Arista CAB-Q-Q-100G-2-5-Arista | 100G QSFP28 Passive DAC Cable, 2.5m Twinax

Q: What is the maximum distance supported by this passive DAC cable?
A: This passive direct attach copper cable is designed for short-reach applications up to 2.5 meters. It is ideal for connecting equipment within the same rack or across adjacent racks in data centers.

Q: Is this cable compatible with Arista switches?
A: Yes, the CAB-Q-Q-100G-2-5 is specifically designed for Arista QSFP28 100G ports and is fully compatible with Arista's switching platforms that support QSFP28 interfaces. It complies with QSFP28 MSA standards ensuring interoperability.

Q: What are the power requirements for this cable?
A: This passive copper cable has very low power consumption, typically 0.5-1.5W per connector end, and requires 3.3V supply voltage. It is significantly more power-efficient than active optical cables or transceivers for short-distance connectivity.

Q: Can this cable be used for 40G Ethernet applications?
A: While this cable is optimized for 100G Ethernet (100GBASE-CR4), compatibility with 40G applications depends on the specific switch configuration and capabilities. Consult Arista's transceiver and cable compatibility guide for your specific platform.

Q: What is the difference between passive and active DAC cables?
A: Passive DAC cables like this one have no signal amplification and are designed for shorter distances up to 5 meters, making them more cost-effective and power-efficient. Active DAC cables include signal amplification and can support longer distances up to 7-15 meters but consume more power.