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Exam 400-101 topic 1 question 273 discussion

Actual exam question from Cisco's 400-101
Question #: 273
Topic #: 1
[All 400-101 Questions]

Which option describes how a router responds if LSA throttling is configured and it receives the identical LSA before the interval is set?

  • A. The LSA is added to the OSPF database and a notification is sent to the sending router to slow down its LSA packet updates.
  • B. The LSA is added to the OSPF database.
  • C. The LSA is ignored.
  • D. The LSA is ignored and a notification is sent to the sending router to slow down its LSA packet updates.
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Suggested Answer: C 🗳️
How OSPF LSA Throttling Works -
The timers throttle lsa all command controls the generation (sending) of LSAs. The first LSA is always generated immediately upon an OSPF topology change, and the next LSA generated is controlled by the minimum start interval. The subsequent LSAs generated for the same LSA are rate-limited until the maximum interval is reached. The "same LSA" is defined as an LSA instance that contains the same LSA ID number, LSA type, and advertising router ID.
The timers LSA arrival command controls the minimum interval for accepting the same LSA. If an instance of the same LSA arrives sooner than the interval that is set, the LSA is dropped. It is recommended that the arrival interval be less than or equal to the hold-time interval of the timers throttle lsa all command.
Reference: http://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/fsolsath.html
"Pass Any Exam. Any Time." - www.actualtests.com 275
by [deleted] at April 3, 2025, 6:25 p.m.

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