[dns-wg] Fwd: [enum-wg] Tier-2 provisioning: NS vs CNAME/DNAME
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Niall O'Reilly
Niall.oReilly at ucd.ie
Wed Jul 7 18:29:06 CEST 2004
Hello, I wouldn't cross-post, but there seems to be nobody home over on the enum-wg list, and it is related to DNS ... /Niall Begin forwarded message: > From: Niall O'Reilly <niall.oreilly at ucd.ie> > Date: 7 July 2004 10:48:56 IST > To: enum-wg at ripe.net > Cc: Niall O'Reilly <niall.oreilly at ucd.ie> > Subject: [enum-wg] Tier-2 provisioning: NS vs CNAME/DNAME > > Hello ENUMmers, > > I'm about to become responsible for a Tier-2 ENUM registry, part of > the Irish ENUM > Trial. I expect to use BIND as the name server platform for this > purpose. I have > supposed (perhaps naïvely) that the conventional delegation mechanism, > using NS > records in the parent zone, would be appropriate. This involves > creating a new > zone as each new telephone number is registered, and configuring the > zone specifically > on each of Tier-2 name servers. > > I'm not sure I really want to buy in to this level of per-number > provisioning > activity, and see apparently significant advantages in using the > technique of RFC2317 > (Classless IN-ADDR.ARPA delegation) to make life simpler. > > The advantages I see are the following. > > The Tier-1 zone file becomes smaller, with just one CNAME (or DNAME) > record per > delegation, rather than two or more NS records. > > At Tier 2, the named configuration file needs only per-server, rather > than per-number- > per-server provisioning activity, and propagation of newly-registered > numbers is driven > by NOTIFY rather than by reloading the updated configuration file on > each server. > > This looks like the way to go, but perhaps I'm missing something ? > > Best regards, > > Niall O'Reilly > UCD Computing Services
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