[Network] GEN01 — Border router br1: incident resolved (SFP+ 10G replaced)

All times are shown in UTC+02:00.

Event Actions

Network Core

Start: Jul 29, 2026 at 10:55 (UTC+02:00) | End: Jul 29, 2026 at 13:57 (UTC+02:00)

Resolved

On 29 July 2026 at 10:55:04 CEST, a critical alert was raised on border router br1 at datacenter GEN01, causing network disruptions.

Our network team restored the device and manually withdrew routing through this router. Initial diagnosis: a 10G SFP+ module was (and continues) flapping UP/DOWN.

Traffic via this router has been removed from the production routing path. Services have been stable again since 11:01:59 CEST.

An engineer is on site to replace the defective SFP+. We will post further updates as work progresses.

We apologise for any inconvenience caused.

Timeline Updates:

Investigating — Critical alert on border router br1 (GEN01). Network disruptions observed. Teams are engaged.
Jul 29, 2026 at 10:55 (UTC+02:00)
Identified — Device recovered; routing via br1 disabled manually. Root cause: 10G SFP+ module flapping UP/DOWN. Traffic diverted away from this path.
Jul 29, 2026 at 10:58 (UTC+02:00)
Monitoring — Services are stable again since 11:01:59 CEST. An engineer is on site replacing the defective SFP+. We will keep you informed of progress.
Jul 29, 2026 at 11:01 (UTC+02:00)
Update — Defective SFP+ 10G module on border router br1 (GEN01) replaced on 29 July 2026 at 12:42:23 CEST; link is UP. We are now re-enabling routing instances / paths and will monitor route tables and BGP convergence closely.
Jul 29, 2026 at 12:42 (UTC+02:00)
Resolved — Defective SFP+ 10G on br1 (GEN01) was replaced at 12:42:23 CEST. Routing instances were re-enabled; all BGP sessions are Established and the network is stable. Optical link and route monitoring completed successfully. Incident closed.
Jul 29, 2026 at 13:57 (UTC+02:00)