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Re: [LUG] The rationale behind dynamic IP addresses (was: Your ISP - and IPv6)

 

On Fri, Jul 5, 2013 at 10:27 PM, Julian Hall wrote:
> It could be simply that it would be more expensive for them.  Say you had 2
> million customers all with static IPs, you'd have to buy a big enough block
> of IPs so they could have one each.  If on the other hand you knew from
> servers logs etc that the most you'd ever had online at the same time was
> 500,000 you could get away with a block of say 600,000 to give yourself a
> bit of leeway and save on the big block expense.

This would be a valid argument, if it weren't for the fact that - as
bad apple has pointed out - most people are online most of the time.
So out of your 2m customers, you'd have 1.8m online most of the time
and with a bit of leeway, you'll end up having to buy a block of 2m
addresses

One advantage with dynamic IP addresses (apart from their ability to
'solve' problems) is that it makes mergers or take-overs easier: you
can simply redistribute the new pool of addresses in a more efficient
way.

Martijn.

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