CCDE: Cisco Certified Design Expert (Practical) — Question 238

Your company implemented LFA in the network to help with fast convergence in case a failure occurs on the network. However, while the network is being tested to confirm that LFA is working properly, the test set starts receiving "TTL expired in transit" messages for a limited amount of time. What is the cause of these messages?

Answer options

• A. recursion
• B. flooding of packets
• C. microloops
• D. interface dampening

Correct answer: C

Explanation

The 'TTL expired in transit' messages are typically caused by microloops, which occur when packets circulate in the network due to incorrect routing information. While recursion, flooding of packets, and interface dampening can cause network issues, they do not directly lead to TTL expiration in this context.