Arista CAB-Q-S-2M-Arista | 40G QSFP+ to 4x 10G SFP+ Breakout DAC Cable, 2m

Q: What devices is the CAB-Q-S-2M compatible with?
A: This cable is designed for use with Arista switches and routers featuring 40G QSFP+ and 10G SFP+ ports. It enables a single 40G port to break out into four independent 10G connections for flexible network architecture design.

Q: What is the maximum transmission distance for this cable?
A: This is a 2-metre passive copper direct attach cable designed for short-reach connections within racks or adjacent equipment. For longer distances, active optical cables or fibre transceivers should be used.

Q: Does this cable require external power?
A: No, the CAB-Q-S-2M is a passive direct attach cable that draws power from the host ports and requires no external power supply, making it energy-efficient and simple to deploy.

Q: Can I use this cable to connect switches from different vendors?
A: This cable is coded specifically for Arista equipment. Cross-vendor compatibility depends on whether the receiving equipment accepts Arista-coded cables. Some compatible third-party cables support dual coding for mixed-vendor environments.

Q: What is the typical use case for this breakout cable?
A: The CAB-Q-S-2M is ideal for connecting a 40G switch port to four separate 10G devices such as servers or access switches, providing a cost-effective way to maximise port utilisation in data centre and enterprise networks.