We are upgrading some software components of our virtualization environment in order to improve its stability and reliability.

No service disruptions are expected and there will be no downtime of the virtual servers or platform services.

Maintenance work will only be performed during the night, the planned time windows are listed below.

• 09.02.2026 (23:00 - 06:00): NTT ES34 (part 1/4)
• 10.02.2026 (23:00 - 06:00): NTT ES34 (part 2/4)
• 11.02.2026 (23:00 - 06:00): NTT ES34 (part 3/4)
• 12.02.2026 (23:00 - 06:00): NTT ES34 (part 4/4)

We are upgrading some software components of our virtualization environment in order to improve its stability and reliability.

No service disruptions are expected and there will be no downtime of the virtual servers or platform services.

Maintenance work will only be performed during the night, the planned time windows are listed below.

• 23.02.2026 (23:00 - 06:00): Colozüri CZ41 (part 1/4)
• 24.02.2026 (23:00 - 06:00): Colozüri CZ41 (part 2/4)
• 25.02.2026 (23:00 - 06:00): Colozüri CZ41 (part 3/4)
• 26.02.2026 (23:00 - 06:00): Colozüri CZ41 (part 4/4)

We will perform a software upgrade on the NKE files service (NFS server) on the ES34 cluster, this affects the Read Write Many (RWX) storage.

Due to restarts of the services, connection interruptions and momentary service disruptions are to be expected. Everything should recover automatically once the services are running again.

We will perform a software upgrade on our S3 storage systems in both datacenter locations.

Connection interruptions and momentary service disruptions are to be expected during the maintenance window.

We are currently investigating why route updates in our BGP Core Network are not processed correctly in the locations CZ41 and ES34.

After a fade out of the BGP sessions in ES34 the situation in ES34 stabilized. After enabling a few sessions again, routing update processing is stuck again. We will fade out all traffic on this router to prepare for an emergency reboot.

The reboot did not fix the issue. We disabled now affected IPv4 BGP Upstream Transits. Currently the situation is stable and traffic is flowing through other Transits. We currently collect information for a case with the vendor.

We've now resolved the incident together with our vendors TAC. Thanks for your patience.

We have identified a potential issue impacting applications deployed via Dockerfile builds, which may prevent them from starting correctly. Our team is actively working on a resolution. Further updates will follow.

The root cause of the issue has been identified and a fix has been applied. All affected systems are now back up and running normally. We've now resolved the incident. Thanks for your patience.

We are currently investigating issues with our core router in ColoZüri 4.1 (cz41-c-r1). It appears that IPv6 connectivity is primarily affected. We are actively investigating the issue.

A reboot of the core router resolved the issue. We are now investigating the root cause.

The system is currently stable. We will continue investigating the root cause during the day.