Destination IP addresses of packets of different network types sent by OSPF interfaces on S series switches

Destination IP addresses of packets of different network types sent by S series switches supporting OSPF are as follows:
Hello packets
On a broadcast, P2MP, or P2P network, Hello packets are sent to the manycast IP address 224.0.0.5. On a virtual link, Hello packets are sent to the other end of the virtual link. On an NBMA network, Hello packets are sent to neighbors in unicast mode.

DD, LSR, and LSU packets
On broadcast, P2MP, and NBMA networks, DD, LSR, and LSU packets are sent to the IP addresses of neighbors in unicast mode. On P2P networks, DD, LSR, and LSU packets are sent to the IP address 224.0.0.5.

LSAck packets
On a P2P network, LSAck packets are sent to the IP address 224.0.0.5.
On P2MP and NBMA networks, LSAck packets are sent to neighbors in unicast mode.
On a broadcast network, LSAck packets are transmitted in multicast mode. If sent by the DR or BDR, the packets are transmitted to 224.0.0.5; otherwise, the packets are transmitted to 224.0.0.6.

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