350-501 · Question #513
Refer to the exhibit. Company A's network architect Is implementing the capabilities that are described In RFC 4379 to provide new options for troubleshooting the company's MPLS network. MPLS LSPs…
The correct answer is C. Open UDP port 3503. E. Implement LSP Ping on PE routers only. Open UDP port 3503: MPLS Operations, Administration, and Maintenance (OAM), as defined in RFC 4379, uses UDP port 3503 for MPLS LSP Ping and Traceroute messages. Opening this port ensures that LSP Ping packets can traverse the network for troubleshooting purposes. Implement LSP…
Question
Refer to the exhibit. Company A's network architect Is implementing the capabilities that are described In RFC 4379 to provide new options for troubleshooting the company's MPLS network. MPLS LSPs are signaled via the BGP routing protocol with IPv4 unicast prefix FECs. Due to company security policies, access is controlled on the control plane and management plane. Which two tasks must the architect perform to achieve the goal? (Choose two.)
Exhibit
Options
- AOpen IMCP port 3505.
- BImplement VCCV on core routers only.
- COpen UDP port 3503.
- DImplement OAM on all MPLS-enabled routers.
- EImplement LSP Ping on PE routers only.
How the community answered
(32 responses)- A9% (3)
- B3% (1)
- C84% (27)
- D3% (1)
Explanation
Open UDP port 3503: MPLS Operations, Administration, and Maintenance (OAM), as defined in RFC 4379, uses UDP port 3503 for MPLS LSP Ping and Traceroute messages. Opening this port ensures that LSP Ping packets can traverse the network for troubleshooting purposes. Implement LSP Ping on PE routers only: LSP Ping is used to verify the forwarding of MPLS LSPs and is typically implemented on PE routers, as they are responsible for establishing and maintaining MPLS LSPs for customer traffic. This allows effective troubleshooting without requiring implementation on every core router.
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