Re: issue #16

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Jari Arkko wrote:
| Joe Touch wrote:
|
|> Internet paths that are silent aren't problems, IMO. They're just idle
|> network paths.
|
| Yes.
|
|> This sounds like a job for a link layer, and I don't think mobike needs
|> to be a link layer.
|
| The link layer certainly has its own mechanisms, as does IP on
| top of it (e.g. IPv6 NUD). But these are for a link, what we are
| talking about here is a path through the Internet. More specifically,
| the question is what to do if IKEv2 DPD tells us that its not getting
| through. Should we (a) kill the connection or (b) switch to another
| address we have? I think the latter...

Links already react to things coming up and down. Routing already moves
things around links that disappear. The key question is whether IKE
should be doing something directly involving different addresses. That
starts sounding like a routing  or link management protocol, and can
(and will) interact with link or routing adjustments.

While I appreciate that IKE should retry, or allow reconecting, which
could involve different addresses (i.e., different source address used
on retry/restart), managing the addresses seems like it should be a
side-effect of the restart (leave the source address blank, let it be
filled in on exit) rather than explicitly managed. The latter is asking
for interaction with link/routing reconfiguration, in a bad way, IMO.

Joe
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