200-155 · Question #56
A Cisco DCS administrator is ready to cable two newly racked Fabric Interconnects. Which two cabling configurations should be used for the heartbeat connectivity? (Choose two.)
The correct answer is B. Connect the Layer 2 port of Fabric Interconnect A to the Layer 2 port of Fabric Interconnect B. C. Connect the Layer 1 port of Fabric Interconnect A to the Layer 1 port of Fabric Interconnect B. Cisco UCS Fabric Interconnects require both Layer 1 and Layer 2 direct connections for heartbeat connectivity to ensure proper clustering and high availability.
Question
A Cisco DCS administrator is ready to cable two newly racked Fabric Interconnects. Which two cabling configurations should be used for the heartbeat connectivity? (Choose two.)
Options
- AConnect the Layer 1 portal Fabric Interconnect Ala me Layer 2 port of Fabric Interconnect B.
- BConnect the Layer 2 port of Fabric Interconnect A to the Layer 2 port of Fabric Interconnect B.
- CConnect the Layer 1 port of Fabric Interconnect A to the Layer 1 port of Fabric Interconnect B.
- DKeep the Layer 2 port of both Fabric Interconnects disconnected.
- EConnect the Layer 2 port of Fabric Interconnect A to the Layer 1 port of Fabric Interconnect B.
How the community answered
(51 responses)- A2% (1)
- B90% (46)
- D4% (2)
- E4% (2)
Why each option
Cisco UCS Fabric Interconnects require both Layer 1 and Layer 2 direct connections for heartbeat connectivity to ensure proper clustering and high availability.
Connecting a Layer 1 port to a Layer 2 port between Fabric Interconnects is an incorrect cabling configuration for heartbeat or management connectivity.
The Layer 2 port (often labeled MGMT or MGMT 2) of Fabric Interconnect A must be connected to the Layer 2 port of Fabric Interconnect B to establish the Layer 2 heartbeat, which is crucial for cluster communication, state synchronization, and failover.
The Layer 1 port (often labeled CLUSTER or MGMT 1) of Fabric Interconnect A must be connected to the Layer 1 port of Fabric Interconnect B to establish the Layer 1 heartbeat, providing a dedicated physical link for cluster control signals and fault detection.
Keeping the Layer 2 port disconnected would prevent the establishment of the necessary Layer 2 heartbeat, which is vital for cluster communication and high availability, leading to a non-functional or unstable cluster.
Connecting a Layer 2 port to a Layer 1 port between Fabric Interconnects is an incorrect cabling configuration for heartbeat or management connectivity.
Concept tested: Cisco UCS Fabric Interconnect heartbeat cabling
Source: https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/hw/install/fabric_interconnect_6200/6200_install/cluster_fi_6200.html
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