Under which circumstance(s), can the Public/Visible network share the WAN with the Private network in the Cisco UCCE Clustering over the WAN deployments?

Question

Options

• ASONET WAN with multiple edge devices per Data Center to connect to the SONET ring
• Bunder no circumstances
• CMPLS WAN with a single edge device per Data Center that connects to multiple 1 Gbps WAN
• DMPLS WAN with multiple 1 Gbps WAN circuits and a fast 100 ms Round Trip latency between

• A
  5% (2)
• B
  81% (34)
• C
  5% (2)
• D
  10% (4)

Explanation

In Cisco UCCE Clustering over WAN (CoW) deployments, the Private network carries critical inter-cluster traffic - SQL replication, heartbeats, and internal signaling - and must always remain physically or logically isolated from the Public/Visible network due to strict security and reliability requirements mandated by Cisco's design guidelines; there are no exceptions to this rule.

Option A is wrong because SONET with multiple edge devices is a valid CoW WAN topology, but WAN technology type and the number of edge devices have no bearing on the separation requirement - they are orthogonal concerns. Option C is wrong for the same reason: MPLS with a single edge device is a supported configuration, but single vs. multiple edge devices does not unlock network sharing. Option D is wrong because neither available bandwidth (1 Gbps circuits) nor meeting a latency threshold (and note: 100 ms RTT actually exceeds Cisco's typical CoW latency ceiling, making this option doubly incorrect) creates an exception to the isolation rule.

Memory tip: Think of it as "Private means private - always." In UCCE CoW, no WAN technology, circuit count, speed, or latency figure can override the hard rule that the Private network never shares the WAN with the Public/Visible network.

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