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5V0-42.21 · Question #10

Which port is used for communication between VMware SD-WAN Edge and Orchestrator if there are no tunnels established to the Gateways?

The correct answer is B. TCP 80. TCP 80 is the fallback communication port that VMware SD-WAN Edges use to reach the Orchestrator when no VCMP tunnels to Gateways have been established - this covers the bootstrap phase or any scenario where Gateway connectivity is unavailable, allowing the Edge to still…

SD-WAN Architecture and Technologies

Question

Which port is used for communication between VMware SD-WAN Edge and Orchestrator if there are no tunnels established to the Gateways?

Options

  • AUDF 2426
  • BTCP 80
  • CTCP 443
  • DUDP 500

How the community answered

(65 responses)
  • A
    8% (5)
  • B
    86% (56)
  • C
    2% (1)
  • D
    5% (3)

Explanation

TCP 80 is the fallback communication port that VMware SD-WAN Edges use to reach the Orchestrator when no VCMP tunnels to Gateways have been established - this covers the bootstrap phase or any scenario where Gateway connectivity is unavailable, allowing the Edge to still receive configuration and management traffic directly.

Why the distractors are wrong:

  • UDP 2426 is the VCMP (VeloCloud Multipath Protocol) port used for Edge-to-Gateway data plane tunnels - not Edge-to-Orchestrator management traffic.
  • TCP 443 is used for HTTPS access to the Orchestrator UI by administrators, not for the Edge management channel in this specific no-tunnel scenario.
  • UDP 500 is the IKE/IPsec port for key exchange in VPN tunnels - unrelated to Orchestrator management communication.

Memory tip: Think "80 = before tunnels begin." Port 80 (HTTP) feels like the most "basic" fallback, and that's exactly when it's used - when the Edge hasn't yet bootstrapped its secure tunnel infrastructure and needs a simple path to phone home to the Orchestrator.

Topics

#Edge-Orchestrator Communication#Management Port#TCP 80#SD-WAN Bootstrap

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