Refer to the exhibit.
AS111 is receiving its own routes from AS200 causing a loop in the network.
Which configuration provides loop prevention?
Exam 300-410 All QuestionsBrowse all questions from this exam
Question 67
Correct Answer: B
To prevent AS111 from receiving its own routes from AS200 and causing a loop, it is essential to disable the 'allowas-in' command for the relevant neighbors. The 'allowas-in' command allows the router to accept routes that contain its own AS number in the AS_PATH, which is the root cause of the loop. By disabling 'allowas-in' for both neighbors 195.1.1.1 and 195.1.2.2, AS111 will reject routes containing its own AS number, thus preventing the looping problem.
Discussion
MasoudGhorbaniOption: B
the allowas-in command is used to allow prefixes to be received by the router even if they contain its own AS number in the AS_PATH. the best option is to stop accepting routes containing AS111's own AS number
Colmenarez
This reminds me of an encore lab question.
xziomal9Option: B
The correct answer is: B router bgp 111 no neighbor 195.1.1.1 allowas-in no neighbor 195.1.2.2 allowas-in
Carl1999Option: B
B is correct. In this case, Allow as-in is not needed. Because it disables control of AS_PATH.
SeMo0o0o0Option: B
B is correct