Can you share your cost comparison?
If I assume the IPv4 purchased addresses will be useful for the next 15+ years
they do make a ton of sense. Estimating the amount of traffic 5+ years from
now is not something I have high confidence in. Making predictions is hard,
especially about the future.
What kind of IPv4/IPv6 traffic ratio's should we expect 5-15 years from now? I
assume there is no simple answer for this.
An ISP with mostly enterprise customer's would expect different assumptions
from a mobile phone provider. This may be one of those times where every
answer is correct, just not for everyone. The whole "one size fits some" kind
of solution.
Kevin Burke
802-540-0979
Burlington Telecom
200 Church St, Burlington, VT
On 3/1/21, 2:38 PM, "NANOG on behalf of Jared Brown"
<nanog-bounces+kburke=burlingtontelecom....@nanog.org on behalf of
nanog-...@mail.com> wrote:
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Kevin,
One of the presented options isn't like the others. As such the comparison
isn't really fair, especially if you expect to run your business longer than 7
years.
If you buy more IPv4 space you will neither have to deal with CGNAT nor
worry about traffic growth. Both of those benefits are easily worth the (short
term) premium.
In the long term, buying more IPv4 blocks now is likely to be cheaper than
running CGNAT for the foreseeable future.
To echo Owen, in general, the economics today still work out to make
purchasing addresses more favorable than CGNAT.
- Jared
Sent: Tue Feb 2314:36:48 UTC 2021
From: Kevin Burke kburke at burlingtontelecom.com
To: nanog@nanog.org
Subject: Re: CGNAT
We are looking at implementing a similar solution with A10 for CGNAT.
We've been in touch with A10. Just wondering if there are some alternative
vendors that anyone would recommend. We'd probably be looking at a solution to
support 5k to 15k customers and bandwidth up to around 30-40 gig as a starting
point. A solution that is as transparent to user experience as possible is a
priority.
The numbers below are for a similar target of subscriber’s and peak
bandwidth.
We assumed a couple of numbers:
Current Peak Bandwidth = 40G
Remaining IPv4 traffic after migration = 20% (Seen references to 10% or 20%
on this forum)
Future Bandwidth Growth = 2x (no data behind this assumption)
Future CGNAT’ed bandwidth = 15Gbps
Equipment & budget lifecycle = 7Yr
Getting that data led us to this price comparison:
Solution
Lifecycle/ Term
Annual Cost/Sub
Product Lifecycle Cost/Sub
Lease IPv4 Cogent
7
$ 4.45
$ 31.13
A10 CGNAT 15Gb 7Yr
7
$ 1.21
$ 8.47
A10 CGNAT 40Gb 7Yr
7
$ 1.95
$ 13.68
Purchase @ $25 7Yr
7
$ 3.57
$ 25.00
The current plan is implement an A10 CGNAT solution after upgrading our
network for IPv6. In the interim we will have to lease IPv4 to tide us over.
I would be curious to see what other’s estimate the costs of various
approaches. Feel free to ping me off-list for more specific numbers.
Kevin Burke
802-540-0979
Burlington Telecom
200 Church St, Burlington, VT
