Arista CAB-Q-Q-1M-Arista | 40G QSFP+ Transceiver, Passive DAC Cable, 1m

Q: What is the maximum reach of the CAB-Q-Q-1M cable?
A: This passive DAC cable is designed for 1-meter connections, suitable for within-rack or adjacent rack connectivity in data centers. For longer distances beyond 3 meters, active optical cables or fiber transceivers are recommended.

Q: Is this cable compatible with other vendor equipment?
A: While designed for Arista switches and routers with QSFP+ ports, this cable follows industry standard specifications (IEEE 802.3ba and QSFP+ MSA). Third-party compatible versions are available that work with multi-vendor environments including Cisco, Juniper, and Dell equipment.

Q: Can this cable be used for 4x10G breakout connections?
A: No, the CAB-Q-Q-1M is a QSFP+ to QSFP+ cable for 40G to 40G connections only. For 40G to 4x10G breakout applications, you would need a CAB-Q-S-series cable that connects QSFP+ to four SFP+ connectors.

Q: What is the advantage of using a passive DAC cable versus fiber optics?
A: Passive DAC cables offer a more cost-effective solution for short-distance connections, requiring no additional transceivers and consuming less power. They provide reliable 40 Gbps connectivity with lower latency, making them ideal for intra-rack and adjacent rack applications within data centers.

Q: Does this cable require any special configuration on Arista switches?
A: No special configuration is required. The cable is pre-programmed with the necessary EEPROM data and is automatically recognized by compatible Arista switches when inserted into QSFP+ ports. The interface will auto-negotiate to 40GBASE-CR4 operation.