On Mon, Nov 12, 2001 at 08:20:28PM +0000, Ben Clifford wrote: > On Mon, 12 Nov 2001, Bernd Walter wrote: > > > If you are connecting networks with unco-ordinated addresses you are > > calling for troubles. > > But this is what happens with link-local addresses.
Link local address are automaticaly co-ordinated. If you receive a connect - how would you know on which interface to send the answer back? OK - you can remember the interface from which you got the request, but this requires symetric routes. With link local you know for shure its symetric because it came via a direct connection. With site local you never know. > > IP Packets should never leave their area of validity which is what > > you are doing in your example. > > I am not suggesting routing packets from one site to another - I am just > saying that a particular machine may be connected to multiple sites > (without routing packets between those sites). Well site local addresses are defined to be fec0::/10. Lets say each site has enough with /48 and the leaving 38 bits are filled with a site specific random value. If you are ever in need to connect to another site you have a (2^38)-1 : 1 chance that you don't collide. If you don't do you shouldn't be surprised some day. After all you can always renumber. If you are in need for such a hack it's a good sign for a bad network design. The correct answer is to fix the bad design instead of working around. -- B.Walter COSMO-Project http://www.cosmo-project.de [EMAIL PROTECTED] Usergroup [EMAIL PROTECTED] --------------------------------------------------------------------- The IPv6 Users Mailing List Unsubscribe by sending "unsubscribe users" to [EMAIL PROTECTED]
