How does OMP behave in a Cisco Catalyst SD-WAN architecture if no policy is defined?

Question

Options

• Ato block all communication between WAN Edge routers
• Bto allow a point-to-point topology for WAN Edge routers to communicate from the central location
• Cto allow all WAN Edge routers to communicate using a full mesh topology
• Dto allow a hub and spoke topology for WAN Edge routers to communicate via the central location

• A
  3% (1)
• B
  6% (2)
• C
  91% (30)

Explanation

OMP (Overlay Management Protocol) is the SD-WAN control-plane protocol that runs between vSmart controllers and WAN Edge routers. In its default state with no policy configured, vSmart advertises all OMP routes received from every WAN Edge router to every other WAN Edge router, resulting in a full-mesh logical topology where any site can communicate directly with any other site across available transports. This full-mesh default behavior is a key design feature of Cisco SD-WAN - policies are applied on top of this baseline to restrict or shape traffic flows into hub-and-spoke, partial-mesh, or other topologies. Without a policy, no traffic is blocked (eliminating Answer A), and no topology restriction (hub-and-spoke or point-to-point) is imposed.

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