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

[Dave Thaler <[e-mail]>]

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.

-Dave