Exam 350-501 topic 1 question 66 discussion

Actual exam question from Cisco's 350-501

Question #: 66
Topic #: 1

You are writing an RPL script to accept routes only from certain autonomous systems. Consider this code:
RP/0/RP0/CPU0:router(config-rpl)# if as-path in (ios-regex '.*77$')
RP/0/RP0/CPU0:router(config-rpl-if)# pass
RP/0/RP0/CPU0:router(config-rpl-if)# endif
If you apply this code to BGP filters, which effect does the code have on your router?

A. denies routes from AS 7070
B. allows routes from AS 7077
C. denies routes from AS 7007
D. allows routes from AS 770

Show Suggested Answer

Suggested Answer: B 🗳️

by [deleted] at Oct. 11, 2020, 9:53 p.m.

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rans3001

10 months ago

I see funny characters in that regexp. Based on other dump, it is the following: if as-path in (ios-regex '.*77$') Correct answer B (the as-path must end with 77)

upvoted 3 times

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Jjsa1994

1 year, 5 months ago

comments here the funniest! lmao

upvoted 1 times

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costascarramanlis

1 year, 5 months ago

Agree with EdgardoAC. It should have been "if as-path in (ios-regex '˜.*77$') then", but focus on that part and you are golden.

upvoted 1 times

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EdgardoAC

1 year, 6 months ago

If you only consider the portion 77$, which means the string has to end on 77, the other options are discarded.

upvoted 2 times

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[Removed]

1 year, 6 months ago

I think it's meant to be (ios-regex "^.*77$")