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Exam 2V0-11.24 All Questions

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Exam 2V0-11.24 topic 1 question 75 discussion

Actual exam question from VMware's 2V0-11.24
Question #: 75
Topic #: 1
[All 2V0-11.24 Questions]

An administrator logged into NSX Manager to view host details. The administrator noticed that the "Tunnel" status for the ESXi hosts, in the VI workload domain, is showing down.
What is a possible reason the ESXi host tunnels are showing down in NSX?

  • A. The IGMP has been disabled on the network.
  • B. The MTU setting for the host TEPs has been set to 1500.
  • C. The host TEP IP addresses are being dynamically assigned through DHCP instead of being statically assigned.
  • D. The overlay traffic is being blocked by the gateway firewall.
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Suggested Answer: B 🗳️
Community vote distribution
D (100%)
by Manu62 at March 22, 2025, 2:22 p.m.

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Manu62
2 weeks ago
Selected Answer: D
In NSX-T, ESXi hosts communicate through Tunnel Endpoints (TEPs) using Geneve encapsulation. If the Tunnel status is "Down", it means the overlay communication between ESXi hosts is failing. The most common cause of this issue is that overlay traffic (UDP 6081) is being blocked by a firewall at the gateway or upstream network device. Why "Overlay Traffic Blocked by Firewall" is the Correct Answer? NSX-T uses UDP port 6081 for Geneve encapsulation to create overlay tunnels between ESXi hosts and Edge Transport Nodes. If a firewall blocks UDP 6081, TEPs cannot establish communication, causing tunnels to show "Down" in NSX Manager. Solution: Ensure that UDP 6081 is allowed between all transport nodes (ESXi hosts, Edge Nodes, and NSX-T Managers).
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B (20%)
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