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Re: shim6 (was Re: IPv6 news)

  • From: Christopher L. Morrow
  • Date: Sat Oct 15 00:04:04 2005

On Fri, 14 Oct 2005, David Conrad wrote:
> Joe (or anyone else),
> On Oct 14, 2005, at 7:57 AM, Joe Abley wrote:
> > The big gap in the multi-homing story for v6 is for end sites,
> > since those are specifically excluded by all the RIRs' policies on
> > PI addressing right now. Shim6 is intended to be a solution for end
> > sites.
> Since shim6 requires changes in protocol stacks on nodes, my
> impression has been that it isn't a _site_ multihoming solution, but
> rather a _node_ multihoming solution.  Is my impression incorrect?

that is my read as well... I'd bet it'll be fun with uRPF strict on sites
that are /multihomed/ though still staticly routed :)

> > Are you suggesting that something else is required for ISPs above
> > and beyond announcing PI space with BGP, or that shim6 (once baked
> > and real) would present a threat to ISPs?
> If my impression is correct, then my feeling is that something else
> is required.  I am somewhat skeptical that shim6 will be implemented
> in any near term timeframe and it will take a very long time for
> existing v6 stacks to be upgraded to support shim6.  What I suspect
> will be required is real _site_ multihoming.  Something that will
> take existing v6 customer sites and allow them to be multi-homed
> without modification to each and every v6 stack within the site.

you've hit a nail on it's head.