nanog mailing list archives

Re: shim6 @ NANOG (forwarded note from John Payne)


From: Michael.Dillon () btradianz com
Date: Thu, 2 Mar 2006 13:49:20 +0000


Putting the routing decisions in the hands of the servers(that we do 
not control) requires that we somehow impart this routing policy on 
our customers, make them keep it up to date when we change things, 
and somehow enforce that they don't break the policy.

The same problems exist, on a smaller level, on enterprise networks. 
Routing policies can be complex, requiring information that isn't 
currently visible to end hosts, that changes frequently, and can be 
very costly if anyone ignores the policy. Under current BGP-style 
decisions-at-the-edges networking, it's impossible for an end user or 
server to ignore routing policy. 

Clearly, it would be extremely unwise for an ISP or
an enterprise to rely on shim6 for multihoming. Fortunately
they won't have to do this because the BGP multihoming
option will be available.

I just don't think it's a solution for everyone.

It may never be a solution for anyone.

--Michael Dillon


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