Which two statements describe the functionality of OSPF packet-pacing timers? (Choose two.)

Question

Options

• AThe group-pacing timer controls the interval that is used for group and individual LSA refreshment.
• BOSPF flood-pacing timers allow dynamic control of the OSPF transmission queue size.
• COSPF retransmission-pacing timers allow control of packet interleaving between nonconsecutive link-state
• DOSPF flood-pacing timers allow control of interpacket spacing between consecutive link-state update
• EOSPF retransmission-pacing timers allow control of interpacket spacing between consecutive link-state

• A
  3% (1)
• B
  10% (4)
• C
  83% (33)
• D
  5% (2)

Explanation

Cisco's OSPF packet-pacing timers throttle the rate at which LSA-related packets are sent, preventing CPU overload and link saturation during flooding and retransmission events. There are three distinct pacing timers: (1) LSA group-pacing timer - groups LSAs together for periodic refresh operations to reduce overhead; (2) flood-pacing timer - controls the interpacket gap between consecutive LSU packets being flooded to neighbors; (3) retransmission-pacing timer - controls the interpacket gap between consecutive LSU packets being retransmitted to neighbors that have not yet acknowledged receipt. Choice E correctly describes the retransmission-pacing timer's function of controlling spacing between consecutive retransmitted link-state packets. Choice C correctly describes the retransmission-pacing timer's ability to control packet interleaving between non-consecutive retransmitted link-state packets. Choice B is incorrect because flood-pacing controls interpacket timing, not queue size. Choice D incorrectly attributes the function to flood-pacing timers rather than retransmission-pacing.

No community discussion yet for this question.