Re: failure detection

[Erik Nordmark <erik.nordmark@sun.com>]

marcelo bagnulo braun wrote:

> I agree that using the "preferred lifetime" for signaling that a prefix 
> is no longer working would imply to change the meaning of the field, but 
> wouldn't it be possible to use the "valid lifetime" (set to zero) to 
> inform the hosts that a prefix is no longer available?

If you have non-shim6 hosts, then a valid lifetime set to zero might 
mean that they'll immediately terminate any tcp connections that use 
that prefix. I don't think we want to do that, because packets might 
start flowing again before e.g., TCP gives up.

So I think that if we are going to add an indication that a prefix isn't 
working, so that shim6 hosts can change the locator they use more 
quickly, we should add a new indication and not overload an existing one 
to have these semantics.

   Erik