Subject: Re: [nemo] comments on draft-wakikawa-nemo-basic-00.txt

From: Vijay Devarapalli <[email-masked]>
Date: Fri, 14 Mar 2003 17:11:24 -0800

Ryuji Wakikawa wrote:
> 
> Hello Alex.
> 
> > Maybe you have a more detailed view on how HA intercepts packets
> > destined to the registered mobile network prefix.  Is it something
> > like HA snoops at those packets?  Or is it more like HA uses
> > unsolicited broadcasted NA to pretend having MNN's L3 address?
> 
> Since HA is an end-router for the prefix on the Internet
> (i.e. advertising mobile network prefix by routing protocol), HA will
> receive all packets destined to a mobile network prefix. During IP
> forwarding procedure, HA looks up binding cache and finds a prefix
> binding. Therefore, HA can tunnel all these packets to MR.

I dont agree with this. I think it is wrong to assume that
packets meant for the mobile network will always reach the
the HA which has the prefix scoped binding cache entry. you
could have a border router in the home link which could 
receive the packets meant for the mobile network.

if you want the border router to forward the packets to the
HA, it needs to know that the HA can reach the mobile router.

Vijay