Home page logo

nanog logo nanog mailing list archives

Re: IPv6 end user addressing
From: Joel Jaeggli <joelja () bogus com>
Date: Sun, 7 Aug 2011 15:41:23 -0700

On Aug 7, 2011, at 3:09 PM, Jonathon Exley wrote:

This has probably been said before, but it makes me uncomfortable to think of everybody in the world being given /48 
subnets by default.
All of a sudden that wide expanse of 2^128 IP addresses shrinks to 2^48 sites. Sure that's still 65535 times more 
than 2^32 IPv4 addresses, but wouldn't it be wise to apply some conservatism now to allow the IPv6 address space to 
last for many more years? 

2000::/3 is 1/8th of the address range. There are other things worth conserving  not just /48s like the ability 
aggregate your whole assignment. 3.5 * 10^13 is a lot of /48s, but it's likely not enough so we'll get to crack the 
seal on 4000::/3 eventually and so on.

After all, there are only 4 bits of IP version field so the basic packet format won't last forever.


This email and attachments: are confidential; may be protected by
privilege and copyright; if received in error may not be used,copied,
or kept; are not guaranteed to be virus-free; may not express the
views of Kordia(R); do not designate an information system; and do not
give rise to any liability for Kordia(R).

  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]