• Arista ADPT-O-Q-100G OSFP-to-QSFP28 100G adapter with silver SFP+ modules
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Arista

Arista CAB-D-2Q-200G-2.5 | 200G QSFP-DD to 2x 100G QSFP28 Breakout DAC, 2.5m

CAB-D-2Q-200G-2.5

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Description

This Arista 200GBASE-CR8 breakout direct attach cable splits one 200G QSFP-DD port into two 100G QSFP28 connections over a 2.5 metre length. It suits short-reach top-of-rack and in-rack links where a single QSFP-DD switch port needs to feed two 100G servers or switches, including migration from legacy 100G equipment.

The cable is passive twinax copper, so it needs no external power. On the switch end, the QSFP-DD port runs at 200G using 8 x 25G NRZ electrical lanes, which is what lets the two QSFP28 connectors on the far end each carry 100G (100GBASE-CR4). The 2.5 m run covers adjacent racks or mid-rack placements where shorter lengths fall short.

The QSFP-DD port must be configured for 200G using 8 x 25G NRZ electrical lanes. The cable interoperates with legacy 100G QSFP and 25G SFP ports, and supported platforms are listed in Arista's Transceiver and Cable Guide.

Enquire with XS Network Tech for new or used pricing and availability.

Features

- Breakout from one 200G QSFP-DD port to two 100G QSFP28 ports
- Passive twinax copper construction with no external power
- Interoperates with legacy 100G QSFP and 25G SFP ports when the port is set to 8 x 25G NRZ lanes
- Suited to short-reach top-of-rack and in-rack links
- RoHS compliant

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Datasheet

Technical Specifications

- Standard: 200GBASE-CR8 QSFP-DD to 2 x 100GBASE-CR4 QSFP breakout
- Cable type: Passive twinax copper
- Length: 2.5 m
- Connector A: 1 x QSFP-DD
- Connector B: 2 x QSFP28 (100G)
- Electrical configuration: 8 x 25G NRZ lanes on the QSFP-DD port
- Interoperability: legacy 100G QSFP and 25G SFP ports
- External power: Not required (passive)
- RoHS: Compliant with 2015/863/EU Commission Delegated Directive

FAQs

Q: What does the QSFP-DD port need to be configured for?
A: The QSFP-DD port must be configured for 200G using 8 x 25G NRZ electrical lanes. This allows each QSFP28 connector to carry 100G.

Q: Does this cable need external power?
A: No. It is a passive twinax copper cable and draws no external power.

Q: Will it work with older 100G equipment?
A: Yes. It interoperates with legacy 100G QSFP and 25G SFP ports, which makes it useful for migrating from existing 100G gear.

Q: Which platforms support this cable?
A: Supported platforms are listed in Arista's Transceiver and Cable Guide. Check your switch model there before ordering.

Q: How is this different from other lengths of the same cable?
A: This SKU is the 2.5 m version of the QSFP-DD to 2x 100G QSFP28 breakout. The same cable type is also offered in 1 m and 2 m lengths.

Datasheet

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