To ensurehigh availability and fault tolerancein Cisco data center designs, two effective strategies include:
Redundant Supervisor Engines and Fabric Modules: These provide failover capabilities, so if one supervisor or fabric module fails, another can take over, maintaining network operations without interruption.
Virtual Port Channels (vPCs): vPCs allow connections to be made to two physical switches while appearing as one logical switch. This prevents loops and adds redundancy and load balancing, which is critical in high-availability environments.
Other options may enhance performance (e.g., high-density Ethernet) or extend functionality (e.g., FCIP), but do not directly contribute to fault tolerance and high availability in the same way.
[Reference:Supporting Cisco Devices for Field Technicians (FLDTEC) – Cisco Equipment and Related Hardware, ]
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