To reduce the link state checking time with the neighbor in network protocols that perform this function, such as OSPF (Open Shortest Path First) in MikroTik RouterOS network equipment, or in general in network configurations that use detection protocols of neighbors, the parameter that is commonly adjusted is the Hello Interval (Greeting Interval).

El Hello Interval is the time between each hello packet sent by a device to its neighbors to report its presence and to check whether the neighbors are still active. Reducing this interval causes devices to send hello packets more frequently, allowing changes in link state, such as loss of connectivity to a neighbor, to be detected more quickly.

In the context of OSPF, there are two main parameters related to neighbor maintenance and link state:

1. Hello Interval: Defines how often hello packets are sent. A shorter interval increases sensitivity to changes in link state but also increases the load on the network due to increased signaling traffic.
2. Dead Interval: This is the time that must elapse without receiving a hello packet from a neighbor before the router declares the neighbor down or dead. This value is usually a multiple of the Hello Interval.

To adjust these values ​​on a MikroTik RouterOS device, you can use the command line interface (CLI) or WinBox. Here is an example of how you could modify the Hello Interval in OSPF:

/ip ospf interface set [find interface="nombre-de-tu-interfaz"] hello-interval=5s

This command sets the Hello Interval to 5 seconds for the specified interface. It is important to note that any changes to the Hello Interval must be applied consistently across all devices on the same OSPF network segment to ensure correct communication.

Also remember to adjust the Dead Interval in proportion to the Hello Interval to maintain an appropriate relationship between these two times and avoid unnecessary disconnections or not detecting the loss of neighbors in time.