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Exam 350-501 topic 1 question 263 discussion

Actual exam question from Cisco's 350-501
Question #: 263
Topic #: 1
[All 350-501 Questions]


Refer to the exhibit. A network support engineer for ASN 65502 receives a technical support ticket from a customer in ASN 65503 who reports that an eBGP session is down. The engineer determines that the peering failed after a recent change to the device at 192.168.26.2. EDGE-GW-1 must establish an eBGP session with the peering router 192.168.26.2. Which configuration establishes this session?

  • A. configure terminal no router bgp 65502 router bgp 65503 neighbor 192.168.26.2 remote-as 65503 address-family ipv4 neighbor 192.168.26.2 activate end
  • B. configure terminal router bgp 65502 address-family ipv4 neighbor 192.168.26.2 activate end
  • C. configure terminal no router bgp 65502 router bgp 65503 neighbor 192.168.26.2 remote-as 65123 address-family ipv4 neighbor 192.168.26.2 activate end
  • D. configure terminal router bgp 65502 no neighbor 192.168.26.2 remote-as 65503 neighbor 192.168.26.2 remote-as 65123 address-family ipv4 neighbor 192.168.26.2 activate end
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Suggested Answer: D 🗳️
by wstark13 at Oct. 6, 2022, 2:19 a.m.

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wstark13
Highly Voted 2 years, 8 months ago
Selected Answer: D
Look the logs, remote peer is wrong. The remote peer is showed in HEXA "FE63". If you do the math will findout the FE63 is 65123
upvoted 9 times
17c8777
7 months ago
(F * 16^3) + (E * 16^2) + (6 * 16^1) + (3 * 16^0) + 3 61440 + 3584 + 96 + 3 = 65123
upvoted 1 times
17c8777
7 months ago
Oups, forget the last +3
upvoted 1 times
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Martiian
Most Recent 1 year, 6 months ago
No math involved here tbh. We know that it is an eBGP neighborship, therefore it cannot be 65502. It is also currently configured for 65503... and the logs are saying this is the wrong AS. Therefore, the AS can only be 655123.
upvoted 3 times
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RoburPace
1 year, 9 months ago
Selected Answer: D
"engineer for ASN 65502", so A and C is wrong. "(peer in wrong AS) 2 bytes FE63", so ANS is D. (0xFE63 = 65123)
upvoted 1 times
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ccie_race
2 years, 8 months ago
Correct D Check the 2nd line of logs saying "peer in wrong AS"
upvoted 1 times
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C (25%)
B (20%)
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