OSPFv2 and OSPFv3 Comparison
OSPFv3 bears many similarities to OSPFv2. For example, they both use interface cost as their metric; the same network types exist (that is, broadcast, point-to-point nonbroadcast, multiaccess, and virtual links); the same packet types are used; and LSAs behave in much the same way.
However, a couple of OSPFv2 LSA types are renamed, and a couple of new LSAs are introduced. The LSA changes are as follows:
Renamed LSAs:
Type 3: The Type 3 LSA is renamed as Interarea prefix LSA for ABRs. As with OSPFv2, this Type 3 LSA ...
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