How should a data-center optical interconnect rate be selected?
Start with server, top-of-rack, Leaf and Spine bandwidth and host-port support, then plan the migration path across 100G, 400G and 800G optics.
Data Center Interconnect
Data Center Optical Interconnect and Spine-Leaf Expansion
Select optical transceivers for data centers across server access, top-of-rack, Leaf-Spine, aggregation and inter-room links by reach, fiber and host capability.
Selection FAQ
Scenario selection questions
How do SR, DR, FR and LR differ?
They represent different fiber, connector, PMD and reach directions; confirm the exact model specification.
Must existing cabling be audited?
Yes. Confirm fiber grade, MPO polarity, LC/CS interfaces, patch panels, loss and host FEC before upgrade.
Typical Scenarios
Typical deployment positions
01
Server and top-of-rack access
Match NIC and switch ports with fixed short-reach links.
02
Leaf-Spine expansion
Plan rate transitions and coexistence across 100G, 400G and 800G.
03
Inter-room and campus links
Use the fiber plant and link budget to select FR or LR directions.
Selection Guide
Scenario selection priorities
Existing port rates and upgrade path
MMF, SMF or direct attach
Reach and optical budget
Multi-vendor host validation
Recommended Products
Recommended product directions
400G Optical Transceivers → 400G Optical Transceivers covering 400G QSFP-DD SR8, 400G OSFP SR4, 400G QSFP112 SR4, 400G QSFP-DD DR4, 400G QSFP-DD FR4, 400G QSFP-DD LR4 and related cable directions. Includes 400G QSFP-DD, OSFP and QSFP112 transceivers for data-center and high-speed interconnect planning. 100G and 200G Optical Transceivers → 100G and 200G Optical Transceivers covering 100G QSFP28 SR4, 100G QSFP28 PSM4, 100G QSFP28 DR1, 100G QSFP28 FR1, 100G QSFP28 CWDM4, 100G QSFP28 LR1 and related cable directions. Compare 100G and 200G optical transceivers, including 100G QSFP28 and 200G QSFP56 directions, without assuming the combined page is a permanent split point.
25G SFP28 Transceivers
25G SFP28 DAC
SFP28 to SFP28 Custom length
100G and 200G Optical Transceivers
100G QSFP28 DR1
Duplex LC 500m
100G and 200G Optical Transceivers
100G QSFP28 FR1
Duplex LC 2km
100G and 200G Optical Transceivers
100G QSFP28 LR1
Duplex LC 10km
100G and 200G Optical Transceivers
100G QSFP28 AOC
QSFP28 to QSFP28 Custom length
100G and 200G Optical Transceivers
100G QSFP28 PSM4
MPO-12 500m
Related Solutions
Technical solutions for this application
High-Speed Optical Interconnect Solutions
High-Speed Optical Interconnect Solutions
100G–800G modules and links
View solution →Long-Reach Optical Transmission
Long-Reach Optical Transmission
2km / 10km / 40km+
View solution →Compatibility Validation
Compatibility Validation
Multi-vendor samples and rollout
View solution →Selection Guides
Technical guides for this application
400G DR4 vs FR4 vs LR4
Compare 500m, 2km and 10km directions before selecting the product model.
Read guide →100G QSFP28 reach selection
Compare 100m, 500m, 2km and 10km fiber and connector conditions.
Read guide →Optical link budget calculation
Break down fiber, connectors, margin and receiver windows before acceptance.
Read guide →Optical transceiver procurement checklist
Prepare host, compatibility, sample and batch-acceptance fields.
Read guide →