Arista CAB-S-S-25G-1M | 25G SFP28 DAC Twinax Cable, 1M, Passive, 25GBASE-CR

Q: What is the maximum distance supported by the CAB-S-S-25G-1M?
A: The CAB-S-S-25G-1M is a 1-metre passive direct attach copper twinax cable. Passive DAC cables are typically suited for distances up to 3–5 metres; this 1-metre variant is ideal for intra-rack or adjacent-rack connectivity in data centre environments.

Q: Is this cable compatible with non-Arista switches?
A: The CAB-S-S-25G-1M is designed and tested for use with Arista 25G SFP28 ports and is fully integrated with Arista EOS. While it complies with SFP28 MSA, SFF-8402, and SFF-8432 standards, Arista recommends using Arista-branded cables to ensure full EOS software support and to avoid optics qualification issues.

Q: Does this cable support 10G as well as 25G?
A: Yes. The CAB-S-S-25G-1M supports dual-rate 10G/25G operation, providing deployment flexibility in environments transitioning from 10G to 25G infrastructure.

Q: What makes a passive DAC cable different from an active DAC or optical transceiver?
A: A passive DAC cable contains no active electronic components, resulting in lower power consumption (max 0.57W per end), lower latency, and lower cost compared to active DAC cables or optical transceivers. The trade-off is a shorter maximum reach, making passive DACs best suited for short in-rack distances.

Q: What use cases are best suited for the CAB-S-S-25G-1M?
A: This cable is ideal for data centre server-to-switch connectivity, Network Attached Storage (NAS), Storage Area Networks (SAN), High Performance Computing (HPC) clusters, and any top-of-rack deployment requiring cost-effective, low-latency 25G interconnects over short distances.

Q: Can I purchase the Arista CAB-S-S-25G-1M in Australia through IP Trading?
A: Yes. IP Trading (iptrading.com.au) is an Australian B2B IT hardware reseller offering authentic Arista networking cables and accessories. Contact the team for pricing, bulk orders, and local availability.