Instead of adding another unicast network to the mix, why wouldn't you start using an IP anycast network? DNSMadeEasy / Route53 / EasyDNS / etc..
It seems crazy to move from one service that purchases 6 name servers to another one that is only on 6 servers.... DNS Made Easy fought an attack that was over 200 Gbps a few months ago.
http://www.facebook.com/photo.php?fbid=10150668694804467&...
Can any unicast provider even really get close to fighting an attack like this?
Let's be serious at some point.... 6 servers... the MOST you can push is 6 Gbps. And most likely they are bound to about 400 Mbps of DNS traffic (based on CPU load). Unless you have hundreds of name servers and multiple locations... are you even really competing in uptime anymore?
Can any unicast provider even really get close to fighting an attack like this?
Let's be serious at some point.... 6 servers... the MOST you can push is 6 Gbps. And most likely they are bound to about 400 Mbps of DNS traffic (based on CPU load). Unless you have hundreds of name servers and multiple locations... are you even really competing in uptime anymore?