Which three statements about the high availability of Cisco Unified Intelligent Contact Management central controller are valid? (Choose three.)

Question

Options

• AIf one ICM call router of a duplex pair of Cisco Unified ICM call routers fails, the surviving ICM call
• BDuring Cisco Unified ICM call router failover processing, calls in progress in Cisco Unified
• CIf ICM Logger side A fails, the impact of call processing is limited to ICM call router side A.
• DIf ICM Logger side A fails, router side B cannot send historical info to ICM Logger side A and is
• EThere is no impact on call processing during a Cisco Unified ICM Logger failure.
• FIf the private LAN fails, the peripheral gateways are used to help determine the active call router
• GIf ICM Logger side B fails, the ICM Router side B cannot send real-time and historical info to

• A
  81% (17)
• B
  5% (1)
• D
  5% (1)
• G
  10% (2)

Explanation

Option A is correct because Cisco Unified ICM is designed as a duplex (paired) architecture - if one call router fails, the surviving router seamlessly takes over all call processing, which is the core HA mechanism. Option E is correct because the ICM Logger is not in the call-processing path; it only handles data logging (real-time and historical statistics to the database), so a Logger failure has zero impact on routing decisions. Option F is correct because the private LAN connects the two routers for synchronization; if it fails, both routers could believe they are the active unit (split-brain), so the Peripheral Gateways act as tie-breakers/arbiters to identify which router should be authoritative.

Why the distractors are wrong: Options C and D are incorrect because they imply a Logger failure does impact call processing - C by limiting impact to Router A, D by suggesting Router B is affected - but since Loggers are outside the routing path, neither router's call processing is impaired by any Logger failure. Option G is wrong for the same reason: Router B logging to Logger B is a data function, not a routing function, so losing that connection doesn't disrupt call handling. Option B is incorrect because during router failover, the surviving router continues processing; calls in progress are handled by the active surviving router.

Memory tip: Think of Routers as "traffic cops" (in the call path) and Loggers as "paperwork clerks" (out of the call path) - losing a clerk never stops traffic. And if the two traffic cops lose radio contact (private LAN down), they call the PGs to vote on who's in charge.

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