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

Arista CAB-S-S-25G-2M | 25G SFP28 Passive DAC Cable, 25GBASE-CR, 2 Metre

CAB-S-S-25G-2M

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Description

This Arista 25GBASE-CR direct attach cable is a passive twinax copper cable with SFP28 connectors on both ends. It carries 25 Gigabit Ethernet over a 2 metre link and is intended for short-reach connections between a top-of-rack switch and a server NIC, or between switches within a rack or in adjacent racks.

The cable is passive, so it needs no external power. Maximum power draw is listed at 1 W for the SFP/SFP+ class. It is a copper twinax design, which keeps cost and power consumption low compared with optical alternatives at short distances. The 2 metre length is one of the lengths in Arista's 25G SFP DAC family, which runs from 0.5 m to 5 m.

It fits Arista SFP28 (25G SFP) ports. Arista also lists QSFP100-to-4xSFP25 breakout cables and 25G SFP active optical cables in the same family for 100G QSFP ports split into 4x25G. Check the Arista transceiver compatibility matrix for supported platforms and EOS versions.

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

Features

- 25GBASE-CR compliant twinax copper cable
- Passive design with no external power required
- Low-cost, low-power short-reach 25GbE connectivity
- Part of Arista's 25G SFP family, available in 0.5 m, 1 m, 1.5 m, 2 m, 2.5 m, 3 m and 5 m lengths
- Interoperates with 25G SFP ports and with 100G QSFP ports configured as 4x25G via breakout cables

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

- PHY type: 25GBASE-CR
- Data rate: 25 Gigabit Ethernet
- Connector type: SFP28 (SFP form factor) on both ends
- Cable type: Passive twinax copper
- Cable length: 2 m
- Maximum reach for the 25GBASE-CR SFP-to-SFP cable family: 1 m to 5 m
- Maximum power: 1 W (SFP/SFP+ class)
- SFP form factor dimensions (H x W x D): 8.55 x 13.7 x 56.5 mm
- Operating case temperature: 0 to 70 C
- Storage temperature: -40 to 70 C
- Relative humidity: 5 to 95%
- Operating altitude: 0 to 10,000 ft
- Wavelength: not applicable (copper)

FAQs

Q: Does this cable need a licence or external power?
A: No. It is a passive twinax copper cable with no external power requirement and no licensing.

Q: Which ports does it connect to?
A: It has SFP28 connectors on both ends and fits Arista SFP28 (25G SFP) ports. Check the Arista transceiver compatibility matrix for supported platforms and EOS versions.

Q: What is the maximum distance for this type of cable?
A: The 25GBASE-CR SFP-to-SFP cable family supports reaches of 1 m to 5 m. This SKU is a 2 metre cable.

Q: How does it differ from the other cables in the same family?
A: The cables share the same 25GBASE-CR SFP28 design and differ by length. This SKU is the 2 metre version, with other lengths from 0.5 m to 5 m available under separate part numbers.

Q: Can it be used on a 100G QSFP port?
A: Not directly. This cable has SFP28 connectors at both ends. To connect a 100G QSFP port as 4x25G, Arista lists separate QSFP100-to-4xSFP25 breakout cables in the same family.

Datasheet

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