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Exam 300-510 topic 1 question 62 discussion

Actual exam question from Cisco's 300-510
Question #: 62
Topic #: 1
[All 300-510 Questions]



Refer to the exhibit. An engineer working for a private telecommunication company with an employee id: 1234:09:567 implemented this configuration on Router1, what is the effect of it?

  • A. Router 1 receives only one best path from neighbor 192.168.1.1
  • B. Router 1 sends only one best path to neighbor 192.168.1.1
  • C. Router 1 sends up to three paths to neighbor 192.168.1.1 for all routes
  • D. Router 1 sends and receives multiple best paths from neighbor 192.168.1.1
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Suggested Answer: D 🗳️
by thejag at Dec. 19, 2023, 4:55 p.m.

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Storcaks
10 months, 2 weeks ago
Selected Answer: D
A. Incorrect. Router 1 is configured to receive multiple paths due to the bgp additional-paths receive command, not just the best path. B. Incorrect. Router 1 is configured to send multiple paths due to the neighbor 192.168.1.1 additional-paths send command, not just the best path. C. Incorrect. The configuration does not specify the number of paths to send; it only indicates that additional paths can be sent. The group-best selection does not imply exactly three paths, it means the best path from each group. D. Correct. Router 1 is configured to send and receive multiple best paths from its neighbor due to both the bgp additional-paths receive and neighbor 192.168.1.1 additional-paths send receive commands. The advertise additional-paths group-best command further specifies that multiple best paths (i.e., the best path from each group) will be advertised to the neighbor. Therefore, the correct effect of this configuration on Router 1 is: D. Router 1 sends and receives multiple best paths from neighbor 192.168.1.1.
upvoted 2 times
Storcaks
10 months, 2 weeks ago
From ios-xe Version 17.03.04a Router#sh run | s bgp router bgp 1 bgp log-neighbor-changes neighbor 10.0.0.1 remote-as 2 ! address-family ipv4 bgp additional-paths select group-best bgp additional-paths receive neighbor 10.0.0.1 activate neighbor 10.0.0.1 additional-paths send receive neighbor 10.0.0.1 advertise additional-paths group-best exit-address-family Router#sh ip bgp Network Next Hop Metric LocPrf Weight Path * 1.1.1.0/24 10.0.0.1 0 2 20 ? *> 10.0.0.1 0 2 10 ? * 2.2.2.0/24 10.0.0.1 0 2 20 ? *> 10.0.0.1 0 2 10 ? * 3.3.3.0/24 10.0.0.1 0 2 20 ? *> 10.0.0.1 0 2 10 ? *> 10.0.2.0/24 10.0.0.1 0 2 20 ? *> 10.0.3.0/24 10.0.0.1 0 2 10 ?
upvoted 1 times
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thejag
11 months ago
It think B because at the AF level there is no "send" and the AF level is restrictive so it will only send 1 path. B. Router 1 sends only one best path to neighbor 192.168.1.1
upvoted 1 times
NC9337
10 months ago
No, the neighbor-level command having higher precedence over the address-family statement.
upvoted 1 times
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