Hi, On Mon, Aug 11, 2003 at 11:59:34AM +0200, Berislav Todorovic wrote:
Renumbering Google means a change of an A (or CNAME) record. And people can still use Altavista or Lycos, so no big deal.
If one DNS server for a ccTLD goes down, there are lots of secondaries that queries can go to. A normal end user won't even notice. If the primary goes down and needs to change IPs, that's primarily a non-user-visible change in the configuration of the secondary name servers.
Renumbering a ccTLD DNS is painful - even a secondary one. Not to mention what happens to the primary, if the operator providing connectivity to the registry bankrupts. Remember the ns.EU.net case?
Distribute your secondary name servers well, and a single nameserver going down won't do that much hurt. Of course procedures should be into place to change the glue records quickly (in the range of "hours", instead of "months").
And what about public exchange points?
In which way are ccTLDs related to public exchange points? Or are you referring to the discussed "abandon PI" policy change? Gert Doering -- NetMaster -- Total number of prefixes smaller than registry allocations: 56535 (56318) SpaceNet AG Mail: netmaster@Space.Net Joseph-Dollinger-Bogen 14 Tel : +49-89-32356-0 80807 Muenchen Fax : +49-89-32356-299