To connect two switches with fiber, each switch must have SFP or SFP+ ports compatible with the fiber type (single-mode or multi-mode) and distance requirements . For short distances (under 25 meters), multi-mode fiber is typically sufficient . Each fiber cable should be terminated with the appropriate connector type, usually LC connectors, which are standard for most SFP modules .
Using two fiber cables between switches allows for redundancy. To avoid network loops, these cables can be configured as a Layer 2 EtherChannel (also called port-channel), which aggregates the links into a single logical connection. If one fiber link fails, traffic automatically continues over the other link without manual intervention . This setup also increases the effective bandwidth between switches.
Connecting two fiber optic cables to a Layer 2 switch is feasible and commonly used for redundancy and higher throughput. Use compatible SFP modules, LC-terminated fiber cables, and configure the links as an EtherChannel to ensure loop-free, resilient, and high-speed connectivity between switches .
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