LACP partner lost
Bond MII layer reports up but the LACP partner is unsynchronized. The bond appears functional while traffic is dropped by the switch. Also emits a warning when the active aggregator has fewer ports than configured (redundancy reduced).
Remediation
When this rule fires on one of your servers, the dashboard alert detail page renders the full remediation guidance: the command to run, what to verify after, and Furnace's annotation for your specific distro + hardware. Sign in at app.glassmkr.com to see the live alert.