[Mip4] Pre-Registration Request routing issue in Low Latency Handoffs in Mobile IPv4 Draft --

Hi Karim, 

This is regarding the method of handling Pre-Registration request by oFA
in the Low Latency Handoffs in Mobile IPv4
<http://www.ietf.org/internet-drafts/draft-ietf-mobileip-lowlatency-hand
offs-v4-11.txt>  Internet Draft. According to me, the way it is handled
by the draft might have a problem as follows: 

Pre-Registration according to draft should be treated as normal IP
packet which has to be routed to the nFA by oFA. But since the MN is
already registered to oFA and lets say we have Reverse Tunneling enabled
on oFA, any packet with the source address as Home Address of MN would
be tunneled to HA including the Pre-registration packet, which is not
what we want. 

Also, in this case if somehow we route the Pre-Reg packet to the nFa
by-passing reverse tunneling (by defining some routing policies or may
be by coding it in such way) , it still may not be a good idea, since
one of the main reason for reverse tunneling is to avoid packet drops
for topologically in-correct source address.

So we would have to define a specific way to handle Pre-Reg packets in
reverse tunneling case eg: Might need to tunnel it to the nFA. Please
let me know your inputs and also in case I am missing something here. In
case you agree to the problem, do you think we might need a revision to
the draft which states and addresses the above mentioned problem

Best Regards
Manish Chugtu 