Anyone want to tell Cloudflare that BGP advertisements at AWS are automated and their congested network directly cause BGP withdrawals as the automated system detected congestion and decreased traffic to remediate it?

It wouldn't surprise me if the BGP routes in the DCI PNI were manually configured, since this is probably one of the most direct and important connections. I would be surprised if Cloudflare didn't have firsthand knowledge of what happened with AWS during this incident.

I think the withdrawal approach by AWS would normally work, as this action should desaturate the connections. Just really unfortunate that this caused routing through a link that was at half capacity.

The way I read the blog post, it seems they're very aware of that.

I imagine Cloudflare and AWS were on a Chime bridge while this all went down, they both have a lot at stake here.