Re: [BEHAVE] Home NAPT44 - How many ports?

"Reinaldo Penno (repenno)" <repenno@cisco.com> Wed, 05 June 2013 16:28 UTC

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From: "Reinaldo Penno (repenno)" <repenno@cisco.com>
To: Michael Richardson <mcr+ietf@sandelman.ca>, "v6ops@ietf.org" <v6ops@ietf.org>
Thread-Topic: [BEHAVE] Home NAPT44 - How many ports?
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Date: Wed, 5 Jun 2013 16:27:59 +0000
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Cc: "Softwires-wg list \(softwires@ietf.org\)" <softwires@ietf.org>, "Poscic, Kristian \(Kristian\)" <kristian.poscic@alcatel-lucent.com>, "behave@ietf.org" <behave@ietf.org>, "Erik Kline \(ek@google.com\)" <ek@google.com>, "Rajiv Asati \(rajiva\)" <rajiva@cisco.com>
Subject: Re: [BEHAVE] Home NAPT44 - How many ports?
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On 6/5/13 1:23 PM, "Michael Richardson" <mcr+ietf@sandelman.ca> wrote:

>
>>>>>> "repenno" == repenno  <Reinaldo> writes:
>    repenno> On the other hand, as Rajiv captured,the number of
>    repenno> UDP sessions can be much larger than the number of
>    repenno> TCP. Because the way
>    repenno> dynamic webpages are constructed today, there are sometimes
>    repenno> literally 100s
>    repenno> of DNS requests to download a single page.
>
>If one is doing CGN, wouldn't it be reasonable to point customers' at
>a recursive DNS server with an interface inside the CGN?

Yes. That's what I suggest. But some people use, say, Google's
DNS/OpenDns/etc and in some other cases the network is not setup correctly.

>
>This seems to also suggest that having a *caching* recursive DNS(SEC,
>HOMENET+, mDNS+) server inside the customer router is also a big win.

Yes, it is.

>
>-- 
>]               Never tell me the odds!                 | ipv6 mesh
>networks [ 
>]   Michael Richardson, Sandelman Software Works        | network
>architect  [ 
>]     mcr@sandelman.ca  http://www.sandelman.ca/        |   ruby on rails
>   [ 
>