When replacing afabric interconnectin a Cisco Unified Computing System (UCS), the recommended procedure tominimize traffic disruptionis touse the fabric evacuation procedure on the subordinate fabric interconnect. This ensures that traffic is redirected to the other (active) fabric interconnect, allowing the system to maintain connectivity while one interconnect is replaced.
High availability should remain enabled to preserve redundancy.
Powering down both interconnects would cause a complete outage.
Disconnecting cables without graceful evacuation can result in traffic loss.
[Reference:Supporting Cisco Devices for Field Technicians (FLDTEC) – Maintenance and RMA Procedures, ===========]
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