Network Working Group R. Austein Request for Comments: 3197 InterNetShare Category: Informational November 2001 Applicability Statement for DNS MIB Extensions Status of this Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (2001). All Rights Reserved.
AbstractThis document explains why, after more than six years as proposed standards, the DNS Server and Resolver MIB extensions were never deployed, and recommends retiring these MIB extensions by moving them to Historical status.
of concerns with the network management directorate, but the WG resisted every attempt to remove any of these variables. In the end, large portions of the MIB extensions were moved into optional groups in an attempt to get the required subset down to a manageable size. The DNS Server and Resolver MIB extensions were one of the first attempts to write MIB extensions for a protocol usually considered to be at the application layer. Fairly early on it became clear that, while it was certainly possible to write MIB extensions for DNS, the SMI was not really designed with this sort of thing in mind. A case in point was the attempt to provide direct indexing into the caches in the resolver MIB extensions: while arguably the only sane way to do this for a large cache, this required much more complex indexing clauses than is usual, and ended up running into known length limits for object identifiers in some SNMP implementations. Furthermore, the lack of either real proxy MIB support in SNMP managers or a standard subagent protocol meant that there was no reasonable way to implement the MIB extensions in the dominant implementation (BIND). When the AgentX subagent protocol was developed a few years later, we initially hoped that this would finally clear the way for an implementation of the DNS MIB extensions, but by the time AgentX was a viable protocol it had become clear that nobody really wanted to implement these MIB extensions. Finally, the MIB extensions took much too long to produce. In retrospect, this should have been a clear warning sign, particularly when the WG had clearly become so tired of the project that the authors found it impossible to elicit any comments whatsoever on the documents.
- If the entire project is taking too long, perhaps that's a hint too. 1611 and 1612 be reclassified as Historical documents. [DNS-SERVER-MIB] Austein, R. and J. Saperia, "DNS Server MIB Extensions", RFC 1611, May 1994. [DNS-RESOLVER-MIB] Austein, R. and J. Saperia, "DNS Resolver MIB Extensions", RFC 1612, May 1994. [DNS-DYNAMIC-UPDATE] Vixie, P., Thomson, S., Rekhter, Y. and J. Bound, "Dynamic Updates in the Domain Name System (DNS UPDATE)", RFC 2136, April 1997. [AGENTX] Daniele, M., Wijnen, B., Ellison, M., and D. Francisco, "Agent Extensibility (AgentX) Protocol Version 1", RFC 2741, January 2000.
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