Arista CAB-Q-Q-100G-1-5-Arista | 100G QSFP28 Passive DAC Cable, 1.5m Twinax

Q: What is the maximum distance supported by this cable?
A: The CAB-Q-Q-100G-1-5 is designed for 1.5-metre interconnects, making it ideal for short-reach connections within the same rack or between adjacent racks in data centre environments.

Q: Is this cable compatible with non-Arista switches?
A: This cable is designed and tested for Arista switches with 100G QSFP28 ports. While passive DAC cables may work with other vendors, compatibility should be verified. Some resellers offer EEPROM recoding services for cross-vendor use.

Q: Does this cable require any external power or licensing?
A: No, this is a passive copper cable that draws minimal power (max 0.5W per end) directly from the switch port. No external power supply, active components, or software licenses are required.

Q: What are the advantages of DAC cables over optical transceivers?
A: Passive DAC cables offer significant cost savings, lower power consumption, and reduced latency compared to optical transceiver modules. They are ideal for short-distance, high-density interconnects within and between racks.

Q: Can this cable be used for 4x25G breakout applications?
A: This specific cable is a QSFP28 to QSFP28 configuration for native 100G links. For 4x25G breakout, you would need a CAB-Q-4S-100G series breakout cable that splits one 100G QSFP28 into four 25G SFP28 connections.