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Exam 300-510 topic 1 question 173 discussion

Actual exam question from Cisco's 300-510
Question #: 173
Topic #: 1
[All 300-510 Questions]

Refer to the exhibit.





The service provider operations team was alerted that hub site traffic from BGP AS 65101 to AS 65201 uses a non-primary path via the R5-R6 link. IBGP peering between R1 and R2 is up, and no fiber failure has been reported on the R2-R3 link. The team determined that the traffic flow between 10.10.10.1 and 192.168.30.1 is not considering the R1-R2-R3-R4 path.

Which action resolves this issue?

  • A. Add metric 5 with BGP neighbor 10.10.10.6 on R5 for receiving routes.
  • B. Change the metric attribute to 20 with neighbor 10.10.10.5 on R1.
  • C. Set the local-preference to the default value with BGP neighbor 10.10.10.3 on R2 for receiving routes.
  • D. Change the local-preference attribute to 50 with neighbor 10.10.10.5 on R1.
Show Suggested Answer Hide Answer
Suggested Answer: D 🗳️
by serban_17 at March 21, 2024, 6:19 p.m.

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Seele
10 months, 1 week ago
D would be correct if it's on R2, not R1. A & B are incorrect because local pref is the 2nd highest priority in route selection so meddling with metric will do nothing. C is incorrect because lowering the local pref of neighbor 10.10.10.3 on R3 will also do nothing as it's already lower than 10.10.10.5.
upvoted 1 times
Seele
10 months, 1 week ago
C is incorrect because lowering the local pref of neighbor 10.10.10.3 on "R2" - sorry about that.
upvoted 1 times
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serban_17
1 year, 2 months ago
It makes sense to make the change from D on R2, not R1
upvoted 1 times
snowbow
1 year ago
I disagree, setting the local pref to 50 on R1 towards R5 will make the routes from it appear less preferable than the default local pref of 100 towards R2, making R2 the preferred path out
upvoted 1 times
snowbow
1 year ago
After looking more this actually seems correct, R2 isnt even advertising a path from R5 to R1 because its ibgp -> ibgp, so unless R2 thinks its path is the best, it will never advertise one to R1
upvoted 1 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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