> I'm sorry, I must describe more to complete the scenario. > > From: Keiichi SHIMA / 島慶一 <[EMAIL PROTECTED]> > > > > => Technically, removing the must on the HAO is not a problem. > > > In fact, regardless of deployed base, keeping a must for > > > the HAO makes no sense IMHO. > > > As for the BE message, I guess we need to make sure that > > > somehow the CN tells the MN that no binding exists. > > > Not sure what can be done about this. > > > > If the CN supports mip6, the CN will send a BE message when it > > receives a packet which has HAO and it doesn't have a > BCE. If the CN > > doesn't support mip6, the CN will send an ICMP PRAMPROB > with code 2 > > based on the ICMPv6 specification. > Also, if the CN doesn't support mip6 and receives MH (ex. > HoTI/CoTI), > the CN will send ICMP PARAMPROB with code 1 based on the ICMPv6 > specification. > > > When the MN receives a BE message, the MN will re-start > RR procedure. > > When the MN receives ICMP PARAMPROB with code 2 and the pointer > > indicates HAO, the MN will switch to use bi-directional tunneling. > When the MN receives ICMP PARAMPROB with code 1 and the pointer > indicates MH, the MN will switch to use bi-directional tunneling. > > > Is there any other scenarios? Please correct me if the > above rules > > are not enough to support non-mip6-aware IPv6 nodes.
=> You're right, provided that we got the right option type value for the HAO (can't remember but it should be ok) so that the CN drops the packet if there is a HAO. For others who are not up to date on the MIPv6 spec, the HAO is only accpeted by the CN if RO is used or the packet is protected with IPsec. Otherwise reverse tunelling is used. So the norm is reverse tunnelling. That's why I don't think the HAO needs to be mandated. Hesham -------------------------------------------------------------------- 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] --------------------------------------------------------------------
