Exam 300-415 topic 1 question 109 discussion

This should be A. • 0.0.0.0/0—Match any prefix–length pair. • 0.0.0.0/0 le length—Match any IP prefix whose length is less than or equal to length. For example, ip-prefix 0.0.0.0/0 le 16 matches all IP prefixes with lengths from /1 through /16. https://sdwan-docs.cisco.com/Product_Documentation/Software_Features/SD-WAN_Release_16.3/06Policy_Basics/03Localized_Control_Policy/Configuring_Localized_Control_Policy

0.0.0.0/0 le 16 matches all IP prefixes with lengths from /0 to /16. The question asks for /1 to /16.

Option B is a ridiculous answer, as it only matches routes where the first bit is a 0.

Option A (0.0.0.0/0 le 16) also matches the criteria but it includes all IP prefixes up to /16, including those longer than /16 (e.g., /17, /18, etc.), which may not be desired. B

Correct answer is A.

This should be A as well. • 0.0.0.0/0 le length—Match any IP prefix whose length is less than or equal to length. For example, ip-prefix 0.0.0.0/0 le 16 matches all IP prefixes with lengths from /1 through /16. Reference: https://sdwan-docs.cisco.com/Product_Documentation/Software_Features/SD-WAN_Release_16.3/06Policy_Basics/03Localized_Control_Policy/Configuring_Localized_Control_Policy

Technically A is flawed becasue A match the default route 0.0.0.0/0, of which the prefix-length is arguably 0.

Corretto A Explanation in FlipCCNP comment

B is correct. le denotes any range between 0-16(inclusive)

A is correct

A is correct of course, but 0.0.0.0/1 le 16 is also matching all prefixes from /1 to /16, so.. interesting..

A is correct

The question clearly says from /1 to /16, 0.0.0.0/0 match everything Broadcast addr is 255.255.255.255. 0.0.0.0/1 Broadcast addr is 127.255.255.255 dont get confused isnot the same. i would go with B

Agree. It should be A. example, ip-prefix 0.0.0.0/0 le 16 matches all IP prefixes with lengths from /1 through /16.