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Exam 350-501 topic 1 question 325 discussion

Actual exam question from Cisco's 350-501
Question #: 325
Topic #: 1
[All 350-501 Questions]



Refer to the exhibit. The network engineer who manages ASN 65001 must configure a BGP routing policy on GW-XR1 with these requirements:

• Advertise locally-originated routes and /24 prefixes assigned within the 198.18.0.0/15 range. All other prefixes must be dropped.
• Reachability to 198.18.100.0/24 must be preferred via the EDGE-1 connection.
• Reachability to 198.19.100.0/24 must be preferred via the EDGE-2 connection.

Which configuration must the network engineer implement on GW-XR1?

  • A.
  • B.
  • C.
  • D.
Show Suggested Answer Hide Answer
Suggested Answer: B 🗳️
by SirPeter at Jan. 1, 2023, 10:19 a.m.

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12_sdeEQ
Highly Voted 1 year, 6 months ago
Sur it's B
upvoted 5 times
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sushil_bhattacharjee
Most Recent 7 months, 4 weeks ago
Selected Answer: B
Answer: B D: it doesn't have "eq 24" C: if as-path is-local then done !!!! it stops further A: for neighbor 10.201.0.1, as prepended for wrong set ACL=SET_2=192.168.19.0/24 and vice versa
upvoted 2 times
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IcQ
1 year, 5 months ago
Selected Answer: B
A- uses remote end AS to prepend and prepends the wrong SET (SET_2 should be prepend to Peer 1, SET_1 to Peer_2) C - uses done/pass combination without drop: - if as-path is-local -> done [stops processing further] - but if it’s NOT local then moves to next if -> is part of 198.18.0.0/15 eq 24? if yes pass - but if it’s NOT part of that subnet -> is part of this prefix set? - but if it’s NOT part of that prefix -> then PASS (else done statement) D - miss the eq 24 in the “if destination” statement so larger mask length can pass
upvoted 1 times
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thejag
1 year, 7 months ago
Not C because if as-path is-local then DONE (in B it is PASS) DONE - accepts prefix and STOPS processing but we want it to continue for the prepend as-path. PASS - allow the execution to continue
upvoted 1 times
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DUsoo
1 year, 8 months ago
Selected Answer: B
B is correct
upvoted 1 times
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Samarjit1983
1 year, 9 months ago
It is B, D say's 192.XXX/15 not with ge or le option so exact match cannot be true.
upvoted 1 times
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SirPeter
1 year, 9 months ago
It is B. Destination-prefix is for flowspec. https://community.cisco.com/t5/mpls/cisco-xr-rpl-destination-vs-destination-prefix/td-p/4587693
upvoted 2 times
chst
1 year, 9 months ago
A - Prepend a incorrect AS_number to neighbors (64611 and 64612) C - has "ndif" instead of "endif" D - don't match the correct prefix 192.18.0.0/15 eq 24 "B" it's the correct.
upvoted 2 times
thejag
1 year, 7 months ago
I don't see the "ndif" in C
upvoted 1 times
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