Huawei
H12-841_V1.5 · Question #251
In an MPLS VPN network, which of the following factors can cause "VPN users to be unable to communicate," and are considered common points of failure? (Multiple choice)
The correct answer is A. VPN instance configuration error on PE device (e.g., VRF binding interface error). B. The routing protocol between CE and PE has not been established correctly (e.g., OSPF C. MPLS LSP not established between PEs (label forwarding path not working). See the full explanation below for the reasoning.
Intelligent O&M and Troubleshooting in Campus Networks
Question
In an MPLS VPN network, which of the following factors can cause "VPN users to be unable to communicate," and are considered common points of failure? (Multiple choice)
Options
- AVPN instance configuration error on PE device (e.g., VRF binding interface error).
- BThe routing protocol between CE and PE has not been established correctly (e.g., OSPF
- CMPLS LSP not established between PEs (label forwarding path not working)
- DCE devices are directly connected via a Layer 2 link, without the need for an MPLS VPN.
- EVPN user routes exist normally on the PE device, and the LSP path is unobstructed .
How the community answered
(30 responses)- A83% (25)
- D10% (3)
- E7% (2)
Topics
#MPLS VPN troubleshooting#VRF misconfiguration#LSP failure#CE-PE routing failure
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