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Exam JN0-348 All Questions

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Exam JN0-348 topic 1 question 29 discussion

Actual exam question from Juniper's JN0-348
Question #: 29
Topic #: 1
[All JN0-348 Questions]

Your network connections to the Internet through two different ISPs using EBGP. You must ensure that ISP1 is the primary path used for all traffic entering your network while using ISP2 as a backup path.
In this scenario, which statement is correct?

  • A. You should use a lower MED value on routes sent to ISP1.
  • B. You should assign a higher local preference on routes that you are sending to ISP1.
  • C. You should change the next hop for all routers sent to ISP2.
  • D. You should prepend your local AS number three times on routes that you are sending to ISP2.
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Suggested Answer: D 🗳️
by Clxxcv420 at March 8, 2021, 8:46 a.m.

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Sanju_13
1 year, 4 months ago
B.Correct (Local Preference higher is better when selecting router from different ISP)
upvoted 2 times
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nickname98163
2 years, 4 months ago
Selected Answer: D
D. You should prepend your local AS number three times on routes that you are sending to ISP2. "Prefer the shortest AS-path length." leads "Prefer the lowest MED value." https://www.juniper.net/documentation/en_US/junos/topics/reference/general/routing-protocols-address-representation.html#jd0e305 ...my 2 cents.
upvoted 1 times
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TECH3K3
3 years, 7 months ago
If you're on about real-world scenarios then it's always prepended. I have worked for a few organization in the UK including BBC, Sky and ITV and it's always Prepend. The key difference between MED and path prepending is that MED is only relevant to the neighboring AS ie. it does not go beyond that. Path prepending does. So if you wanted to influence routing beyond your neighboring AS path prepending would be the one to use.
upvoted 4 times
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Clxxcv420
3 years, 8 months ago
ah no, MED for the multiple interconnection to one area. AS prepend for entrie AS Path (well-known mandatory)
upvoted 2 times
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Clxxcv420
3 years, 8 months ago
Tricky one. MED or AS prepend ...
upvoted 3 times
...

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