Question

According to OSPF configuration, what should be the relationship between dead timers and hello timers?

a) Dead timers should be half the hello timers.
b) Dead timers should be the same as hello timers.
c) Dead timers should be 4 times the hello timers.
d) Dead timers should be 2 times the hello timers.

Answer 1

In OSPF configuration, the dead timers and hello timers are used to detect the availability of OSPF routers. The dead timers should be 4 times the hello timers to allow more time for routers to detect and react to network failures.

Step-by-step explanation:

In OSPF (Open Shortest Path First) configuration, the dead timers and hello timers are used to detect the availability of OSPF routers. The hello timer is the period of time between the sending of OSPF hello packets, which are used for neighbor discovery and to maintain neighbor relationships. The dead timer is the period of time after which a router considers a neighbor to be unreachable if it has not received OSPF hello packets.

The relationship between dead timers and hello timers in OSPF configuration is that the dead timers should be 4 times the hello timers. This means that if the hello timer is set to 10 seconds, the dead timer should be set to 40 seconds.

Having a longer dead timer compared to the hello timer allows more time for OSPF routers to detect and react to network failures, ensuring reliable path selection and convergence in OSPF routing.