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300-510 · Question #158
300-510 Question #158: Real Exam Question with Answer & Explanation
The correct answer is B: Configure the allowas-in command on R1.. See the full explanation below for the reasoning.
Routing Policy and Manipulation
Question
Refer to the exhibit. An engineer is troubleshooting an issue with this network and notices that prefixes from R3 are missing on the R1 rooting table. Due to repeated ASN, when the 10.0.0.0/8 prefix from R3 arrives at R1, BGP automatically rejects it. There is no prefix-list on R1 which blocks the traffic from R3. What should the engineer do to fix the problem so that BGP allows that prefix on R1?
Options
- AConfigure R2 as a route reflector client of R1.
- BConfigure the allowas-in command on R1.
- CConfigure the next-hop-self command on R2.
- DConfigure identical confederation ASNs on RI and R2.
Topics
#BGP#AS_PATH#Loop Prevention#allowas-in
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