Classless Inter-domain Routing (CIDR): The Internet Address Assignment and Aggregation Plan

Metadata

Publisher: IETF
Doc Type: Best Practice
Pages: 27
Abstract: This memo discusses the strategy for address assignment of the existing 32-bit IPv4 address space with a view toward conserving the address space and limiting the growth rate of global routing state. This document obsoletes the original Classless Inter-domain Routing (CIDR) spec in RFC 1519, with changes made both to clarify the concepts it introduced and, after more than twelve years, to update the Internet community on the results of deploying the technology described. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.
Publication Date: 2006-08-01
Status Note: Best Current Practice
DOI: 10.17487/RFC4632
Link: https://doi.org/10.17487/RFC4632
Author(s): Vince Fuller
Tony Li
Keyword(s): CIDR-STRA

Latest version of IETF RFC 4632

Document Versions — IETF RFC 4632

▶ IETF RFC 4632 (2006-08-01)

THIS DOC [ACTIVE] [LATEST VERSION]

Normative Reference(s)

IETF RFC 791 [Active*]

Bibliographic Reference(s)

Internet Assigned Numbers Authority [Active, Versionless]
"Graph: Active BGP Table Entries, 1988 to Present", < http://bgp.potaroo.net/as4637/ >. EXTERNAL
"CIDR Police - Please Pull Over and Show Us Your BGP", < http://www.nanog.org/mtg-0302/cidr.html >. EXTERNAL
"NANOG mailing list discussion of the "AS 7007" incident", < http://www.merit.edu/mail.archives/nanog/1997-04/ msg00340.html >. EXTERNAL
"The Long and Winding Road", < http://rms46.vlsm.org/1/42.html >. EXTERNAL
"RIPE Network Coordination Centre", < http://www.ripe.net >. EXTERNAL
"Number Resource Organization", < http://www.nro.net >. EXTERNAL
"The CIDR Report", < http://www.cidr-report.org/ >. EXTERNAL
IETF RFC 904 [Active*]
IETF RFC 1058 [Active*]
IETF RFC 1195 [Active*]
IETF RFC 1338 [Superseded*]
IETF RFC 1380 [Active*]
IETF RFC 1518 [Active*]
IETF RFC 1519 [Superseded*]
IETF RFC 2131 [Active*]
IETF RFC 2317 [Active*]
IETF RFC 2328 [Active*]
IETF RFC 2453 [Active*]
IETF RFC 3021 [Active*]
IETF RFC 3221 [Active*]
IETF RFC 4116 [Active*]
IETF RFC 4271 [Active*]

Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/RFC4632.json

Reference Tree

Explore all references and references to this document, as a navigable tree.

Open Reference Tree

Reference this Doc

Plain text (ISO 690 compliant)

Preview:

IETF RFC 4632, Classless Inter-domain Routing (CIDR): The Internet Address Assignment and Aggregation Plan. Available at https://doi.org/10.17487/RFC4632

Snippet:

IETF RFC 4632, Classless Inter-domain Routing (CIDR): The Internet Address Assignment and Aggregation Plan. Available at https://doi.org/10.17487/RFC4632

HTML (ISO 690 compliant)

Preview:

IETF RFC 4632, Classless Inter-domain Routing (CIDR): The Internet Address Assignment and Aggregation Plan. Available at https://doi.org/10.17487/RFC4632

Snippet:

<span class="citation"><cite>IETF RFC 4632</cite>, Classless Inter-domain Routing (CIDR): The Internet Address Assignment and Aggregation Plan. Available at <a href="https://doi.org/10.17487/RFC4632" target="_blank" rel="noopener">https://doi.org/10.17487/RFC4632</a></span>

SMPTE's HTML Pub

Preview:

IETF RFC 4632, Classless Inter-domain Routing (CIDR): The Internet Address Assignment and Aggregation Plan
doi: 10.17487/RFC4632
url: https://doi.org/10.17487/RFC4632

Snippet:

<li>
<cite id="bib-rfc4632">IETF RFC 4632</cite>, Classless Inter-domain Routing (CIDR): The Internet Address Assignment and Aggregation Plan
<span class="doi">10.17487/RFC4632</span>
</li>

Referenced By

IETF RFC 4945 [Active*]
IETF RFC 5280 [Active, Amended*]