Cloudflare LHR Maintenance: Nov 25, 2025

Cloudflare has announced scheduled maintenance for its London (LHR) data center on November 25, 2025. This article provides a detailed overview of the maintenance, its potential impact, and how users can stay informed.

Scheduled Maintenance Details

Cloudflare will be performing scheduled maintenance in its LHR (London) data center on November 25, 2025, between 02:00 and 06:00 UTC. This maintenance is a necessary part of ensuring the continued reliability and performance of Cloudflare's global network. During this period, network engineers will be performing essential upgrades and maintenance tasks to enhance the infrastructure. This proactive approach helps prevent potential issues and ensures the data center operates at its optimal level.

This maintenance window is crucial for Cloudflare to implement necessary upgrades and ensure the long-term stability and efficiency of its network. These scheduled downtimes allow engineers to perform critical tasks such as hardware upgrades, software updates, and network optimizations without causing unexpected disruptions. Proper maintenance is essential for preventing potential issues and maintaining the high standards of service that users expect from Cloudflare. By conducting these activities during a pre-defined window, Cloudflare minimizes the impact on its users and provides transparency about the work being done.

The scheduled maintenance window allows Cloudflare technicians to perform critical tasks such as hardware upgrades, software patching, and network configuration changes. These procedures are vital for optimizing performance, enhancing security, and ensuring the overall health of the data center. By proactively addressing potential issues, Cloudflare minimizes the risk of unexpected outages and disruptions. Scheduled maintenance also allows for the implementation of new technologies and improvements, which can lead to better service quality and enhanced user experiences. The commitment to regular upkeep ensures that Cloudflare remains at the forefront of providing robust and reliable services to its global customer base.

Potential Impact

Traffic might be re-routed from the London data center during the maintenance window. As a result, end-users in the affected region might experience a slight increase in latency. This rerouting is a standard procedure to ensure minimal disruption during maintenance, but it can temporarily affect network performance. The impact on latency is expected to be minimal, but users should be aware of the possibility. For users who are particularly sensitive to latency, it may be beneficial to plan for this maintenance window and adjust activities accordingly. Cloudflare's goal is to make these transitions as seamless as possible while ensuring the necessary maintenance is completed.

Traffic rerouting is a common strategy employed during data center maintenance to minimize service interruptions. When a data center undergoes maintenance, incoming traffic is redirected to other available data centers within the network. This failover mechanism ensures that users can continue to access services without significant disruption. However, this rerouting can sometimes result in a slight increase in latency, as data packets may need to travel longer distances to reach their destination. The extent of the latency increase depends on various factors, including network conditions and the distance to the alternative data centers. Cloudflare engineers carefully monitor network performance during these rerouting events to ensure optimal user experience.

For PNI (Private Network Interconnect) / CNI (Cloudflare Network Interconnect) customers connecting with Cloudflare in London, it's essential to ensure that they expect traffic to fail over to other locations during the maintenance window. Network interfaces in the London data center may become temporarily unavailable, and having a failover plan is crucial to maintaining service continuity. PNI and CNI connections provide direct links between customer networks and Cloudflare's network, offering enhanced performance and security. However, these connections are also subject to planned maintenance activities. By preparing for traffic failover, customers can ensure that their services remain accessible and responsive throughout the maintenance period.

How to Stay Informed

Cloudflare provides several channels for users to stay informed about scheduled maintenance and other important updates. One of the best ways to receive timely notifications is through the Cloudflare dashboard. Users can subscribe to these notifications and receive updates directly via email, PagerDuty, and webhooks, depending on their plan. This proactive approach ensures that users are always aware of any upcoming maintenance activities that may affect their services. Subscribing to notifications is a simple but effective way to stay ahead of potential disruptions and plan accordingly.

Staying informed about scheduled maintenance is crucial for minimizing disruptions and ensuring a smooth user experience. Cloudflare offers multiple channels for distributing updates, including email notifications, PagerDuty alerts, and webhooks. These methods provide flexibility in how users receive information, allowing them to choose the option that best fits their needs. By subscribing to notifications, users can receive real-time updates about maintenance schedules, potential impacts, and any changes to the planned activities. This proactive approach enables users to prepare for maintenance windows and take any necessary steps to maintain service availability. Cloudflare's commitment to transparency ensures that users have the information they need to manage their services effectively.

In addition to the Cloudflare dashboard, users can also monitor the Cloudflare Status Page for real-time updates and information about ongoing incidents and maintenance activities. The status page provides a comprehensive overview of Cloudflare's network performance and any potential issues that may be affecting users. This resource is regularly updated with the latest information, making it a valuable tool for staying informed. By checking the status page, users can quickly assess the impact of any maintenance activities and plan accordingly. Cloudflare's dedication to transparency ensures that users have access to the information they need to manage their online services effectively.

The Cloudflare Status Page provides a detailed overview of the current status of Cloudflare's network and services. It includes information about ongoing incidents, scheduled maintenance, and overall system performance. The page is updated in real-time, providing users with the most current information available. By monitoring the status page, users can quickly identify any potential issues that may be affecting their services and take appropriate action. The status page is an invaluable resource for staying informed about Cloudflare's network operations and ensuring a smooth user experience. Cloudflare's commitment to transparency and open communication is evident in its proactive approach to providing status updates to its users.

Conclusion

Cloudflare's scheduled maintenance in the LHR (London) data center on November 25, 2025, is a necessary step to ensure the continued reliability and performance of its network. While there may be a slight increase in latency for end-users in the affected region, and PNI/CNI customers should prepare for traffic failover, these measures are in place to maintain the overall quality of service. By staying informed through the Cloudflare dashboard and status page, users can effectively manage any potential impact. This proactive approach to maintenance highlights Cloudflare's commitment to providing a robust and dependable platform for its users.

To learn more about Cloudflare's services and network maintenance practices, visit the Cloudflare website.