OSPFv3 operates over IPv6 and uses the IPv6 header directly. It can transmit packets in the following modes:
Multicast: Uses standard multicast addresses such as:
FF02::5 (All OSPF routers)
FF02::6 (All DR/BDR routers)
Unicast: Used for point-to-point neighbor communication when required.
Broadcast: On broadcast-capable networks, such as Ethernet.
✅ Official Reference from Huawei:
" OSPFv3 runs directly on top of IPv6 and uses the IPv6 header for transport. It supports unicast, multicast, and broadcast modes, similar to OSPFv2 but adapted for IPv6. "
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