Browse Prior Art Database

Time to Remove Filters for Previously Unallocated IPv4 /8s (RFC6441)

IP.com Disclosure Number: IPCOM000213149D
Publication Date: 2011-Dec-06
Document File: 10 page(s) / 9K

Publishing Venue

The IP.com Prior Art Database

Related People

L. Vegoda: AUTHOR

Abstract

It has been common for network administrators to filter IP traffic from and BGP prefixes of unallocated IPv4 address space. Now that there are no longer any unallocated IPv4 /8s, this practise is more complicated, fragile, and expensive. Network administrators are advised to remove filters based on the registration status of the address space.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 32% of the total text.

Internet Engineering Task Force (IETF)                         L. Vegoda Request for Comments: 6441                                         ICANN BCP: 171                                                   November 2011 Category: Best Current Practice ISSN: 2070-1721

        Time to Remove Filters for Previously Unallocated IPv4 /8s

Abstract

   It has been common for network administrators to filter IP traffic    from and BGP prefixes of unallocated IPv4 address space.  Now that    there are no longer any unallocated IPv4 /8s, this practise is more    complicated, fragile, and expensive.  Network administrators are    advised to remove filters based on the registration status of the    address space.

   This document explains why any remaining packet and BGP prefix    filters for unallocated IPv4 /8s should now be removed on border    routers and documents those IPv4 unicast prefixes that should not be    routed across the public Internet.

Status of This Memo

   This memo documents an Internet Best Current Practice.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Further information on    BCPs is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at    http://www.rfc-editor.org/info/rfc6441.

Copyright Notice

   Copyright (c) 2011 IETF Trust and the persons identified as the    document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal    Provisions Relating to IETF Documents    (http://trustee.ietf.org/license-info) in effect on the date of    publication of this document.  Please review these documents    carefully, as they describe your rights and restrictions with respect    to this document.  Code Components extracted from this document must

Vegoda                    Best Current Practice                 [Page 1]
 RFC 6441                    Remove /8 Filters              November 2011

    include Simplified BSD License text as described in Section 4.e of    the Trust Legal Provisions and are provided without warranty as    described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 2    2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 2    3.  Traffic Filtering Options . . . . . . . . . . . . . . . . . . . 3      3.1.  No Longer Filtering Based on Address Registration            Status  ....