The core of a network has four routers connected in a square design with Gigabit Ethernet links
using /30 subnets. The network is used to carry voice traffic and other applications. Convergence
time is taking more than expected. Which three actions would you take to improve OSPF
convergence time? (Choose three.)
A.
Increase MTU of the interfaces to accommodate larger OSPF packets
B.
Change the network type to point-to-point on those links.
C.
Reduce SPF initial timer.
D.
Increase hello interval to avoid adjacency flapping.
E.
Enable OSPF.
Explanation:
The OSPF SPF Throttling is configured using the command timers throttle spf OSPF router
configuration command.
spf-start: Initial delay to schedule an SPF calculation after a topology change. Range is 1 to
600000 milliseconds.spf-hold: Minimum hold-time between two SPF calculations. Range is 1 to
600000 milliseconds.spf-max-wait: Maximum wait between two SPF calculations. Range is 1 to
600000 milliseconds.
This command is used to delay the SPF algorithm being executed during network instability. SPF
Is very CPU intensive.