Term
| In this state, no Hello packets have been received on the interface. |
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Definition
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Term
| In this state, neighbors must be configured manually. It applies only to nonbroadcast multi-access (NBMA) network connections. |
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Definition
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Term
| In this state, Hello packets have been received from another router, but bidirectional communication hasn’t been established yet. |
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Definition
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Term
| In this state, Hello packets that include their own router ID in the Neighbor field have been received. Bidirectional communication has been established. |
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Definition
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Term
| In this state, the DR and BDR establish adjacencies with each router in the network. A master-slave relationship is created between each router and its adjacent DR and DBR. The router with the highest RID becomes the master. |
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Definition
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Term
| In this state, routing information is exchanged using Database Description (DBD or DD) packets, and Link State Request (LSR) and Link State Update packets may also be sent. |
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Definition
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Term
| In this state, Link State Request (LSR) packets are sent to neighbors to request any Link-State Advertisements (LSAs) that may have been missed or corrupted while the routers were in the EXCHANGE state. Neighbors respond with Link State Update (LSU) packets, which are in turn acknowledged with Link State Acknowledgement (LSAck) packets. |
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Definition
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Term
| In this state, all LSA information is synchronized among neighbors, and adjacency has been established. OSPF routing can begin. |
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Definition
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