What Is Fiber Trunk Migration?_
The activity occurs when racks are added, removed, or reconfigured and the existing trunk paths no longer match the new topology. Crews disconnect the MPO or other push-pull connectors at each end, route the new or relocated trunk through the overhead or under-floor pathway, and re-terminate to the correct ports on the leaf or spine switches. Because the trunks carry only the scale-out network, they remain separate from any intra-rack copper NVLink connections.
Technical Details
Trunks are typically multi-fiber assemblies whose exact strand count and polarity follow the OEM or relevant standard documentation for the installed transceiver type. Mating relies on push-pull latching; no torque screws are used. After physical movement, crews perform continuity and polarity checks with an optical loss test set before the links are brought into the fabric. Any bend-radius or slack-management requirements are taken from the cable manufacturer’s installation guide.
How Leviathan Systems Works with Fiber Trunk Migration
Field teams execute fiber trunk migrations during phased rack additions or technology refreshes when the scale-out fabric must be extended or rebalanced without disturbing the copper NVLink spine inside each rack.
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