A Suggested Scheme for DNS Resolution of Networks and Gateways
Note: This ballot was opened for revision 05 and is now closed.
(David Kessens) Yes
(Harald Alvestrand) No Objection
Reviewed by Suzanne Woolf, Gen-ART I recommend the comments be passed to the RFC Editor. The draft is listed in the agenda as "informational". As written, it may be intended as "BCP". But there are no usage notes revealing the intention. The draft discusses a mechanism for using specially-formed chains of PTR records to publish the names and IP addresses of the first-hop router for a given IP address, and (implicitly) the netmask. The mechanism is not too dissimilar to that used for subdelegating responsibility for PTR records in prefix delegations longer than /24 (RFC 2317). At first reading, this strikes me as the sort of use of the DNS often proposed by people who think the DNS is a more sophisticated and robust database mechanism than it is. Such schemes tend to be harmless if people decide they're merely useless, but often they don't scale very well if people do like them. There are also may be implementation pitfalls that can generate lots of new queries on the infrastructure. I suggest this draft be reviewed by DNSOP, if only to add usage and implementation notes suggesting the limitations or hazards of the proposed approach. There are no protocol issues I can see so it's out of scope for DNSEXT.