Yuri,

I wouldn't have a difficulty with it :) ... I dont see a reason why it wouldnt work ... although you would want everyone who is filtering bogons manually from their routers and the 240.0.0.0/4 has been considered a bogon for quite some time... so alot of people who do rudimentary prefix filtering on their border routers would have to update to make that range usable ... I have heard arguments that some Operating systems have that range filtered out and is non configurable...

but I doubt the IPv6 adoption advocates ... or the IPv4 Sellers would like that idea too much as it would cause the price per ipv4 to collapse...

I reckon this question has been asked before and I'm sure someone will point us to that discussion before...

Hope this helps,

On Sat, Jun 11, 2016 at 7:45 PM, NTX NOC <noc@ntx.ru> wrote:

Dear all,

As we see ISPs and community would like to have more IPv4 space in use.

I would like to ask a question what do people think about other side of
IPv4 numeration space. Because we have in IPv4 a lot of addresses not in
use at all but that space could be easy used.

240.0.0.0/4 Reserved (former Class E network) RFC 1700

it's 16 */8 networks. More then 256 Millions of routable and never used
IPv4. 185/8 network has about 6.4M free and total RIPE has about 15M
free IPv4 and we all say 185/8 will be enough for 2-3 years and rest -
for some more time. But 256 M Ipv4 space could be enough for years!

Space reserved for future Use. But will the future come to us or not?

https://en.wikipedia.org/wiki/IPv4
https://tools.ietf.org/html/rfc1700

Is far as I see routers could easy start to use that IP space. People
spend a lot of time and money to get some IPs but not to ask IANA to
allow use this space. Technically it's very easy to start use IPs from
such ranges.

What does community thinks about it?

Yuri

Kindest regards,
Tom Smyth

Mobile: +353 87 6193172
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