Arista CAB-O-8S-400G-3M | 400G OSFP to 8x 50G SFP28 Breakout Twinax DAC, 3m

Q: What is the CAB-O-8S-400G-3M used for?
A: It is a breakout DAC cable that connects a single 400G OSFP port to eight 50GBASE-CR SFP28 ports. This is commonly used in data centre spine-to-leaf cabling where a high-capacity 400G uplink needs to be distributed across multiple 50G downstream devices.

Q: Which Arista switches are compatible with this cable?
A: This cable is designed for Arista platforms with OSFP 400G interfaces, including the 7800R3, 7500R3, 7300X3, and 7050X4 series switches. Always verify the specific line card or port type supports OSFP before ordering.

Q: Is this an active or passive cable?
A: This is a passive Direct Attach Copper (DAC) twinax cable. It requires no power from the host port beyond what is standard for the connector, resulting in lower total system power consumption compared to active optical cables.

Q: Can I use this cable with non-Arista equipment?
A: While designed for Arista platforms, OSFP-to-SFP28 DAC cables may work with other vendors' switches that support OSFP 400G ports with breakout configuration. Compatibility should be verified with the third-party vendor before deployment.

Q: Can I purchase the CAB-O-8S-400G-3M in Australia through IP Trading?
A: Yes. IP Trading (iptrading.com.au) is an Australian B2B IT hardware reseller stocking Arista networking products including DAC and breakout cables. Contact the team for availability, volume pricing, and fast local fulfilment.

Q: What is the maximum reach of this cable?
A: This cable is 3 metres in length, which is typical for passive DAC twinax cables. Passive DAC cables are generally suitable for in-rack and short cross-rack connections. For longer distances, an active optical cable (AOC) or transceiver-based solution would be required.