Re: DoCoMo Implementation Issues with CTP

> >
> > I understand your point, but
> > I request you to explain how the implementation should be
> > in the following scenario ?
> >
> > When MN moves, MN sends CTAR to nAR,
> > nAR needs to extract IP information from CTAR and send a CTREQ to oAR.
> > When both(IPv4 & IPv6) are present in CTAR, What is the behaviour of nAR
?
> >
>
> In CTREQ, set `V' to 10, include both IPv4 and IPv6 addresses in
> "Mobile Node's Previous IP Address" field, construct
> IP Dest = PAR's IP (v4 _or_ v6) address provided in CTAR
> IP Src = NAR's IP (v4 or v6) address.
>
IP Dest is the confusing part, I guess clarification in the draft, helps.

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 ?


> 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.

regards,
Raghu