On 06/18/11 19:22, Casey Deccio wrote:
In particular, if the name of the name server is itself in the subzone, we could be faced with the situation where the NS RRs tell us that in order to learn a name server's address, we should contact the server using the address we wish to learn. To fix this problem, a zone contains "glue" RRs which are not part of the authoritative data, and are address RRs for the servers. These RRs are only necessary if the name server's name is "below" the cut, and are only used as part of a referral response.
How many levels "below the cut"?
Even if referring servers return such RRs, they are considered out-of-bailiwick, and resolvers should resolve the names, rather than trust the additional RRs. i.e., .org servers should not be handing out RRs under .edu. Hence the dependencies, which can get long and complicated, but they're part of the DNS.
I didn't say that they should--only that the ORG registrar (or registry) may have to enforce that glue exist in EDU and vice versa. That's the point of sibling glue.
michael _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
