• Silver-colored arista sfp+ transceiver modules with blue handles and metal connectors for 400g osfp dac cable use
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Arista

Arista CAB-O-O-400G-2M | 400G OSFP DAC Cable, 400GBASE-CR8, 8x50G PAM-4, 2m

Arista CAB-O-O-400G-2M | 400G OSFP DAC Cable, 400GBASE-CR8, 8x50G PAM-4, 2m

CAB-O-O-400G-2M

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Description

The Arista CAB-O-O-400G-2M is a 400GBASE-CR8 passive Direct Attach Copper (DAC) twinax cable delivering 400Gbps between OSFP ports over a 2-metre length. Designed for high-density data centre and HPC interconnects, it uses 8 lanes of 50Gbps PAM-4 signalling to achieve full 400G throughput with no active components — minimising power consumption and eliminating optics qualification cycles. Fully compliant with IEEE 802.3cd and natively integrated with Arista EOS (4.23.0+) and CloudVision for plug-and-play deployment.

With hot-swappable OSFP connectors on both ends and CMIS management interface compliance, this cable suits top-of-rack and spine-leaf 400G fabric builds where short-reach copper is preferred over optical. It is backed by Arista's hardware warranty and support ecosystem, and is available alongside 1m and 3m variants for flexible cabling layouts. Available now at iptrading.com.au — competitive prices and local support.

Features

- Passive DAC design — no active components, significantly lower power draw versus optical transceivers
- Plug-and-play operation with full native integration with Arista EOS and CloudVision
- Hot-swappable OSFP connectors for maximum uptime and simplified field servicing
- IEEE 802.3cd (400GBASE-CR8) compliant — open standards interoperability
- CMIS management interface standard compliant for unified cable and transceiver management
- Ideal for high-density 400G data centre fabric, HPC, and top-of-rack interconnects
- Available in 1m, 2m, and 3m variants for flexible deployment within and between racks
- Fully backed by Arista support — eliminates third-party optics qualification cycles

Warranty

Arista hardware products come with a 1-year limited hardware warranty, covering defects in materials and workmanship under normal use.
Extended Warranty Options:
IP Trading offers tailored extended warranty solutions and support packages for Arista products. Contact our team to explore options that align with your organisation's needs.
https://www.arista.com/assets/data/pdf/Warranty.pdf

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

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Technical Specifications

FAQs

Datasheet

Technical Specifications

- Data Rate: 400Gbps (400GBASE-CR8)
- Form Factor: OSFP to OSFP (both ends)
- Cable Type: Passive Twinax Copper (DAC)
- Cable Length: 2 metres
- Electrical Interface: 8 lanes x 50Gbps PAM-4
- Connector: OSFP (Octal Small Form-factor Pluggable)
- Standards Compliance: IEEE 802.3cd (400GBASE-CR8)
- Management Interface: CMIS compliant
- Minimum EOS Version: 4.23.0
- Cable Construction: Passive twin-ax copper (no active components)

FAQs

Q: What switch ports does the CAB-O-O-400G-2M connect to?
A: This cable has OSFP (Octal Small Form-factor Pluggable) connectors on both ends, making it suitable for connecting Arista switches and servers that feature OSFP ports operating at 400G, such as those found in Arista's 7800 and 7060 series platforms.

Q: Is this an active or passive cable?
A: It is a passive Direct Attach Copper (DAC) cable. There are no active components, which means lower power consumption, no signal regeneration latency, and reduced cost compared to active optical cables or discrete transceivers.

Q: What is the maximum reach of this cable?
A: As a passive twinax copper DAC, this cable is rated for 2 metres. Arista offers the same cable in 1m and 3m variants. For longer distances, active optical cables (AOC) or 400G optical transceivers would be required.

Q: Is the CAB-O-O-400G-2M compatible with Arista EOS?
A: Yes. This cable is natively supported in Arista EOS version 4.23.0 and later, and integrates fully with Arista CloudVision for unified management and monitoring.

Q: Can I use this cable with non-Arista equipment?
A: The cable is IEEE 802.3cd (400GBASE-CR8) and CMIS compliant, which are open industry standards. While it is optimised and qualified for Arista platforms, it may be compatible with other vendors' OSFP 400G ports — compatibility testing with non-Arista equipment is recommended before deployment.

Q: Can I purchase the Arista CAB-O-O-400G-2M in Australia?
A: Yes. The CAB-O-O-400G-2M is available now through iptrading.com.au. IP Trading is an Australian B2B IT hardware reseller offering competitive pricing and local support for Arista cables, transceivers, and networking equipment.

Datasheet

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