Arista DCS-7135LB-48Y4C-R | 7135LB 48-Port 25G SFP28 Switch, 4x 100G QSFP28, FPGA

Q: What is the primary use case for the Arista 7135LB-48Y4C-R?
A: This switch is designed for ultra-low latency applications in financial services, including high-frequency trading, market data distribution, exchange connectivity, and timestamping. It combines Layer 1+ switching, programmable FPGA resources, and precise timing capabilities in a single platform.

Q: What does the -R suffix mean on this model?
A: The -R suffix indicates rear-to-front airflow configuration with dual AC power supplies. This airflow direction is important for proper integration into data center hot/cold aisle designs.

Q: Can the FPGA be programmed with custom applications?
A: Yes, the Xilinx VU9P-3 FPGA can be programmed using Arista development kits and APIs. It supports both Arista network applications like MetaWatch and MetaMux, as well as third-party or custom FPGA applications for specialized processing requirements.

Q: What speeds do the SFP28 and QSFP28 ports support?
A: The 48x SFP28 ports support 10GE and 25GE speeds. The 4x QSFP28 ports support 100GE, 40GE, 4x25GE breakout, and 4x10GE breakout configurations, providing flexible connectivity options.

Q: Is this switch compatible with standard SFP+ and QSFP+ transceivers?
A: Yes, the switch accepts standard SFP+, SFP28, QSFP+, and QSFP28 optics and cables. Arista also offers Enhanced Performance E-Series optics that enable 25G and 100G operation without Forward Error Correction for minimal latency.