With Facebook down, some large DNS servers seem to be struggling with the extra load of failing requests to look up "facebook.com". Cloudflare reports overload with their DNS server at 1.1.1.1, although that's working for me.
Billions of things worldwide are trying to connect to Facebook. The lookup which normally returns the IP address for facebook.com on the first try now requires trying a.ns.facebook.com, b.ns.facebook.com, etc. several times each before giving up. Probably several times a minute for everyone who has a Facebook app in their phone turned on. That may be using a big fraction of world DNS resources.
Vodaphone Ireland seems to be struggling with a DNS overload right now, per the Irish Independent. Also, their status page can't find "Dublin" as a city.
With Facebook down, some large DNS servers seem to be struggling with the extra load of failing requests to look up "facebook.com". Cloudflare reports overload with their DNS server at 1.1.1.1, although that's working for me.
Billions of things worldwide are trying to connect to Facebook. The lookup which normally returns the IP address for facebook.com on the first try now requires trying a.ns.facebook.com, b.ns.facebook.com, etc. several times each before giving up. Probably several times a minute for everyone who has a Facebook app in their phone turned on. That may be using a big fraction of world DNS resources.
Vodaphone Ireland seems to be struggling with a DNS overload right now, per the Irish Independent. Also, their status page can't find "Dublin" as a city.