Only 5x IPv4 /8 remaining at IANA

Thu Oct 21 15:07:26 UTC 2010

Hi,

Showing my ignorance here, but this is one of the things I have wondered, given that we run both v4 and v6 for a period of time on the Internet, presumably at one time or another a particular resource may only be able in v4 land, then v4 and v6, then finally v6 only.

I have never been particularly clear how an end network that exists only in v4 or v6 address space is able to access a resource that only exists in the other.  Is can sort of see some freaking huge NAT box type thing that summarizes v6 in a v4 address scope or contains the v4 address range at some point inside the v6 address space - but how can a v4 host get to a hot in v6 world that sits outside this without going through some form of proxy / nat gateway between the two.

Or are the two simply not inter-communicable?

Ben

-----Original Message-----
From: Patrick Giagnocavo [mailto:patrick at zill.net] 
Sent: 21 October 2010 15:59
To: Owen DeLong; NANOG
Subject: Re: Only 5x IPv4 /8 remaining at IANA

On 10/21/2010 4:28 AM, Owen DeLong wrote:

>> Actually for those of my clients in one location, it served as an
>> impetus to extend a contract with Level3 for another 3 years - with
>> their existing allocation of a /24 of IPv4 addresses included.
> 
> All well and good until some of their customers are on IPv6...
> Then what?

I'm sorry, can you expand on exactly what you mean by this?

Are IPv6 connected machines unable to access IPv4 addresses?

Or is this more IPV6 fanboi-ism?

--Patrick

--------------------------------------------------------------------------
BODY { MARGIN: 0px}.footerdark { LINE-HEIGHT: 13px; FONT-FAMILY: Arial, Helvetica, sans-serif; COLOR: #001a35; FONT-SIZE: 9px; FONT-WEIGHT: normal; TEXT-DECORATION: none}.blackcopy { LINE-HEIGHT: 12px; FONT-FAMILY: Arial, Helvetica, sans-serif; COLOR: #000000; FONT-SIZE: 10px; FONT-WEIGHT: bold; TEXT-DECORATION: none}.bluecopy { LINE-HEIGHT: 12px; FONT-FAMILY: Arial, Helvetica, sans-serif; COLOR: #29aae2; FONT-SIZE: 10px; FONT-WEIGHT: bold; TEXT-DECORATION: none}.address { LINE-HEIGHT: 12px; FONT-FAMILY: Arial, Helvetica, sans-serif; COLOR: #000000; FONT-SIZE: 10px; TEXT-DECORATION: none}.footerlight { LINE-HEIGHT: 13px; FONT-FAMILY: Arial, Helvetica, sans-serif; COLOR: #667891; FONT-SIZE: 9px; FONT-WEIGHT: normal; TEXT-DECORATION: none}.pinkcopy { LINE-HEIGHT: 12px; FONT-FAMILY: Arial, Helvetica, sans-serif; COLOR: #ed174d; FONT-SIZE: 10px; FONT-WEIGHT: bold; TEXT-DECORATION: none}
Ben Butler
Director Tel: 0333 666 3332 
Fax: 0333 666 3331
C2 Business Networking Ltd
The Paddock, London Road, Nantwich, Cheshire, CW5 7JL
http://www.c2internet.net/

Part of the Atlas Business Group of Companies plc 
Registered in England: 07102986 Registered Address: Datum House, Electra Way, Crewe CW1 6ZF Vat Registration No: 712 9503 48
This message is confidential and intended for the use only of the person to whom it is addressed. If you are not the intended recipient you are strictly prohibited from reading, disseminating, copying, printing, re-transmitting or using this message or its contents in any way. Opinions, conclusions and other information expressed in this message are not given or authorised by the Company unless otherwise indicated by an authorised representative independent of this message. The Company does not accept liability for any data corruption, interception or amendment to any e-mail or the consequences thereof.Emails addressed to individuals may not necessarily be read by that person unless they are in the office.Calls to and from any of the Atlas Business Group of Companies may be recorded for the purposes of training, monitoring of quality and customer services.