300-510 · Question #31
300-510 Question #31: Real Exam Question with Answer & Explanation
The correct answer is D: route-policy NO_PREPEND if as-path passes-through '11' then drop else pass endif end-policy. 1/routing/command/reference/b_routing_cr41crs/b_routing_cr41crs_chapter_01000.html#wp3850
Question
Refer to the exhibit. XR1 and XR2 are sending the prefix 10.11.11.0/24 to XR3. A configured policy on XR1 is incorrectly prepending AS path 11 11 12 12 onto this prefix. A network operator wants to add a policy onto XR3 that will not allow the falsely prepending prefix from being installed. Which policy configuration applied to the XR3 neighbor configuration for XR1 can accomplish this requirement without impact to other or future received routes? A. B. C. D.
Options
- Aroute-policy NO_PREPEND if as-path passes-through '11' then pass else drop endif end-policy
- Broute-policy NO_PREPEND if as-path prepends drop else pass endif end-policy
- Croute-policy NO_PREPEND if as-path passes-through '1' then pass else drop endif end-policy
- Droute-policy NO_PREPEND if as-path passes-through '11' then drop else pass endif end-policy
Explanation
1/routing/command/reference/b_routing_cr41crs/b_routing_cr41crs_chapter_01000.html#wp3850
Topics
Community Discussion
No community discussion yet for this question.