Use of an X.500/LDAP directory to support MIXER address mapping (RFC2164)
Original Publication Date: 1998-Jan-01
Included in the Prior Art Database: 2019-Feb-15
Internet Society Requests For Comment (RFCs)
This specification defines how to represent and maintain these mappings (MIXER Conformant Global Address Mappings of MCGAMs) in an X.500 or LDAP directory. [STANDARDS-TRACK]
Network Working Group S. Kille Request for Comments: 2164 Isode Ltd. Obsoletes: 1838 January 1998 Category: Standards Track
Use of an X.500/LDAP directory to support MIXER address mapping
Status of this Memo
This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.
Copyright (C) The Internet Society (1998). All Rights Reserved.
1 MIXER X.400/RFC 822 Mappings
MIXER (RFC 2156) defines an algorithm for use of a set of global mapping between X.400 and RFC 822 addresses . This specification defines how to represent and maintain these mappings (MIXER Conformant Global Address Mappings of MCGAMs) in an X.500 or LDAP directory. Mechanisms for representing OR Address and Domain hierarchies within the DIT are defined in [5, 2]. These techniques are used to define two independent subtrees in the DIT, which contain the mapping information. The benefits of this approach are:
1. The mapping information is kept in a clearly defined area which can be widely replicated in an efficient manner. The tree is constrained to hold only information needed to support the mapping. This is important as gateways need good access to the entire mapping.
2. It facilitates migration from a table-based approach.
3. It handles the issues of "missing components" in a natural manner.
An alternative approach which is not taken is to locate the information in the routing subtrees. The benefits of this would be:
Kille Standards Track [Page 1]
RFC 2164 X.500/LDAP Directory to Support MIXER January 1998
o It is the "natural" location, and will also help to ensure correct administrative authority for a mapping definition.
o The tree will usually be accessed for routing, and so it will be efficient for addresses which are being routed.
This is not done, as the benefits of the approach proposed are greater.
MCGAMs are global. A MIXER gateway may use any set of MCGAMs. A key use of the directory is to enable MIXER gateways to share MCGAMs and to share the effort of maintaining and publishing MCGAMs. This specification and MIXER also recognise that there is not a single unique location for publication of all MCGAMs. This specification allows for multiple sets of MCGAMs to be published. Each set of MCGAMs is published under a single part of the directory. There are four mappings, which are represented by two subtrees located under any part of the DIT. For the examples the location defined below is used:
OU=MIXER MCGAMs, O=Zydeco Plc, C=GB
These subtree roots are of object class subtree, and use the mechanism for representing subtrees defined in .
X.400 to RFC 822 This table gives the equivalence mapping from X.400 to RFC 822. There is an OR Address tree under this. An example entry is: