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Dave Taht
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rfcs/draft-gilmore-taht-v4uniext.txt
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@@ -6,7 +6,7 @@ Internet Area Working Group J. Gilmore
Internet-Draft Electronic Frontier Foundation
Updates: 2827, 6890 (if approved) D. Taeht
Intended status: Best Current Practice TekLibre
Expires: August 26, 2019 February 22, 2019
Expires: August 30, 2019 February 26, 2019
IPv4 Unicast Extensions
@@ -14,6 +14,12 @@ Expires: August 26, 2019 February 22, 2019
Abstract
Editor's note: This draft is a _WIP_. Please do not recirculate.
Please! Feel free to join us in testing a ton of patches and
equipment and help out at: https://github.com/dtaht/ipv4-cleanup
[1]
Thank you!
Unicast addresses are the most successful and most useful kind of
addresses in the Internet Protocol (IP). Non-unicast portions have
been allocated greater space than their usage requires, including
@@ -42,22 +48,21 @@ Status of This Memo
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on August 26, 2019.
This Internet-Draft will expire on August 30, 2019.
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Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved.
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This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
@@ -101,19 +106,19 @@ Table of Contents
8.2. Address Range: 127/8 . . . . . . . . . . . . . . . . . . 17
8.3. Address Range: 225/8 through 231/8 . . . . . . . . . . . 17
8.4. Address Range: 240/4 . . . . . . . . . . . . . . . . . . 17
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8.5. Routing to extended unicast networks . . . . . . . . . . 18
8.6. Zeroth and final addresses in subnets . . . . . . . . . . 18
9. Related Work . . . . . . . . . . . . . . . . . . . . . . . . 19
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 19
11. Security Considerations . . . . . . . . . . . . . . . . . . . 19
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12. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 20
13. References . . . . . . . . . . . . . . . . . . . . . . . . . 20
13.1. Normative References . . . . . . . . . . . . . . . . . . 20
@@ -158,18 +163,17 @@ Internet-Draft v4unicast-ext February 2019
concatenated network of diversely implemented underlying networks,
connected by simple and relatively memoryless gateways.
The IP address, then expressed in x.x.x.x notation, could be used to
specify both a particular network and a Host address on that network.
There were several different classes of IP address, each having
different numbers of bits allocated for the network # and address
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The IP address, then expressed in x.x.x.x notation, could be used to
specify both a particular network and a Host address on that network.
There were several different classes of IP address, each having
different numbers of bits allocated for the network # and address
within that network. Class A networks used 8 bits for network # and
allowed 24 bits for address-on-that-network. The ARPANET addresses
could be encoded into 24 bits. So, for ARPANET (and some of its
@@ -214,18 +218,17 @@ Internet-Draft v4unicast-ext February 2019
"unicast", stating: "In this paper, we describe a model of multicast
service we call host groups and propose this model as a way to
support multicast in the DARPA Internet environment. We argue that
it is feasible to implement this facility as an extension of the
existing 'unicast' IP datagram model and mechanism."
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it is feasible to implement this facility as an extension of the
existing 'unicast' IP datagram model and mechanism."
1/8th of the 32-bit address space was left as "reserved for future
use", and a few other 256ths were reserved for simple protocol
functions or for future use in [RFC0791] (section 3.2) and [RFC0796].
@@ -271,17 +274,17 @@ Internet-Draft v4unicast-ext February 2019
Initially, subnets were only used "locally". The global Internet
routing infrastructure still only knew how to route to Class A, B,
and C networks. Local equipment in each such network could route
locally to any local subnets, such as multiple Ethernets on a
university campus.
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locally to any local subnets, such as multiple Ethernets on a
university campus.
Also in 1984, broadcast addresses were added to IPv4 by [RFC0919],
and [RFC0922]. This required reserving one IPv4 address within each
and every network or subnet (the final address in that network or
@@ -330,10 +333,7 @@ Internet-Draft v4unicast-ext February 2019
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@@ -910,20 +910,22 @@ Internet-Draft v4unicast-ext February 2019
8.1. Address Range: 0/8
No implementation is currently known to allow the unicast use of 0/8.
However, small Linux kernel patches provide this function.
However, small Linux and FreeBSD kernel patches provide this
function.
8.2. Address Range: 127/8
No implementation is currently known to allow the unicast use of
127/8. There are preliminary Linux kernel patches that still have
some remaining issues. In addition, system configuration scripts
that configure the internal "loopback interface" probably need
modification.
127/8. There are preliminary Linux and FreeBSD kernel patches. TP
uses 127.127 for the clock interface. In addition, system
configuration scripts that configure the internal "loopback
interface" probably need modification.
8.3. Address Range: 225/8 through 231/8
No implementation is currently known to allow the unicast use of 0/8.
However, small Linux kernel patches provide this function.
However, small Linux and FreeBSD kernel patches provide this
function.
8.4. Address Range: 240/4
@@ -933,27 +935,29 @@ Internet-Draft v4unicast-ext February 2019
approximately 2008. There are some issues with parts of BSD network
stack that treat Class-E addresses as "invalid". There are also
cases of translation (NAT64) where checks reject Class-E addresses
and need small fixes. Four out of the top 5 open source IoT stacks
already treat 240/4 as unicast, with a 3 line patch awaiting
submission for the fifth.
and need small fixes. In both cases we have the patches under review
for FreeBSD. Four out of the top 5 open source IoT stacks already
treat 240/4 as unicast, with a 3 line patch awaiting submission for
the fifth.
Some deployments of the BIND Domain Name System implementation (e.g.
Debian) override the reverse DNS for 255.in-addr.arpa. with a local
empty domain, and do not forward requests for those addresses. These
packages will require revision.
Recent versions of Microsoft Windows will not accept nor forward any
packet with either a source or destination address in 240/4. Nor
will they assign an interface address in this range, if one is
offered via DHCP. No plans have been announced for modifications to
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Recent versions of Microsoft Windows will not accept nor forward any
packet with either a source or destination address in 240/4. Nor
will they assign an interface address in this range, if one is
offered via DHCP. No plans have been announced for modifications to
any version of Microsoft Windows. Windows developers are aware of
the work required, and are considering it for a future version.
@@ -1001,11 +1005,7 @@ Internet-Draft v4unicast-ext February 2019
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@@ -1034,9 +1034,9 @@ Internet-Draft v4unicast-ext February 2019
240.0.0.0/4 and 0.0.0.0/8 move from the "special purpose" registry
(https://www.iana.org/assignments/iana-ipv4-special-registry/iana-
ipv4-special-registry.xhtml [1]) and are added to the regular "ipv4-
ipv4-special-registry.xhtml [2]) and are added to the regular "ipv4-
address-space" registry ( https://www.iana.org/assignments/ipv4-
address-space/ipv4-address-space.xhtml) [2]
address-space/ipv4-address-space.xhtml) [3]
0.0.0.0/32 and 127.0.0.0/16 should be added to the special purpose
registry.
@@ -1061,7 +1061,7 @@ Internet-Draft v4unicast-ext February 2019
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13.3. URIs
[1] https://www.iana.org/assignments/iana-ipv4-special-registry/iana-
[1] https://github.com/dtaht/ipv4-cleanup
[2] https://www.iana.org/assignments/iana-ipv4-special-registry/iana-
ipv4-special-registry.xhtml
[2] https://www.iana.org/assignments/ipv4-address-space/ipv4-address-
[3] https://www.iana.org/assignments/ipv4-address-space/ipv4-address-
space.xhtml)
Authors' Addresses
@@ -1339,9 +1341,7 @@ Authors' Addresses
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