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Re: Delegating /24's from a /19
On Tue, 15 Mar 2005, Robert Blayzor wrote: > firstname.lastname@example.org wrote: > > Either by doing DNS delegation on the zone boundary or by SWIP'ing the > > space to the other company. > > You can SWIP it yes, but that won't help DNS on small blocks like /24's. Huh? Unless I've missed something really obvious, the original requestor has a /19 allocation, say 192.168.32.0/19 . ARIN has DNS-delegated this to the original requestor as a series of /24s, eg: 32.168.192.in-addr.arpa ns1.example.com, ns2.example.com 33.168.192.in-addr.arpa ditto ... 62.168.192.in-addr.arpa ditto 63.168.192.in-addr.arpa ditto There are two solutions. One, he secondaries the appropriate domain from the customers nameservers onto his nameservers. Very easy, since the delegation already points to his nameservers, and he can market this as 'the domain is there even if you are disconnected!'. Or two, he creates a seperate netblock in the ARIN registry describing the customer's /24, and nominates their nameservers instead of his, listing his nameservers as backup just in case. ARIN change the DNS delegation at their next zone generation. Or third, he describes the situation to a friendly ARIN representative, who ought to give the above solutions, as well as suggest getting the DNS & Bind book from O'Reilly for bedtime reading. --==-- Bruce.