randy,

I know how this must work and its even more horrifying than you might imagine.

What you have to do in a nutshell is add tons of context and management to the 
implementation to note the boundaries and then the sub-boundaries as you can have in 
the future org-scope, or dept-scope and on and on.  Its insane to keep this in the 
architecture.  And NO ONE has it working and the code to be removed is insignificant. 
As Jinmei pointed out with the API as one example.

yes we have to manage more state with anycast but that is minimal and well defined. 
that is good and ok.

Also this is not the case for link-local.  The reason is that the links are hardwired 
in the implementation and treating them as zones works for links.  But sites are 
"virtual".

The entire use of them is bogus IMO.

/jim

> -----Original Message-----
> From: Randy Bush [mailto:[EMAIL PROTECTED]]
> Sent: Monday, June 10, 2002 7:07 AM
> To: Francis Dupont
> Cc: Steven M. Bellovin; [EMAIL PROTECTED]
> Subject: Re: Fwd: IPv6 Scoped Addresses and Routing Protocols 
> 
> 
> >> But as site is rather vaguely defined, I think many 
> vendors just skip
> >> this little detail..
> > I disagree: we have a similar but more complex issue for multicast
> > forwarding and the zone boundary check is very easy to implement
> 
> cool.  how do you detect that you are at the edge of a site?
> 
> randy
> 
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