OSPF broadcast network

jason_hu · Created Sep 15, 2021 12:42:19

Hi friend!
OSPF uses two IP multicast addresses on broadcast and point-to-point networks: 225.0. 0.5 for all OSPF routers and 224.0. 0.6 for all DR/BDR (designated router/backup designated router) routers. Using IP multicast addresses is more efficient than using broadcast addresses.
Hope to help you!

liqiang185 · Created Sep 15, 2021 10:53:53

Dear friend!
Please rest assured that we'll be back with an answer shortly.

jason_hu · Created Sep 15, 2021 12:42:19

Hi friend!
OSPF uses two IP multicast addresses on broadcast and point-to-point networks: 225.0. 0.5 for all OSPF routers and 224.0. 0.6 for all DR/BDR (designated router/backup designated router) routers. Using IP multicast addresses is more efficient than using broadcast addresses.
Hope to help you!

BAZ · Created Sep 15, 2021 14:30:20

To send routing information to a DR or BDR, the multicast address of 224.0.0.6 is used. A DR sends routing updates to the multicast address of 224.0.0.5. If the DR fails, the BDR will take its role of redistributing routing information.

OSPF broadcast network

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