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> * Address was configured using SLAAC : Nobody is keeping track of the > address used by the node. In this case when the node gets back into the > link, it needs to do DAD. > > Is this an acceptable bifurcation? Not completely. If the host is only gone from the link for a small period (e.g. enough to complete a handoff), then I don't see why DAD should be required, since enough time would not have elapsed to allow another host to complete DAD for the same address. Also, longer absences are similar in the effect of network partitioning and healing, where two hosts can each complete DAD, and therefore come to believe that their addresses are unique. Yet when their previously partiioned networks are joined, they can discover conflicts. Therefore the problem of ongoing conflict detection exists in either scenario. |