Arista DCS-7260CX3-64E-R | 7260X3 64-Port 100G Switch, 2x 10G SFP+, 12.8 Tbps

Q: What is the difference between the DCS-7260CX3-64E-R and the standard DCS-7260CX3-64-R?
A: The 64E model features enhanced power and cooling capability, supporting 4.5W optics on all 64 ports and up to 5W on select ports when used with 1900W power supplies and high-speed fans, whereas the standard model uses 750W PSUs with lower optic power limits.

Q: Can the QSFP28 ports support lower speeds like 10G or 25G?
A: Yes, each QSFP28 port supports flexible breakout configurations for 10G, 25G, 40G, 50G, and 100G operation. You can use the ports as 64x 100GbE, 128x 50GbE, or even more 10G/25G ports with appropriate breakout cables and transceivers.

Q: What deployment scenarios is the DCS-7260CX3-64E-R best suited for?
A: This switch is optimized for high-density 100GbE leaf or spine deployments in data centers, high-frequency trading platforms, AI/ML infrastructure, big data analytics, and cloud environments requiring ultra-low latency, high throughput, and predictable performance.

Q: Does the switch support Layer 3 routing and advanced features?
A: Yes, the switch runs Arista EOS and offers full wire-speed Layer 2 and Layer 3 forwarding, VXLAN, BGP/OSPF routing, MLAG, LANZ buffer analytics, advanced QoS, and software-defined networking features for modern cloud and data center architectures.

Q: What is the significance of the 42MB packet buffer?
A: The 42MB shared buffer with Dynamic Buffer Allocation intelligently manages micro-bursts and congestion by dynamically assigning memory across ports based on traffic class and QoS policy, ensuring lossless traffic handling and optimized performance under variable workloads.