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4A0-101 Exam - Question 39


Click on the exhibit.

Router R2 learns the networks shown from IS-IS. Router R2 is configured to redistribute routes from IS-IS to OSPF as shown. Assume the OSPF and IS-IS adjacencies are operational.

How many OSPF Type 5 LSAs will router R1 receive from router R2?

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Correct Answer: CD

Router R2 is configured with a policy to redistribute IS-IS routes into OSPF based on the specified prefix lists. The prefix list 'no-redist' denies the exact prefix 192.168.2.0/24, and the prefix list 'redist-16' allows redistribution for prefixes that are part of 192.168.0.0/16 but longer. The policy statement 'isis-ospf' specifies that entries matching 'redist-16' will be accepted and those matching 'no-redist' will be rejected. Therefore, router R2 will redistribute the prefixes 192.168.1.0/24 and 192.168.4.0/24 into OSPF, resulting in 2 OSPF Type 5 LSAs being sent to router R1.

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snowblack
Nov 21, 2020

This policy not good because deny action should be on the top.

krish2021
Jan 6, 2021

if reject come under entry 10 answer would be 2 LSA