350-501 Question #22: Real Exam Question with Answer & Explanation

Question

Which utility can you use to locate MPLS faults?

Options

• AMPLS traceroute
• BEEM
• CMPLS LSP ping
• DQoS

Explanation

MPLS traceroute is a specialized utility used to locate faults and trace the forwarding path of Label Switched Paths (LSPs) within an MPLS network.

Common mistakes.

• B. EEM (Embedded Event Manager) is a Cisco IOS feature for on-box event detection and automation, not a utility for actively locating MPLS faults.
• C. MPLS LSP ping is used to verify the reachability of an LSP endpoint and confirm end-to-end data plane connectivity, but it does not provide the hop-by-hop path information needed to locate faults like traceroute does.
• D. QoS (Quality of Service) is a mechanism for managing network traffic to reduce packet loss, latency, and jitter, and is not a utility for locating network faults.

Concept tested. MPLS fault isolation with traceroute

Reference. https://www.cisco.com/c/en/us/td/docs/ios/mpls/configuration/guide/12_4t/t_mpls_12_4t_book/t_mpls_troubleshoot.html

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