F5 Distributed Cloud - Service Degradation - BGP Sessions Flapping in London, Ashburn, New York & Frankfurt - INC-20260209-439

The issue with F5 Distributed Cloud that was causing BGP session flapping has been resolved, and the service is now fully operational. All other services remained fully operational throughout the incident. This incident has been marked as resolved. If you continue to experience issues, please contact the F5 Support team for assistance.

The F5 Distributed Cloud team has successfully applied the fix for this issue. Our services are operational and working as expected. We are actively monitoring the situation to ensure stability, and will provide further updates as necessary.

In the meantime, if you continue to experience any issue, please reach out to the F5 Support team for further assistance regarding the same.

Following our previous update, we would like to share the next steps toward fully restoring GRE tunnel functionality.

Our engineering teams have completed the validation and are ready to implement the fix. Based on this progress, the production deployment of the fix has been scheduled as outlined below.

Fix Deployment Window:
Start Time: 11 Feb 2026, 02:00 UTC
End Time: 11 Feb 2026, up to 08:00 UTC (timing may vary by region)

Deployment Approach:
Engineering teams will coordinate the rollout during the emergency change window. Execution has been prioritized based on non-business hours and the number of affected customers per region.

During this window, the expected impact per region may range from approximately 15 minutes up to 1 hour, depending on:

1. The number of GRE tunnel updates required
2. BGP session re-establishment following the changes

Current Impact Status:
At this time, the impact remains limited to GRE tunnels for a subset of customers. All other F5 Distributed Cloud services continue to operate normally.

Projected Impact During the Fix Roll-out:
Customers with multiple GRE tunnels are expected to maintain service continuity during the update, while customers with a single GRE tunnel may experience brief connectivity interruptions as the fix is applied and routing converges.

Contact Information:

- Email Support: support@cloud.f5.com

- Phone Support: Region-specific contact details are available at https://my.f5.com/manage/s/article/K000135931

Thank you for your continued patience and cooperation as we work to restore full service functionality.

Sincerely,
F5 Distributed Cloud

Our engineering teams have identified the root cause and are actively validating a fix ahead of a planned production rollout to restore full GRE tunnel functionality.
At this time, the impact remains limited to GRE tunnels for some customers; all other F5 Distributed Cloud services continue to operate normally.

The issue has been identified and a fix is being implemented.

The F5 Distributed Cloud Support team has identified a potential issue impacting GRE tunnels for some customers. We are actively working on resolving this matter. All other services remain fully operational. Updates will be shared as they become available.

The F5 Distributed Cloud team has identified and mitigated the impact. Our services are operational and working as expected. We are actively monitoring to ensure stability on our services, If you continue to experience any issue, please reach out to the F5 Support team for assistance.

The F5 Distributed Cloud support team has identified an issue affecting some BGP sessions in London, Ashburn, New York and Frankfurt. Our team is actively working to resolve the issue at the earliest.

We will keep you informed with updates as progress is made. Thank you for your understanding and patience as we work on addressing this issue.

This advisory is to inform you that we are currently investigating reports of service degradation affecting BGP sessions flapping on FRA and LON.

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 23:13 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.