Re: Handling rogue RA feedback

[JINMEI Tatuya / 神明達哉 <jinmei@isl.rdc.toshiba.co.jp>]

At Wed, 25 Jul 2007 08:07:04 +0900 (JST),
itojun@itojun.org (Jun-ichiro itojun Hagino) wrote:

> > One thing that annoys me to no end is that if router X sends out  
> > prefix A::/64 and router Y sends out B::/64, then node 1 will happily  
> > configure addresses A::1 and B::1, and then send out packets with  
> > source address A::1 over router Y. This is really a bad thing for  
> > efforts like shim6.
> 
> 	first of all, the above configuration violates RFC.  all routers has
> 	to be configured with consistent RA parameters iirc.

(A very minor comment that is not related to the main point of this
thread)
This is not really correct: the specification allows router X to send
out A::/64 (and only this one) and router Y to send out B::/64 (and
only this one).  See Section 6.2.7 of RFC2461:

   Note that it is not an error for different routers to advertise
   different sets of prefixes.  [...]

(This isn't going to be changed in 2461bis for that matter).

					JINMEI, Tatuya
					Communication Platform Lab.
					Corporate R&D Center, Toshiba Corp.
					jinmei@isl.rdc.toshiba.co.jp