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What should the engineer do to fix the problem so that BGP allows that prefix on R2?

Refer to the exhibit.

A network engineer has divided AS into confederations. Due to repeated ASN, when the 10.0 0.0/8 prefix from R1 arrives to R2, BGP automatically rejects it .

What should the engineer do to fix the problem so that BGP allows that prefix on R2?
A . Configure the command as-override on R1.
B. Configure the command allowas-in on R2.
C. Configure the command allowas-in on all the PE routers.
D. Configure the command as-override on R2.

Answer: B

Explanation:

Reference: https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/112236-allowas-in-bgp-config-example.html

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