Cloudflare’s perspective of the October 30, 2024, OVHcloud outage

This post details Cloudflare's observation and analysis of the OVHcloud outage on October 30, 2024. It includes traffic graphs showing the impact on Cloudflare's origin traffic, analysis of BGP routing shifts, and the discovery of evidence pointing to a BGP route leak from Worldstream (AS49981) impacting OVHcloud. It also highlights Cloudflare's own protective measures, such as max prefix-limits, which prevented the route leak from affecting Cloudflare's network.