As per Relevance of the word proposed, we have this rfc below:
Network Working Group P.
Request for Comments: 1375 Tansin A. Darcos & Co
October 1992
Suggestion for New Classes of IP
Status of this
This memo provides information for the Internet community. It
not specify an Internet standard. Distribution of this memo
unlimited
This RFC suggests a change in the method of specifying the IP
to add new classes of networks to be called F, G, H, and K, to
the amount of wasted address space, and to increase the available
address number space, especially for smaller organizations or
of connectors that do not need or do not want a full Class C
address
Table of
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Suggestion for new IP address classes . . . . . . . . . . . . . 2
Current Class C Address . . . . . . . . . . . . . . . . . . 3
Proposed new Class C Address . . . . . . . . . . . . . . . 4
Proposed "Class F" address . . . . . . . . . . . . . . . . 4
Proposed "Class G" address . . . . . . . . . . . . . . . . 4
Proposed "Class H" address . . . . . . . . . . . . . . . . 5
Proposed "Class K" address . . . . . . . . . . . . . . . . 5
Optional selection of routing codes by region . . . . . . . . . 5
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Security Considerations . . . . . . . . . . . . . . . . . . . . 7
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 7
Currently, IP addresses on the Internet are 32-bit quantities
are generally represented as four decimal numbers from 0 to 255,
separated by periods, sometimes called a "dotted" decimal number
The current numbering scheme provides in general for three classes
networks in general use (A,B, and C), and two other classes
networks (D, E).
The Class A networks assign a large address space for the
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RFC 1375 New Classes of IP Addresses October 1992
network to allow up to 254^3 local machines [1]. The Class B
assigns a somewhat smaller address space for the particular
to allow up to 254^2 local machines. The Class C network assigns
still smaller address space for the particular network to allow up
254 local machines
This memo proposes to assign part of the unused Class C address
for smaller networks than are currently available. The term "
D" is used for the "multicast" capability and addresses in "Class E
are reserved for future use. Therefore, these new features for
capability is to be added is being referred to as classes F, G, H
K
Suggestion for new IP address
The most worrisome problem which appears in the literature is
possibility of running out of address space for IP addresses.
schemes are being suggested such as subrouting, introduction
additional bits, and other possibilities
There is an even more serious matter. In all probability, I
that eventually the Internet backbone will either become available
anyone who wants to use it (like public highways) and the costs
for out of taxes or some other method which gets someone else to
for it, or eventually the Internet will be fully commercialized
made available to anyone who wants to buy a permanent connection
With the cost of hardware and connections dropping, some
Bulletin Board Systems (BBSs) which are currently accessible
telephone call may become accessible via TELNET or FTP. When a 9600
baud connection can be obtained for around the price of a phone line
the demand for internet access will skyrocket. This almost
eventual availability to virtually anyone who wants a connection
cause an even greater demand for internet addresses, which
exacerbate this situation. One problem is in the granularity of
addressing, in that the smallest possible IP address one may
allows for as high as 254 IP addresses. If someone wanted only
put four or five computers on the Internet, more than 240
are wasted
Many smaller installations would probably be interested either
placing their computers and/or servers on the Internet (and
helping to pay the cost of running it) or in being able to access
Internet directly, and perhaps making facilities on their
available to others; the problem being that IP addresses on
are not readily available to small classes of users. Also,
possibility exists of eventually placing non-computer and output-
devices such as printers, facsimile machines, and visual
directly on the Internet to allow people to send a message to a
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RFC 1375 New Classes of IP Addresses October 1992
device simply by directing it to a specific internet site as an E
Mail message
The scheme proposed by this paper proposes to make a slight change
one of the classes of network address in a manner which should not
a significant problem for implementing, and should not cause
significant hardship as the addresses to use for this purpose are
now allocated anyway, and may draw some of the drain which would
consumed Class C addresses in large quantity into quantities of
F, H, or K addresses which waste less IP address space
This scheme I am proposing is to allow for very small networks (1
2, 1-7, or 1-15, depending on the number of addresses
administrator of that site thinks he will need), by
the network address to include what is nominally part of the
address. If bridges and routers (and other hardware and software)
not assume that only the last 8 bits make up a local address
permit smaller spaces for local addresses, then this method
not cause problems. Sites needing less than a close order of 256
addresses could simply apply for 2 or more contiguous blocks of
F numbers
Currently, a Class C address consists of a 32-bit number in which
leftmost 3 bits consist of "110" [2]:
The third type of address, class C, has a 21-bit network
and a 8-bit local address. The three highest-order bits are
to 1-1-0. This allows 2,097,152 class C networks
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|1 1 0| NETWORK | Local Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Current Class C
This memo proposes to change Class C addresses to be 4-bit
beginning with "1100":
The third type of address, class C, has a 20-bit network number and
8-bit local address. The four highest-order bits are set to 1-1-0-0,
This allows 1,048,576 class C networks
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RFC 1375 New Classes of IP Addresses October 1992
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|1 1 0 0| NETWORK | Local Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Proposed new Class C
This memo then proposes to add four new types of addresses, to
referred to as "Class F", "Class G", "Class H", and "Class K" [3].
These would all use part of the "old" class C address by all using
addresses that begin with the 4-bit sequence "1101". The Class
addresses would begin with the binary code sequence "11010", Class
addresses begin with "110110", Class H addresses with "1101110",
Class K with "1101111".
Class F addresses will be used for networks having from 1-15
[4], where the number could be expected to exceed 7. Class
addresses are defined as follows
The sixth type of address, class F, has a 23-bit network number,
a 4-bit local address. The five highest-order bits are set to 1-1-
0-1-0. This allows 16,777,256 class F networks
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | | Local |
|1 1 0 1 0| NETWORK |Address
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Proposed "Class F"
Class G is to be defined as follows
The seventh type of address, class G, is reserved for
use. The six highest-order bits are set to 1-1-0-1-1-0.
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | |
|1 1 0 1 1 0| Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Proposed "Class G"
Class H is for small networks which are not expected to exceed 7
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RFC 1375 New Classes of IP Addresses October 1992
connected IP addresses. Class H is to be defined as follows
The eighth type of address, class H, has a 22-bit
number, and a 3-bit local address. The seven highest-order
are set to 1-1-0-1-1-1-0. This allows 4,194,304 Class
addresses [5].
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | |Local
|1 1 0 1 1 1 0| NETWORK | Addr
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Proposed "Class H"
Class K is for sites which either will only have one or two
addresses [6]. Class K is to be defined as follows
The eighth type of address, class K, has a 25-bit
number, and a 1-bit local address. The seven highest-order
are set to 1-1-0-1-1-1-1. This allows 33,554,432 Class
addresses [7].
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| | |*|
|1 1 0 1 0 0| NETWORK | |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* = Local Address, 1 or 0
Proposed "Class K"
Optional selection of routing codes by
Because of the possibility of confusion, some method similar to
international dialing plan might be set up, in which bits 5-8
Class F, bits 7-10 in Class H, and bits 6-9 in Class K could be
to define what part of the world the particular address is in, in
manner similar to the international telephone dialing system,
uses the first digit of the international telephone number
determine the region being used. The current method for
international dialing codes is
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RFC 1375 New Classes of IP Addresses October 1992
1 North America 6 Oceania,
2 Africa 7 Ex-Soviet Union
3 Europe 8
4 Europe 9
5 South America and
If a similar method is used, I would recommend assigning 0,1,10
11 to North America, 8 and 12 to Asia, and leaving 13 through 15
other areas as needed. Note that this would simply make some
choices easier, it is not precisely necessary that this be done
since currently routing is generally done using the shortest path
a site and IP numbers don't really relate to any specific
anywhere in the world
The number form of a class F, G, H or K address could still be
in the standard form n.n.n.n, as long as it is not assumed that
4th chunk number alone identifies a local address and that
with the same preceding 3 chunks do not necessarily belong to
same network
In order to make the address space available, even if the method
implement this feature is not presently available, it is
that Class F, G, H, and K address space should be taken out of
C space and reserved for the purpose of allowing smaller-
networks so that this feature may be made available. Since Class
addresses currently are only using the equivalent of one Class
number anyway, this should not cause a problem
[1] Common practice dictates that neither an address 0 nor 255
be used in any "dotted" address
[2] Reynolds, J., and J. Postel, "Assigned Numbers", STD 2, RFC 1340,
USC/Information Sciences Institute, July 1992.
[3] To prevent confusion, no class "I" or "J" address was created
this memo
[4] It is expected that if the higher part of the network
occupying the 4-bits to the left of the Class F address
neither 0 nor 15, that a class F site could have 16 machines.
the 4-bits to the left are all 0, the Class F site must not
number 0. If the four bits are all 1, the site must not
number 15.
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RFC 1375 New Classes of IP Addresses October 1992
[5] It may be that Class H numbers are more appropriate for
of addresses that will not have as high a demand for access
Internet addresses such as facsimile machines and pagers. (
end digit could be used to determine class of service, i.e., 0
for tone only, 1 and 2 for numeric only, 3 4 and 5
alphanumeric, and 6 and 7 for facsimile machines. Or
combination of these according to the demand. Remember
Internet won't always be just text messages and file transfers
we may eventually see things like voice telephone calls or
data being placed to an Internet address just like calls
via the telephone system. This would require a whole change
the way things are done, but it's always best to look at
future
[6] It is suggested that addresses in this range not be
where the 7 bits to the left of the local number are all
same (all 0 or all 1), to allow all Class K addresses to
two local addresses
[7] Different things can be done with different capabilities.
thought was to set up some group of numbers and use them
indicate systems which are "gateway" systems, i.e., the top
of numbers in Class K could indicate that subnets are
after those numbers, similar to the use of an extension number
the switchboard of a large organization. Another possibility
to assign some of the numbers to specific classes of devices
such as number-only pagers and electronic display devices
Security
Security issues are not discussed in this memo
Author's
Paul
Tansin A. Darcos &
8604 Second Avenue #104
Silver Spring, MD 20910
Phone: 202-310-1011
Telex: 6505066432MCI
E-mail: TDARCOS@MCIMAIL.
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