On Thu, 17 Jul 2003, Thomas Narten wrote: > Pekka Savola <[EMAIL PROTECTED]> writes: > > > RFC2461 discusses that next-hops must be on-link. > > > However, section 8 on redirect basically requires: > > - routers know each others' link-local addresses (not an issue from > > hosts' perspective, just use routing protocols or other mechanisms) > > - hosts are able to verify that the redirect comes from the link-local > > address the host is currently using as its next-hop > > As I recall, routers use LL addresses in RAs for source addresses to > avoid aliasing problems. If a router has multiple addresses (and if > those addresses change over time, e.g., as a result of renumbering) a > host could get confused and think there were (say) two routers on the > link when the two were really the same. [...]
Yes, routers use LL as source addresses. So, basically you could specify that, like, when you discover the L2 address of your router, you'll record it's source address somewhere (to be used when redirects arrive). (you don't even have to wait for RA's I think) -- Pekka Savola "You each name yourselves king, yet the Netcore Oy kingdom bleeds." Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings -------------------------------------------------------------------- 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] --------------------------------------------------------------------
