RE: [mobile-ip] Re: FW: I-D ACTION:draft-tsirtsis-dsmip-problem-0 0.txt

[Soliman Hesham <H.Soliman@flarion.com>]

 > On Mon, 25 Aug 2003, Soliman Hesham wrote:
 > >  > >  > So, it seems pretty reasonable to expect many (most?) 
 > >  > > 
 > >  > > => More like "none" than "most". Even if they implement
 > >  > > it, the encapsulation is normally done in the FA otherwise
 > >  > > the local domain's ingress filter will drop the packets.
 > >  > 
 > >  > Have you even ever deployed MIPv4?  MN would encapsulate 
 > >  > packets using its
 > >  > care-of address, and local domain's ingress filter would 
 > >  > certainly NOT
 > >  > drop those packets.  Or what are you referring to?
 > > 
 > > => Have you read RFC 3220? 
 > 
 > No.

=> Then it's more productive to delay this discussion till you
do. 

 > 
 > > Which CoA are you referring to?
 > > When you have an FA (almost always) the MN doesn't get a 
 > > colocated CoA. Please read 3220.
 > 
 > I'm referring to the local address (obtained e.g. through 
 > DHCP) configured 
 > on the mobile node, whether given by FA or not.

=> When you read the RFC you will see that if an FA exists
and is used as a CoA by the MN there is NO COA from DHCP.
The rest of the comments below do not apply to MIPv4 as we 
know it in 3220 unless you have colocated CoAs. I have yet to
see any serious deployment/standards (3GPP2, 3GPP, our (Flarion) young
cellular link layer ...etc) that deploys MIP without an FA.
I don't know where you refer to by "here" below.

Hesham

 > 
 > That seems to be the only reasonable way to deploy Mobile 
 > IP, as you can't
 > be sure that the hosts implement or enable Mobile IP (so you 
 > will have to
 > provide DHCP service giving local addresses), and you can't 
 > be sure the
 > routers implement Mobile IP (so the hosts have to be able to reverse
 > tunnel back to HA).
 > 
 > That's how Mobile IP is deployed here, and works.
 > 
 > You probably have some specific specialized networks in mind.
 > 
 > -- 
 > Pekka Savola                 "You each name yourselves king, yet the
 > Netcore Oy                    kingdom bleeds."
 > Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
 > 
 >