OSPF Smart-discover
Definition
Generally, routers periodically send Hello packets through OSPF interfaces. That is, a Router sends Hello packets at the Hello interval controlled by a Dead timer. Because Hello packets are sent at a fixed interval, the establishment of OSPF neighbor relationships is slowed down.
Enabling Smart-discover can speed up the establishment of OSPF neighbor relationships in specific scenarios.
Smart-discover Configured |
Processing |
|---|---|
No |
|
Yes |
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Implementation
In the following scenarios, an interface enabled with Smart-discover can send Hello packets to neighbors without waiting for the expiration of the Hello timer:
The neighbor status becomes 2-way for the first time.
The neighbor status changes from 2-way or a higher state to Init.