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

Cameron Byrne <> Fri, 17 June 2011 17:17 UTC

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Date: Fri, 17 Jun 2011 10:17:07 -0700
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From: Cameron Byrne <>
To: Dave Thaler <>
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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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On Fri, Jun 17, 2011 at 10:04 AM, Dave Thaler <> 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

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.