Ikev2 IKE-SA rekey collision

["David W. Faucher" <dfaucher@lucent.com>]

Regarding draft-ietf-ipsec-ikev2-02.tx IKE-SA rekeying:

If there is a collision where both sides attempt to
rekey an IKE-SA at the same time, which one ends up
owning the child-SAs? 

It is possible to avoid this condition all together by
simply using some value within the messages to determine
who will "win" the rekey. For example, the side whose
nonce has the greater value. Alternatively, one could 
use the initiator of the current IKE-SA to determine
who "wins" the rekey.

David