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300-510 · Question #191
300-510 Question #191: Real Exam Question with Answer & Explanation
The correct answer is B: Change the regular expression to ^65547$.. See the full explanation below for the reasoning.
Routing Policy and Manipulation
Question
Refer to the exhibit. Router R1 is expected to receive routes that originate from AS 65547 only. However, R1 is receiving routes from AS 65547 and several other ASs that are directly attached to it. Which change to the AS path permit filter corrects the problem?
Options
- AChange the regular expression to ^$.
- BChange the regular expression to ^65547$.
- CChange the regular expression to .*.
- DChange the regular expression to _65547_.
Topics
#BGP#AS Path Regular Expressions#Routing Policy#Origin AS
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