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Exam 200-301 All Questions

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Exam 200-301 topic 1 question 430 discussion

Actual exam question from Cisco's 200-301
Question #: 430
Topic #: 1
[All 200-301 Questions]

What is the effect when loopback interfaces and the configured router ID are absent during the OSPF Process configuration?

  • A. The lowest IP address is incremented by 1 and selected as the router ID.
  • B. The router ID 0.0.0.0 is selected and placed in the OSPF process.
  • C. No router ID is set, and the OSPF protocol does not run.
  • D. The highest up/up physical interface IP address is selected as the router ID.
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Suggested Answer: D 🗳️
by Stonetales987 at Nov. 12, 2021, 2:42 a.m.

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TmNvrWts
10 months, 1 week ago
Selected Answer: D
I guess its D coz the highest physical int. address comes next. Im concerned about this answer coz in my knowledge it does not need to be UP/UP. It just have to exist.
upvoted 1 times
TmNvrWts
10 months, 1 week ago
For OSPF to use an interface to determine the router ID, the interface does not have to be in the UP/UP state. It can be in a DOWN/DOWN state. The router ID is selected based on the highest IP address of any of the router's active interfaces (including loopback interfaces) at the time of OSPF process startup. If no loopback interfaces are configured, OSPF will use the highest IP address on any physical interface, even if that interface is currently down. Screw you CCNA :)
upvoted 1 times
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ccna_goat
2 years, 6 months ago
actually correct answer is poorly worded. interface could be in state UP/DOWN and still be eligible for being router ID.
upvoted 2 times
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Nnandes
2 years, 11 months ago
D: is the correct one "The highest up/up physical interface IP address is selected as the router ID."
upvoted 4 times
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