Arista DCS-7289R3AK-SC | 7280R3A 48-Port 400G Switch Card, 16GB Buffer, MACsec

Q: What is the difference between R3A, R3AM, and R3AK switch cards?
A: The R3A is the standard switch card, the R3AM adds enhanced MACsec encryption, and the R3AK provides both enhanced MACsec encryption and large-scale routing resources supporting up to 5 million routes via FlexRoute engine, making it ideal for internet peering and MPLS applications.

Q: How many interface modules can I install with this switch card?
A: The DCS-7289R3AK-SC connects to 9 I/O module slots in the 7289 chassis, allowing flexible configurations of up to 36 ports of 400G, 144 ports of 100G, or 144 ports of 25G depending on the interface modules installed. Each module connects directly without oversubscription.

Q: What deployment scenarios is the 7289R3AK-SC best suited for?
A: This switch card excels in data center spine architectures, internet peering points requiring large routing tables, content delivery networks with high burst traffic, high-performance storage environments, data center interconnect with encryption requirements, and AI/ML clusters requiring deterministic low-latency performance.

Q: Does this switch card come with power supplies?
A: No, the DCS-7289R3AK-SC is a spare switch card that includes hot-swappable fans but does not include power supplies. The 7289 chassis supports up to 4 hot-swappable AC or DC power supplies which must be ordered separately.

Q: What advanced features does the R3AK variant support?
A: The R3AK supports Algorithmic ACLs for flexible policy enforcement, TunnelSec for strong encryption at Layer 2 and Layer 3, internet-scale routing with FlexRoute, EVPN-VXLAN overlay networking, Segment Routing, MPLS services, precision timing with PTP and SyncE, and advanced telemetry via Accelerated sFlow and Inband Network Telemetry.