Post-Incident Review

Incident Summary

Incident ID: 537589

Incident Date & Time: March 31st, 2025 at 11:20 BST - 11:36 BST

Affected Systems/Services: UK-A Routing (Secondary)

Severity Level: Degraded

Problem

UK-based customers may have experienced a brief 30-second service interruption due to a network convergence event on our provider's network. All services were automatically re-routed via redundant links.

Timeline

Date/Time	Event Description
March 31st, 11:20 BST	Initial connectivity drop detected. Monitoring identified route availability issues across provider's uplinks.
March 31st, 11:29 BST	BGP route convergence event confirmed as services resumed within 30 seconds across the primary routing stack.
March 31st, 11:36 BST	Issue fully resolved. Traffic automatically re-routed via alternative routes with no ongoing service impact.

Root Cause Analysis

Root Cause: An issue was identified with the Lumen/CenturyLink uplinks following an unplanned 30-second connectivity drop. This triggered a network convergence event on the provider's network.

Impact Assessment

Minimal impact to service. While UK-based customers may have experienced a brief 30-second interruption, all traffic was automatically re-routed via redundant links, preventing any extended service disruption.

Corrective Actions

• Support request raised with the vendor (Lumen/CenturyLink) to investigate further

Sincerely,

Computle

We have identified an issue with the Lumen/CenturyLink uplinks. All traffic has been automatically re-routed via alternative routes and there is currently no service impact.

Initial signs point to a BGP route convergence event as all services resumed within 30 seconds across the primary routing stack.

We are monitoring route availability across our provider's uplinks following an unplanned 30-second connectivity drop to the redundant routing stack at our UK-A site. A support request has been raised with the vendor to investigate further.