An architect is designing a VMware Cloud Foundation (VCF) solution. The following information was gathered during the assessment phase: - There is a critical application used by the Finance Team…

Question

Options

• AConfigure multiple static routes on Tier-1 gateway.
• BConfigure Tier-0 gateway for eBGP and ECMP.
• CEnable BFD on the Tier-0 gateway.
• DConfigure Tier-1 gateway for eBGP and ECMP.
• EInstall and configure hosts with 100Gbps physical NICs.

• A
  11% (6)
• B
  81% (44)
• D
  6% (3)
• E
  2% (1)

Explanation

Designing for "five nines" (99.999%) availability in a VMware Cloud Foundation (VCF) environment requires a network architecture that minimizes convergence time and eliminates single points of failure. For a critical application sensitive to network changes, the connection between the virtualized SDDC and the physical network must be highly resilient and capable of near-instantaneous failover. The Tier-0 Gateway is the primary interface for North-South traffic. To meet high availability requirements, the Tier-0 should be configured with eBGP (External Border Gateway Protocol) to peer with physical Top-of-Rack (ToR) switches. By enabling ECMP (Equal Cost Multi-Pathing), the architect allows the Tier-0 to utilize multiple active paths to the physical world simultaneously. This not only increases available bandwidth but also ensures that if one physical link or router fails, traffic is immediately redistributed across the remaining active paths without a protocol To complement ECMP, BFD (Bidirectional Forwarding Detection) is essential. While BGP's default keepalive and hold timers are often measured in seconds (typically 60 and 180 seconds, respectively), BFD provides sub-second failure detection. In a VCF environment, BFD operates as a lightweight "heartbeat" between the Tier-0 Edge nodes and the physical ToR routers. If a path fails, BFD detects it within milliseconds and notifies BGP to pull the failed path from the routing table. This combination of eBGP/ECMP for path redundancy and BFD for rapid detection is the verified standard for VCF designs requiring extreme uptime and sensitivity to network

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