[AusNOG] /16 for sale.... well not really but why not!

[Michael Andreas Schipp]

Hi Mark,
	At A10 Networks we do a lot of CGN, the normal is to allow 1000 ports or less to each user.  So take 64k ports, reserve 16K for bursting clients gives you 560 user per IP.  In the EMEA area they use even lower port counts.

Thanks
Michael.

-----Original Message-----
From: ausnog-bounces at lists.ausnog.net [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Mark Smith
Sent: Saturday, 26 January 2013 11:50 AM
To: aj at sneep.net; Daniel Pearson; ausnog-bounces at lists.ausnog.net; AusNOG at lists.ausnog.net
Subject: Re: [AusNOG] /16 for sale.... well not really but why not!





----- Original Message -----
> From: Alastair Johnson <aj at sneep.net>
> To: Daniel Pearson <dpearson at pingco.com.au>; ausnog-bounces at lists.ausnog.net; "AusNOG at lists.ausnog.net" <AusNOG at lists.ausnog.net>
> Cc: 
> Sent: Friday, 25 January 2013 5:06 PM
> Subject: Re: [AusNOG] /16 for sale.... well not really but why not!
> 
> Luckily the value will spike and then drop, so they better time it right.
> 

If an ISP implements CGN with the ideal sharing ratio of 2 subscribers to 1 IP address (to give the subscribers the most possible ports), an ISPs requirement for public addresses for those subscribers halves. What are they going to do with those excess addresses? If they sell them, then I agree, the value will drop.

Consider Telstra with 2.4 million wired broadband residential customers, which I assume all have individual public IP addresses. In theory with a 2 to 1 CGN deployment, they now have 1.2 million excess addresses. If they kept 300 000 for their own future use, they could sell the remaining 900 000.

I think it would be best to minimise the number of subscribers to IP addresses in a CGN deployment, which why I'd deploy 2:1. However, it seems common for people to talk about 8:1 or even 16:1. If Telstra chose to adopt 8:1, they'd "free up" 2.1 million addresses. In addition to being able to sell them, another financial incentive to giving them up would be a reduction in RIR fees. 

I've wondered in the past if there is or should be an APNIC policy to reclaim addresses that become unused when an ISP deploys CGN. 

> -----Original Message-----
> From: Daniel Pearson <dpearson at pingco.com.au>
> Sender: ausnog-bounces at lists.ausnog.net
> Date: Fri, 25 Jan 2013 05:58:53 
> To: AusNOG at lists.ausnog.net<AusNOG at lists.ausnog.net>
> Subject: [AusNOG] /16 for sale.... well not really but why not!
> 
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