Answer

AnswervSphere does not automatically suppress email, SNMP, or syslog notifications when the alarm action is disabled, even while the host or cluster is in maintenance mode.Confirmed facts: The alarm’s Enabled flag and each notification channel’s Enabled flag determine delivery; maintenance mode status alone does not stop alarms from firing unless the specific version adds a suppression rule.Steps needed: 1. Verify the alarm’s Enabled flag and that the Automated Action is truly suppressed. 2. Check that the notification channel (email, SNMP, syslog) is disabled. 3. Confirm the host or cluster’s maintenance mode status via the vSphere Client or API. 4. Review the release notes for your vSphere version to see if maintenance‑mode notification suppression was introduced.Please provide the vSphere major version (e.g., 6.5, 7.0, 8.0) to refine the recommendation.

vSphere Alarm Notifications Fire During Maintenance Mode Despite Suppressed Actions

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