350-501 · Question #542
350-501 Question #542: Real Exam Question with Answer & Explanation
The correct answer is C: Implement mpls oam policy oam on the PE routers.. On each PE you must define an MPLS OAM policy (per RFC 6374/4379) using the mpls oam policy <name> stanza, specifying the loss-threshold and delay‑threshold. You then attach that policy to the MPLS data plane with mpls ip oam map-policy <name> under the relevant interfaces so the
Question
After recent network outages and customer complaints, a large Tier 1 service provider has asked a network engineer to implement MPLS OAM policy on all Provider Edge devices in the MPLS network. To improve network performance and reliability, the policy must be able to detect 2% packet drops and a delay of 0.05 seconds. The solution must be based on RFC 6374 3nd RFC 4379 standards for MPLS OAM. The CCM to detect connectivity issues has already been configured with interval 1000. Which two actions must the engineer take to achieve the goal? (Choose two.)
Options
- ASet loopback delay-frequency 50 and drop-threshold 0.2 on the PE routers.
- BImplement mpls ldp tracing on the PE and P routers.
- CImplement mpls oam policy oam on the PE routers.
- DImplement mpls ip oam map-policy on the PE routers.
- ESet loss-threshold 2 and delay-threshold 50 on the P routers.
Explanation
On each PE you must define an MPLS OAM policy (per RFC 6374/4379) using the mpls oam policy <name> stanza, specifying the loss-threshold and delay‑threshold. You then attach that policy to the MPLS data plane with mpls ip oam map-policy <name> under the relevant interfaces so the OAM packets are actually sent and monitored.
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