Check MPLS LSP Connectivity
Question
An engineer needs to improve MPLS network management by implementing a set of tools to support the NOC engineers in troubleshooting network failures.
Which feature should the engineer implement to check the connectivity of the MPLS LSP between the ingress and egress PE routers?
Answers
Explanations
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https://www.cisco.com/c/en/us/td/docs/routers/asr9000/software/asr9k_r5-3/mpls/configuration/guide/b-mpls-cg53x-asr9k/b-mpls-cg53x-To check the connectivity of the MPLS LSP (Label Switched Path) between the ingress and egress PE (Provider Edge) routers, the engineer should implement the MPLS OAM (Operations, Administration, and Maintenance) feature.
MPLS OAM is a set of protocols and tools designed to facilitate fault detection, isolation, and troubleshooting in MPLS networks. MPLS OAM allows network operators to perform proactive and reactive network maintenance tasks, such as verifying the continuity of LSPs, measuring delay and packet loss, and detecting faults in the network.
MPLS OAM includes several protocols, such as:
MPLS Ping: It is used to verify the connectivity of an LSP between two routers by sending an echo request packet through the LSP and checking for the response.
MPLS Traceroute: It is used to trace the path of an LSP through the network by sending probe packets with increasing TTL values and recording the MPLS label stack at each hop.
MPLS LSP Trace: It is used to diagnose faults in an LSP by tracing the label stack and identifying the point of failure.
BFD for MPLS: It is used to detect faults in an LSP by monitoring the control plane messages exchanged between the routers.
By implementing MPLS OAM, the engineer can provide the NOC (Network Operations Center) engineers with the necessary tools to troubleshoot network failures and improve the overall management of the MPLS network.
