Re: DoCoMo Implementation Issues with CTP

> > Question based on your suggestion,
> > When Context trigger is generated, pAR sends PCTD to nAR.
> > Let us say,
> > IP Dest = NAR's IP (IPv4) is used and
> > IP Src = PAR's IP  (IPv4) is used to send PCTD to nAR
> >
> > When MN sends CTAR with PAR= IPv6 to nAR,
> > How does nAR verify and enable the contexts ?
> >
> 
> Well, CTAR includes MN's IP(v4,v6) addresses. So does
> PCTD. So, nAR can still match the contexts. Since the token
> does not include PAR's address, verification can still be
> done.
> 
I think I didnot make my point clear.
MN is claiming that it came from one pAR IP Address(IPV6),
but the nAR has a PCTD that says pAR IP is different(IPv4),
How can nAR verify the Token without matching the pAR IP ?

> >
> > > Is the confusion in whether `V' bits also refer to
> > > PAR and NAR addresses ? If so, we should clarify that they
> > > refer to MN's IP addresses only, and that the router address
> > > must be either IPv4 or IPv6 but not both.
> > >
> > This description in the draft may clarify things, but how to
> > identify the IP version AR in CT messages.
> > I guess another V flag for AR might simply things.
> >
> 
> Perhaps this is not necessary. (See above)
>
I mean,
In CTAR Message there is pAR IP,
how can nAR know that there is IPv4 or IPv6 address of pAR,
if the V flag is only for MN IP version.


regards,
Raghu