Christian: Thanks for the clarification. Please see inline for a few comments
On Fri, 29 Aug 2003, Christian Huitema wrote: > > Additionally, let us postulate that all three entities have a small > > population of hosts which must be accessible from the public networks, > and > > that those hosts must also be reachable from the local private > network. > > The plan of record is that these publicly reachable hosts will have both > a local address and a global address. The global address will be derived > from a prefix announced by the ISP. > Yes, that is consistent with my interpretation. Even where this is the case, however, the hosts and the routers in the local environment would have knowledge of the global routes (perhaps a default only for most devices) and the unique-local routes advertised into the local routing domain. The routers are likely to distribute all known prefixes, including those which cross the site boundaries. > > Unless I have missed some essential clause in your description above, > we > > appear to have a failure mode, with a root cause of user neglect or > user > > error, in which the non-propagation requirement for unique-local > prefixes > > to the global routing table is likely to be violated. > > Stuff happens. However, one ISP making a mistake does not have to > endanger the whole Internet. Any good ISP is suppose to filter routes in > the FC00::/7 prefix from its own BGP announcements, and to ignore prefix > in the FC00::/7 range that peer ISP might mistakenly advertise. > > -- Christian Huitema > Yup, you're absolutely right. Perhaps we don't need the route black hole after all, provided that the network administrators execute their tasks fully and consistently. I wonder what the rest of the group think. I'm going to shut up for a while and let some others get a word in. Pekka? Tony? Ralph? Regards, AEB -- Alan E. Beard <[EMAIL PROTECTED]> AEBeard Consulting; 4109 Chelsa Ln; Lakeland FL 33809 863.815.2529 -------------------------------------------------------------------- IETF IPng Working Group Mailing List IPng Home Page: http://playground.sun.com/ipng FTP archive: ftp://playground.sun.com/pub/ipng Direct all administrative requests to [EMAIL PROTECTED] --------------------------------------------------------------------
