Radu,

That will cause a performance overload on routers and then each and every device on the internet will need to be upgraded - an impossible mission. My solution is feasible, can be very quickly deployed, doesn't require the upgrade of all devices in the internet and will bring to each RIR more than 800,000,000 IPv4 addresses (and will also bring to each ISP and ASN a high amount of free IPv4 addresses).

Respectfully,
Elad
From: members-discuss <members-discuss-bounces@ripe.net> on behalf of Radu Anghel via members-discuss <members-discuss@ripe.net>
Sent: Saturday, April 25, 2020 10:51 PM
To: members-discuss@ripe.net <members-discuss@ripe.net>
Subject: Re: [members-discuss] Technical solution to resolve the IPv4 Exhaustion problem and to add more 4, 294, 967, 296 IPv4 addresses that are needed in the world
 
Hi Elad,

Do you think that if we also display them in HEX (0-FFFF.0-FFFF) we
could get double the amout of IPv4+???

Thaaanks!

Radu


On 25.04.2020 20:20, Elad Cohen wrote:
> Hello Everyone,
>
> I want to share with you my technical solution to the "IPv4 Exhaustion"
> problem (without to upgrade each and every router that exist in the
> internet), using the below implementation there will be more
> 4,294,967,296‬ IPv4 addresses that the world needs so much:
>
> Currently in an IPv4 packet - the source address and the destination
> address are being represented each by four bytes, each of these four
> bytes are being displayed as: [0-255].[0-255].[0-255].[0-255]
>
> But it is up to us to choose how we want to display them, for example:
> four bytes can also be displayed as [0-65535].[0-65535] (two numbers and
> one dot, the two numbers are bigger because in total they also being
> represented as four bytes)
>
> So there can be one set of 4,294,967,296‬ IPv4 addresses (the one that
> we know in the display format of [0-255].[0-255].[0-255].[0-255])
>
> and another set of 4,294,967,296 IPv4 addresses (with a new format of
> [0-65535].[0-65535])
>
> We need to have a mark, a flag, in the ip packet header - in order to
> know if the source address is of the old formatting (IPv4) or of the new
> formatting (lets call it IPv4+), for that mark the 'reserved bit' in the
> ip header can be used, so in case the source address is of IPv4+ or in
> case that the destination address is of IPv4+ (or in case that both the
> source and destination addresses are of IPv4+) then the reserved bit in
> the ip header will be set to 1 , we then also need to know exactly if
> the source address is of IPv4+ or not (meaning of IPv4) and if the
> destination address is of IPv4+ or not (meaning of IPv4) - this can be
> done by marking the DF flag if the source address is of IPv4+ (and not
> marking the DF flag if the source address is of IPv4) and marking the MF
> flag if the destination address is of IPv4+ (and not marking the MF flag
> if the destination address is of IPv4), by using the DF and MF bits
> which are related to fragmentation (whenever the reserved bit is set to
> '1') we are losing the ip fragmentation functionality for any traffic
> with an IPv4+ address (for traffic between two IPv4 addresses, the
> reserved bit is not set to '1' and hence optional ip fragment
> functionality is unchanged)
>
> We need to know the MTU before an IPv4+ packet will be sent, because no
> fragmentation will be able to be done with IPv4+ , the current "Path MTU
> Discovery" (RFC 1191) is not good for that case because it is using the
> DF bit which we are using as well (and in IPv4+ traffic a DF flag set to
> 1 is marking that the source address is of IPv4+), and also ICMP
> protocol can be blocked by routers in the routing path, the solution is
> to send multiple udp requests (with fixed known MTU sizes) to the
> destination address (lets call it IPv4+ handshake) - the destination
> address may or may not receive them (in case a router in the routing
> path have multiple upstreams and wasn't upgraded to an upper version
> that supports IPv4+ then it will not recognize the reserved bit and the
> DF and MF bits related to it, it will not recognize the new IPv4+
> addresses and even if the reserved bit is set to '1' and MF flag is set
> to '1' in the ip packet - it will route to to the destination address
> just like it is an IPv4 address and not IPv4+ address, meaning to a
> completely different destination address) - in case the destination
> address indeed received the IPv4+ packets - it will send back the udp
> requests to the source address at the exact same sizes (with the
> reserved bit flag set to '1' and with the DF and MF flags set
> accordingly) - when the source address will receive them - the source
> address will know that the destination address is supporting IPv4+ ,
> that ip packets with new IPv4+ formatting will reach the destination and
> the source address will know what is the biggest size of the udp request
> that was received - and it will be the MTU for that specific connection
> between the source and the destination addresses (The IPv4+ handshake
> will be done again if there is no response from the destination after
> the initial udp handshake was already completed successfully).
>
> The udp handshake between a source address and a destination address
> (that any of them or them both is an IPv4+ address) will use a specific
> udp port, an availalbe unassigned port between 0 to 1023, an operating
> system networking stack (that was updated for IPv4+ with the operating
> system automatic updating system) will know exactly what this udp port
> is for - and will react accordingly, the upgraded operating system
> networking stack will also check that the destination address (in the
> IPv4 or in the IPv4+ format) is set locally in the operating system,
> before sending the udp requests back to the source address (if not then
> the ip packet will be dropped by the upgraded operating system
> networking stack). Any operating system that wasn't upgraded to support
> IPv4+ - will just drop that kind of udp requests.
>
> IPv4+ is fully backward compatible to IPv4 (and any router that was not
> upgraded yet to IPv4+ will not cause IPv4 traffic to break), it is also
> not adding any new fields to ip packets or using new fields, IPv4+ will
> not cause any performance overload for any supported router.
>
> The reason that the MF and DF bits are being use for IPv4+ and not the
> ToS / IP-ID / Options in ip header are being used is because we cannot
> be 100% sure that the ToS / IP-ID / Options in the ip header will not be
> changed or dropped by any rouer in the routing path that wasn't upgraded
> to IPv4+ (and we don't want to upgrade any router in the world because
> it is an impossible mission) - in the ip header ToS is being cleared by
> some routers - IP-ID can be changed by NAT routers - Options field is
> dropped by many routers, we can trust that the DF and MF flags will not
> be modified in the routing path by routers that weren't upgraded to IPv4+.
>
> For the above solution not all the internet devices in the world needs
> to be patched/upgraded to support IPv4+ which is an impossible mission,
> end-users operating systems need to be upgraded (but it can be done
> simply using their automatic updating system), BGP routers (and any
> router with multiple physical routing paths) will need to have its
> firmware upgraded to support IPv4+, any NAT router that will want to use
> an external IPv4+ address will need to have its firmware upgraded (any
> NAT router that will use an external IPv4 address will not need to have
> its firmware upgraded, only the internet devices in the LAN of the NAT
> router will need to have a single operating system update in order for
> them to access IPv4+ addresses in the internet), any home router (not
> NAT) or home modem will not need to have a firmware upgrade and IPv4+
> functionality will be transparent to them.
>
> The deployment of IPv4+ can be fairly easy and very fast, a round table
> of one person from each one of the 5 RIRs and from each one of the
> operating systems vendors and from each one of the router manufacture
> vendors. Even if IPv4+ will be deployed over time, it will not cause the
> internet to break (devices that need to be upgraded to IPv4+ and didn't
> yet will work exactly as they are now with IPv4, they will just not yet
> support IPv4+).
>
> The above will resolve the "IPv4 Exhaustion" problem and will bring to
> each one of the 5 RIRs almost 900,000,000 new IPv4+ addresses that will
> be able to the provided to the LIRs worldwide, if you have any question
> please let me know.
>
> Respectfully,
> Elad
>
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