Re: [OPSAWG] Fwd: I-D Action: draft-nishizuka-cgn-deployment-considerations-00.txt

[kaname nishizuka <[e-mail]>]

Shishio-san
Thanks,

In response to your questions,

> http://tools.ietf.org/html/draft-nishizuka-cgn-deployment-considerations-00#section-4
> Figure 1: The number of sessions of applications.
>
> Q.Which browser did you use in your investigation?
We used the latest Chrome and FireFox.

> Our investigation shows that the average number of session of active subscriber is 400.
>
> Q.Can you show more detail information? The investigation in the commercial network? or test bed?
We captured traffic of our normal activities. So the answer is "in test 
bed".
In a commercial network, the common people activities could be somehow 
different from researchers:)
However, the existing study is showing that our assumption is not extreme.
http://www.wand.net.nz/~salcock/someisp/flow_counting/result_page.html

> http://tools.ietf.org/html/draft-nishizuka-cgn-deployment-considerations-00#section-5.2
> (a) was estimated to be 25% at the value during the busy hour of traffic (21:00 pm to 1:00am).
>
> Q.Does the estimation come from your investigation on real network? or erlang and someting?
>   What kind of network?Wireless or Wireline?IPv6 enabled network?
It's from investigation on the real ISP network.
It's mainly wireline network and partly IPv6-enabled.


> http://tools.ietf.org/html/draft-nishizuka-cgn-deployment-considerations-00#section-6.1
>
> Q.Is current RFC not enough to measure CGN performance?
> RFC 3511 Benchmarking Methodology for Firewall Performance
> http://tools.ietf.org/html/rfc3511
> RFC6645 IP Flow Information Accounting and Export Benchmarking Methodology
> http://tools.ietf.org/html/rfc6645
>
Maybe not, though I've not closely read them.
As I described in the draft, the CGN performance is limited by the 
combination of throughput, Max Concurrent Sessions and Connection Per Sec.
Thus we used the test bed(StarBED) with powerful calculation power to 
emulate all subscribers.
The assumption of the average subscriber was important for setting up 
the environment.

Best regards,
kaname

(2013/04/05 16:02), Shishio Tsuchiya wrote:
> I read this documents.
> I think this draft would be useful to consider CGP deployment for service providers.
>
> And I have question.
> http://tools.ietf.org/html/draft-nishizuka-cgn-deployment-considerations-00#section-4
> Figure 1: The number of sessions of applications.
>
> Q.Which browser did you use in your investigation?
>
> Our investigation shows that the average number of session of active subscriber is 400.
>
> Q.Can you show more detail information? The investigation in the commercial network? or test bed?
>
> http://tools.ietf.org/html/draft-nishizuka-cgn-deployment-considerations-00#section-5.2
> (a) was estimated to be 25% at the value during the busy hour of traffic (21:00 pm to 1:00am).
>
> Q.Does the estimation come from your investigation on real network? or erlang and someting?
>   What kind of network?Wireless or Wireline?IPv6 enabled network?
>
> http://tools.ietf.org/html/draft-nishizuka-cgn-deployment-considerations-00#section-6.1
>
> Q.Is current RFC not enough to measure CGN performance?
> RFC 3511 Benchmarking Methodology for Firewall Performance
> http://tools.ietf.org/html/rfc3511
> RFC6645 IP Flow Information Accounting and Export Benchmarking Methodology
> http://tools.ietf.org/html/rfc6645
>
> Regards,
> -Shishio
>
> -------- Original Message --------
> Subject: I-D Action: draft-nishizuka-cgn-deployment-considerations-00.txt
> Date: Thu, 28 Mar 2013 07:12:24 -0700
> From: <[e-mail]>
> Reply-To: <[e-mail]>
> To: <[e-mail]>
>
>
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
>
>
> 	Title           : Carrier-Grade-NAT (CGN) Deployment Considerations.
> 	Author(s)       : Kaname Nishizuka
> 	Filename        : draft-nishizuka-cgn-deployment-considerations-00.txt
> 	Pages           : 16
> 	Date            : 2013-03-28
>
> Abstract:
>     This document provides deployment considerations for Carrier-Grade-
>     NAT (CGN) based on the verification result include the investigation
>     of the number of sessions of applications.  The verification was
>     conducted in StarBED which is one of the largest scale network
>     experiment environment in Japan.  A million of subscribers was
>     emulated and it revealed the realistic behavior of CGN.
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-nishizuka-cgn-deployment-considerations
>
> There's also a htmlized version available at:
> http://tools.ietf.org/html/draft-nishizuka-cgn-deployment-considerations-00
>
>
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>
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> .
>
>
>
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-- 
----
Kaname Nishizuka
Innovative Architecture Center
NTT Communications Corporation
[phone]