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PASSEDvendor / cisco_dna_center_assurance_alert
Cisco DNA Center Assurance Alert — Network Health Critical
Cisco DNA Center detects a widespread network health issue across 50 managed switches and 200 APs, with AI-driven assurance identifying a misconfigured QoS policy as the root cause.
Pattern
CISCO_EVENT
Severity
CRITICAL
Confidence
85%
Remediation
Remote Hands
Test Results
| Metric | Expected | Actual | Result |
|---|---|---|---|
| Pattern Recognition | CISCO_EVENT | CISCO_EVENT | |
| Severity Assessment | CRITICAL | CRITICAL | |
| Incident Correlation | Yes | 20 linked | |
| Cascade Escalation | N/A | No | |
| Remediation | — | Remote Hands — Corax contacts on-site support via call, email, or API |
Scenario Conditions
Cisco DNA Center 2.3.5 managing 50 Cat9300 switches and 200 Catalyst 9130 APs. QoS policy push via DNA Center template misconfigured DSCP markings. Voice traffic deprioritized. Campus-wide call quality issues.
Injected Error Messages (2)
cisco DNA Center assurance detecting critical network health — overall network health score dropped from 95 to 32 in last 2 hours, cisco DNA Center AI analytics identified QoS policy template error on 50 Catalyst 9300 switches, DSCP marking for voice traffic changed from EF (46) to BE (0), cisco DNA Center showing 200 client health issues and 47 application health alerts
cisco DNA Center assurance root cause analysis — cisco DNA AI network analytics traced campus-wide voice quality issues to QoS policy template pushed at 14:00, cisco DNA Center template deployment ID: tmpl-2026-0329-001 modified DSCP trust on all access switch ports, voice traffic now competing with bulk data in default queue, cisco DNA assurance recommending policy rollback, 50 switches affected
Neural Engine Root Cause Analysis
The root cause is a QoS policy template configuration error affecting 50 Catalyst 9300 switches, where DSCP marking for voice traffic was incorrectly changed from EF (46) to BE (0). This misconfiguration has caused widespread voice quality degradation, triggering 200 client health issues and 47 application health alerts, resulting in the overall network health score dropping from 95 to 32. The Cisco DNA Center appliance itself appears functional but is reporting critical network health due to this QoS policy propagation error.
Remediation Plan
1. Immediately access Cisco DNA Center GUI at https://10.50.9.100:443 to verify system accessibility. 2. Navigate to Policy > QoS and identify the corrupted QoS policy template affecting voice traffic. 3. Correct the DSCP marking for voice traffic from BE (0) back to EF (46) in the policy template. 4. Deploy the corrected QoS policy to all affected Catalyst 9300 switches through DNA Center's provisioning workflow. 5. Monitor network health score recovery and validate that client/application health alerts clear within 15-30 minutes. 6. Perform root cause analysis on why the QoS template was modified and implement change control procedures to prevent recurrence.
Tested: 2026-03-30Monitors: 2 | Incidents: 2Test ID: cmnck8zzp07nhobqeoi93e6ia