Multiple products in us-central1-b are experiencing network service degradation.

Google Cloud impact

Impact

Multiple products in us-central1-b are experiencing network service degradation.

Affected product

Affected regions

Timeline

Updates newest first (times in UTC).

1. MonitoringSep 10, 2026, 9:20 PM UTC

   ## Incident Report ## Summary On Tuesday, 1 September 2026, some customers in us-central1 experienced network service degradation and instance isolation for a duration of 4 hours and 11 minutes. To our customers whose businesses were impacted during this disruption, we sincerely apologize. This is not the level of quality and reliability we strive to offer you, and we are taking immediate steps to improve the platform’s performance and availability. ## Root Cause The event was triggered by the inadvertent physical disconnection of network fiber-optic cables during routine hardware maintenance.

2. MonitoringSep 3, 2026, 5:47 PM UTC

   ## Preliminary Incident Report We sincerely apologize for the disruption this incident caused to your business. We know how much you rely on Google Cloud, and we regret the impact on your environment. We are working to address the root cause and prevent this from occurring in the future. Please note, this information is based on our best knowledge at the time of posting and is subject to change as our investigation continues. A final Incident Report with preventative actions will be posted once our investigation is complete. If you have experienced impact outside of what is listed below, pleas

3. MonitoringSep 1, 2026, 7:12 PM UTC

   **Summary** Multiple products in us-central1-b experienced network service degradation. **Description** The issue was affecting a portion of the us-central1-b zone. The remaining zones in the region were unaffected. All the impacted products have recovered. From preliminary analysis, routine network fabric path maintenance triggered unexpected issues in one cluster in us-central1-b. We have recovered the network capacity that was impacted and restored all zonal and regional services. Maintenance in the region has been halted while proactive audits are carried out. We thank you for your patienc

4. MonitoringSep 1, 2026, 6:36 PM UTC

   **Summary** Multiple products in us-central1-b are experiencing network service degradation. **Description** The issue is affecting a portion of the us-central1-b zone. The remaining zones in the region are unaffected. Most of the products have recovered. The impacted products Cloud Run and App Engine are also seeing recovery and the errors have lowered pre-incident levels. Engineering continues to monitor and validate. Routine network fabric path maintenance triggered unexpected issues in two clusters in us-central1-b. We have recovered the network capacity that was impacted and restored all

5. MonitoringSep 1, 2026, 6:01 PM UTC

   **Summary** Multiple products in us-central1-b are experiencing network service degradation. **Description** The issue is affecting a portion of the us-central1-b zone. The remaining zones in the region are unaffected. Most of the products have recovered and the engineering team is still validating a few remaining product impacts. Routine network maintenance triggered issues in us-central1-b. We have recovered the network capacity that was impacted and restored all zonal and regional services. Maintenance in the region has been halted while proactive audits are carried out. We will provide mor

6. MonitoringSep 1, 2026, 5:09 PM UTC

   **Summary** Multiple products in us-central1-b are experiencing network service degradation. **Description** The issue is affecting a portion of the us-central1-b zone. The remaining zones in the region are unaffected. Most of the products have recovered and the engineering team is still validating a few remaining product impacts. We will provide more information by Tuesday, 2026-09-01 11:00 US/Pacific with current details. **Customer Symptoms** Customers are experiencing elevated packet loss and errors. * Cloud Run * App Engine Following products have recovered * BigQuery * Cloud Dataflow * C

7. MonitoringSep 1, 2026, 4:19 PM UTC

   **Summary** Multiple products in us-central1-b are experiencing network service degradation. **Description** The issue is affecting a portion of the us-central1-b zone. The remaining zones in the region are unaffected. Following network-level mitigation efforts, the underlying network infrastructure has fully recovered. Product engineering teams across Cloud are currently validating the recovery status of individual services. We will provide more information by Tuesday, 2026-09-01 10:00 US/Pacific with current details. **Customer Symptoms** Customers are experiencing elevated packet loss and e

8. MonitoringSep 1, 2026, 4:03 PM UTC

   **Summary** Multiple products in us-central1-b are experiencing network service degradation. **Description** We are experiencing a networking issue starting Tuesday, 2026-09-01 07:41 US/Pacific. The issue is affecting a portion of the us-central1-b zone. The remaining zones in the region are unaffected. Our network engineering team has put in mitigations and we are seeing services starting to recover. We will provide more information by Tuesday, 2026-09-01 09:30 US/Pacific with current details. We apologize to all who are affected by the disruption. **Customer Symptoms** Customers are experien

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