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Re: [Pppext] [Int-area] IETF80 questions regarding "On demand IPv4 address provisioning in Dual-Stack PPP deployment" - Topic for WG?

Joshua Shire <jshire@hyduke.com> Fri, 17 June 2011 17:31 UTC

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From: Joshua Shire <jshire@hyduke.com>
To: Cameron Byrne <cb.list6@gmail.com>, Dave Thaler <dthaler@microsoft.com>
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Cc: pppext@ietf.org, int-area@ietf.org
Subject: Re: [Pppext] [Int-area] IETF80 questions regarding "On demand IPv4 address provisioning in Dual-Stack PPP deployment" - Topic for WG?
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I'll second this. Most of the new SMB level gateway devices we're seeing on the market support some type of USB connected 3G/HSPA dial-on demand system as a backup link. We've implemented it quite extensively with little to no problems.

Josh

-----Original Message-----
From: int-area-bounces@ietf.org [mailto:int-area-bounces@ietf.org] On Behalf Of Cameron Byrne
Sent: Friday, June 17, 2011 11:17 AM
To: Dave Thaler
Cc: pppext@ietf.org; int-area@ietf.org
Subject: Re: [Int-area] IETF80 questions regarding "On demand IPv4 address provisioning in Dual-Stack PPP deployment" - Topic for WG?

On Fri, Jun 17, 2011 at 10:04 AM, Dave Thaler <dthaler@microsoft.com> wrote:
> Mark Townsley wrote:
> [...]
>> Applications may not be all that forgiving to IPv4 coming and going either, e.g.,
>> I have a popular mail client that has recently taken to crashing when I switch
>> from wired to wireless and get a different IP address in the process. Some of
>> the IM connections I keep up recover quickly to IP changes, others do not. The
>> IETF has a whole WG (DNA) dedicated to this tricky behavior of an IP address
>> coming and going - it's not always easy, in particular when the link-layer is not
>> giving your IP stack any up/down notification, which I believe by definition is
>> what your proposal requires from the very start.
> [...]
>
> I'll second the above.   This is very problematic for some applications.
> (Other solutions like DSTM that have on-demand IP addresses have this same issue.)
>
> So any network that deploys such a solution in anything other than
> a tightly controlled environment where directly connected nodes are restricted
> to a specific set of pre-tested applications, will likely result in many support calls.
>

Is this really different from the dial-on-demand routing that has
existed for years and still exist as  common backup connectivity
technique?

I assume that this would be implemented on an Home Gateway which
provides consistent addressing to IPv4 hosts within the home, and
dial-on-demand type mechanism request the IPv4 address to the home
gateway to do NAT44 in the event of an IPv4 stream arrives.


Cameron
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