Re: Next question...

[Brian E Carpenter <brian@hursley.ibm.com>]

Policy is certainly not static, but I was trying to keep
my brain clear of specific solutions.

   Brian

Aldrin Isaac wrote:
> 
> % From: owner-multi6@ops.ietf.org [mailto:owner-multi6@ops.ietf.org]On
> % Behalf Of Brian E Carpenter
> %
> % I'd say yes, for some definition of policy we need policy control,
> % and it needs to be global rather than per-host.
> %
> % OTOH I wouldn't exclude that the actual *enforcement* of the policy
> % happens in the hosts, under a site-wide policy broadcast in some
> % way.
> %
> 
> If you are referring to broadcasting policy that governs source
> address selection corresponding to destination address(es), then I
> don't see how source address selection can *also* be made to
> correspond to the *current* ISP (i.e. expect it to change) towards
> that destination.  Unless, of course, this policy is not static but
> somehow consists of learning from the network, in which case network
> controls would seem to be sufficient.
> 
> -- aldrin