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Exam 300-510 topic 1 question 148 discussion

Actual exam question from Cisco's 300-510
Question #: 148
Topic #: 1
[All 300-510 Questions]



Refer to the exhibit. There is a BGP traffic path issue between Customer-1 and Customer-2. Users from Customer-2 have reported file transfer issues. High utilization on the path between both customers causes many packet drops. Which configuration resolves the issue?

  • A. R4#router bgp 65504 -
    neighbor 10.0.23.3 remote-as 65501
    neighbor 10.0.23.3 filter-list 1 out
    ip as-path access-list 1 deny ^65505$
    ip as-path access-list 1 permit .*
  • B. R4#router bgp 65504 -
    address-family ipv4 unicast
    neighbor 10.0.23.3 remote-as 65501
    neighbor 10.0.23.3 activate
    neighbor 10.0.23.3 route-map PREPEND in
    exit-address-family
    exit
    route-map PREPEND permit 10
    set as-path prepend 65506 65507
  • C. R1#neighbor 10.0.23.3 route-map LOCAL-PREF-150 out
    route-map LOCAL-PREF-150
    set local-preference 150
  • D. R1#neighbor 10.0.24.4 route-map LOCAL-PREF-150 in
    route-map LOCAL-PREF-150
    set local-preference 150
    ip prefix-list 5-5-5-S seq 5 permit 5.5.5.5/32
    route-map LOCAL-PREF-150 permit 10
    match ip address prefix-list 5-S-5-5
    set local-preference 150
Show Suggested Answer Hide Answer
Suggested Answer: A 🗳️
by DUsoo at Feb. 21, 2024, 6:50 p.m.

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snowbow
6 months, 1 week ago
Selected Answer: A
A is correct. I labbed this up, from R4's perspective, the routes from router 5.5.5.5 only have 65505 in the AS-Path, the as-path filtering is processed before the local AS (65504) is appended to the AS-Path. So A works exactly as depicted.
upvoted 1 times
snowbow
6 months, 1 week ago
This is all assuming the IP is just incorrect in the diagram,
upvoted 1 times
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serban_17
8 months, 2 weeks ago
Something is wrong in the answers 'A' works, but it should be the IP address of R1 'B' would work with out direction and the IP of R1
upvoted 1 times
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DUsoo
9 months, 2 weeks ago
Output is from R1 --> and network 5.5.5.5 has next hop IP 10.0.23.3 so "A" can not be the correct one. R4 has interface IP 10.0.23.3 and not R1. R4#router bgp 65504 - neighbor 10.0.23.3 remote-as 65501 --> this is not correct neighbor IP!
upvoted 1 times
thejag
9 months, 2 weeks ago
DUsoo is right, there is some mix ups here. The configuration of A looks correct if it was R1.
upvoted 2 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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