> -----Original Message-----
> From: Dave Thaler
> Sent: Tuesday, September 18, 2001 10:22 AM
> To: Erik Nordmark
> Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED]
> Subject: RE: uni-based-mcast and malloc-ipv6-guide
>
> Erik Nordmark asks:
> > I fail to understand why routing might fail. Could you explain?
> > I do understand that there is a different probability of allocating
> > duplicate
> > uni-based mcast addresses should the unicast prefix be assigned to
> another
> > entity, but this doesn't lead to routing failing unless you are
> assuming
> > that routing will do something it doesn't currently do.
>
> Just like providers do source ingress filtering, there might be
> something similar that providers would do here. (Maybe, maybe not.)
Another example would be if uni-based mcast prefixes are used
with BGMP, or any other scheme, to locate the root (domain) of the
multicast tree without doing anything different in BGP. If the
domain loses its old unicast prefix, after which it's advertised
by no one, then the derived multicast addresses would similarly
be (intentionally) unusable inter-domain.
-Dave
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