Interim Policy proposal for IPv6 Address Assignment Policy for Internet Exchange Points

> For a traceroute *through* the IX you don't need the route to that /64.  
> It might get filtered if you do RPF filtering (but multihomed customers
> usually don't, because it doesn't work), [...]

The less-strict "reachable-via-any" (I forget its exact syntax, but
should be usable by multihomed sites) unicast RPF checking will however
also break the traceroute if the /64 isn't announced as reachable in the
DFZ.

Regards,

- Håvard