database logo graphic

BCP 171

RFC 6441

"Time to Remove Filters for Previously Unallocated IPv4 /8s", November 2011

Canonical URL:
http://www.rfc-editor.org/rfc/rfc6441.txt
This document is also available in this non-normative format: PDF.
Status:
BEST CURRENT PRACTICE
Author:
L. Vegoda
Stream:
IETF
Source:
grow (ops)

Cite this RFC: TXT  |  XML

Other actions: Find Errata (if any)  |  Submit Errata  |  Find IPR Disclosures from the IETF


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. This memo documents an Internet Best Current Practice.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


Go to the RFC Editor Homepage.