Proposal for Issue 7

As mentioned in the proposal for issue 6, if the Registration Reply is lost, the Mobile Node will retransmit the Registration Request as mentioned in RFC 3344. In this case, the challenge value in the retransmitted request will be the same as sent in the original Registration Request message. Hence, there is no need to have "keep N+1 challenge values".

There are no modifications proposed for this issue in RFC3012bis draft.