On Mon, 2 Dec 2002, Margaret Wasserman wrote: > If we limit site-locals to this case, they can be treated _exactly_ like > globals in all implementations (since they will be global to any network > where they should be used), and all BGP routers could ship with a default > filter to block propagation of these routes (which the administrator > would have modify in the unlikely event that he wanted to use BGP in > his completely isolated network).
I don't think site-locals are special enough to be specifically disallowed by default in BGP. > I'm working on a draft that explains why I believe that site-locals > need to be limited to this extreme, and that draft will provider further > details of the proposal. I'm actually NOT proposing any automatic > mechanism to enforce this restriction, as I just think that makes > implementations larger and more cluttered. > > This was the "limited usage" model discussed at the Atlanta meeting. > > There was also a "moderate usage" proposal put forth by Bob Hinden in > the meeting, which would allow the use of site-local, but would not > allow sites to border each other (site-local addresses would be > filtered in firewalls). The details of this model haven't been > documented in detail, but it has the advantage that it would allow > the use of site-locals on intermittently connected networks (ones that > may not always have global addresses available from their ISP, or where > their ISP-provided addresses may change on each connection). > > The WG had consensus to limit the use of site-locals to one of these > two proposals, but we were pretty much split down the middle between > them. One of the issues, I think, is that neither one was well-enough > documented for people to understand the details. So, I'm working on > documentation for the "limited usage" proposal. > > Bob, are you or anyone else working to document the "moderate usage" > proposal? > > Margaret > > > > > > > > -------------------------------------------------------------------- > 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] > -------------------------------------------------------------------- > -- Pekka Savola "Tell me of difficulties surmounted, Netcore Oy not those you stumble over and fall" Systems. Networks. Security. -- Robert Jordan: A Crown of Swords -------------------------------------------------------------------- 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] --------------------------------------------------------------------
