Exam 300-510 topic 1 question 76 discussion

Actual exam question from Cisco's 300-510

Question #: 76
Topic #: 1

Refer to the exhibit.

A network engineer configured routers R1 and R5 to run in IS-IS Level 1 mode and router R6 to run in IS-IS Level 2 mode. All other routers are running as Level 1 / Level 2 routers. An engineer expects traffic from R1 to R6 to pass via R2, but IS-IS routing has calculated the best path via R4. Which action corrects the problem?

A. Configure all routers as Level 1 routers.
B. Remove the link metric for the link from router R1 to router R2.
C. Change the link metric for the link from router R1 to router R2 to 1.
D. Configure all routers as Level 1 / Level 2 routers.

Show Suggested Answer

Suggested Answer: C 🗳️

by thejag at Dec. 17, 2023, 8:49 p.m.

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veryfab12345

10 months, 1 week ago

Selected Answer: C

The Level-1 Area ends at R4 and R3. Keep in mind that default metric in ISIS is 10. So the link R1 to R4 is 10. R1-R2-R3 is 16. So R4 is the better exit. When changing R1-R2 to metric 1, the total metric to the exit point R3 is 9 and now preferred.

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thejag

11 months, 1 week ago

Selected Answer: C

Correct is C

upvoted 1 times

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