Which design consideration must be made when dual vEdge routers are deployed at a branch site?

Question

Options

• AUse BGP AS-path prepending to influence egress traffic and use MED to influence ingress traffic
• BHSRP priorities must match the OMP routing policy to prefer one vEdge over the other.
• CTraffic must be symmetrical as it egresses the vEdges and returns from remote sites for DPI to
• DConfigure BFD between vEdge routers to detect sub-second link failures.

• A
  7% (2)
• B
  13% (4)
• C
  77% (23)
• D
  3% (1)

Explanation

When dual vEdge routers are deployed at a branch site in a Cisco SD-WAN architecture, a critical design consideration is traffic symmetry (C). Deep Packet Inspection (DPI) - used for application-aware routing and policy - must see both directions of a traffic flow to correctly identify and classify applications. If outbound traffic exits through vEdge-1 but the return traffic enters through vEdge-2, DPI cannot correlate the flows, leading to incorrect application identification and policy enforcement failures. Therefore, traffic engineering must be designed to ensure that flows remain symmetric across the same vEdge. Option A describes SP-facing BGP techniques unrelated to internal vEdge design. Option B is incorrect because SD-WAN does not use HSRP for vEdge redundancy. Option D is not a standard design requirement between co-located vEdges.

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