The short answer is that that is what Linux/MIPL does.  We haven't changed
anything.
The slightly longer answer is that RFCs2461/2462 describe how prefixes are
advertised with a valid lifetime
and that addresses take on that lifetime and can be used until that lifetime
expires.  RFC2461 specifically describes the case where a laptop is
unplugged and is entitled to use its previous address when plugged in again.
The default value for lifetimes is 30 days and infinity is a valid value.

Richard.

----- Original Message -----
From: "Alper E. YEGIN" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; "Richard Nelson"
<[EMAIL PROTECTED]>
Cc: "Thomas Narten" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Saturday, October 12, 2002 4:15 AM
Subject: Re: Changing RS Reply Timing for Mobile IPv6


> Greg,
>
> > I'd just like to indicate that we have seen the delay
> > for router advertisement to be a significant delay
> > in MIPv6 handovers, since there is no DAD in the case
> > where a mobile node moves back to a previously visited
> > network.
>
> How is that so? Of course the chances of some other
> node claiming your node's IP address while it's gone
> are even less, but still it is not impossible. So, you can
> choose to not use DAD by taking this risk... Is this what
> you mean?
>
> alper
>
>

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