A customer has a 10,000 branch site requirement arid must use a hub cluster in their design. Which Mware SD-WAN best practice should be used when designing the cluster?

Question

Options

• ABGP on WAN side
• BStatic routing
• CMP BGP south bound
• DBGP on LAN side

• A
  7% (2)
• B
  7% (2)
• C
  70% (19)
• D
  15% (4)

Explanation

MP-BGP southbound is the correct answer because, in VMware SD-WAN hub cluster design, MP-BGP on the southbound (overlay-facing) side is the recommended mechanism for synchronizing branch routes across all hub cluster members at scale - 10,000 branches generate an enormous routing table, and MP-BGP's multi-protocol, multi-address-family capability is specifically designed to handle that volume efficiently within the cluster.

Why the distractors are wrong:

• A (BGP on WAN side): WAN-side BGP is for upstream ISP/carrier peering - it addresses northbound connectivity, not intra-cluster route synchronization for branch scale.
• B (Static routing): Static routes are operationally unmanageable at 10,000 sites and offer zero dynamic failover or scalability.
• D (BGP on LAN side): LAN-side BGP handles integration with the data center or campus network downstream of the hub - it doesn't solve the hub cluster's internal route-sharing problem.

Memory tip: Think of the hub cluster as a spine - "south" points down toward the thousands of branches. MP-BGP southbound = Massive Peer count handled gracefully. If you're scaling to tens of thousands of spokes, you need the protocol built for scale on the side that faces them.

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