On 10/5/21 14:58, Jean St-Laurent wrote:
If your NS are in 2 separate entities, you could still resolve your MX/A/AAAA/NS. Look how Amazon is doing it. dig +short amazon.com NS ns4.p31.dynect.net. ns3.p31.dynect.net. ns1.p31.dynect.net. ns2.p31.dynect.net. pdns6.ultradns.co.uk. pdns1.ultradns.net. They use dyn DNS from Oracle and ultradns. 2 very strong network of anycast DNS servers. Amazon would have not been impacted like Facebook yesterday. Unless ultradns and Oracle have their DNS servers hosted in Amazon infra? I doubt that Oracle has dns hosted in Amazon, but it's possible. Probably the management overhead to use 2 different entities for DNS is not financially viable?
So I'm not worried about DNS stability when split across multiple physical entities.
I'm talking about the actual services being hosted on a single network that goes bye-bye like what we saw yesterday.
All the DNS resolution means diddly, even if it tells us that DNS is not the issue.
Mark.
