F5 Distributed Cloud - Service Degradation - DNS resolution failures for CDN domain - INC-20260327-448

Update timeline

1. investigating Mar 27, 2026, 11:00 PM UTC

   This advisory is to inform you that we are currently investigating reports of service degradation affecting DNS resolution in multiple regions. We understand this may be affecting your operations and we are committed to providing transparent and timely updates as more information becomes available. While we gather more information, we recommend monitoring the progress on this site (https://www.f5cloudstatus.com/) for the latest update. Investigation Status: • We have identified potential service impact at 03/27/2026, 21:59 UTC; • Our incident response team has been fully mobilized; • Initial investigation and impact assessment efforts are underway. Next Steps: • A detailed incident notification will be provided within 30 minutes; • Our teams are working to determine the root cause of the incident; • We will share mitigation steps as soon as they become available. We appreciate your patience as we work to resolve this situation. If you are experiencing a critical business impact, please contact our support team through your established channels. Thank you for your continued support and trust in F5.

2. investigating Mar 27, 2026, 11:45 PM UTC

   We are currently investigating an intermittent DNS resolution failures for CDN domain in the U.S. region. Some customers may experience occasional failures when attempting to reach certain endpoints or services that rely on DNS lookups. Our engineering team is actively working to identify the root cause and restore full stability. At this time, the impact appears to be localized to the US region, and all other regions are operating normally. We will provide updates here as more information becomes available. Thank you for your patience and understanding.

3. monitoring Mar 28, 2026, 12:31 AM UTC

   The intermittent DNS resolution failures affecting the CDN domain in the U.S. region have been successfully resolved. All impacted services are now operating normally. Our engineering team has completed the required remediation steps, and no further disruptions are expected. We will continue to closely monitor system performance to ensure ongoing stability. Should you encounter any related issues, please contact our support team for further assistance. Thank you for your patience while we worked to restore full service.

4. resolved Mar 28, 2026, 04:08 AM UTC

   The intermittent DNS resolution failures affecting the CDN domain in the U.S. region have now been fully resolved. All impacted services are operating normally. Our engineering team has completed the necessary remediation steps, and we do not anticipate any further disruption. If you experience any related issues, please reach out to our support team for assistance. Thank you for your patience and understanding while we worked to restore full service.