Arista DCS-7816LR3-FM | 7800R3 Fabric Module for 7816L Chassis, Hot-Swappable

Q: What chassis is the DCS-7816LR3-FM compatible with?
A: The DCS-7816LR3-FM is specifically designed for the Arista DCS-7816L modular chassis. Six fabric modules are required per 7816L chassis, populating fabric slots 1-6. It is not compatible with the standard DCS-7816 chassis, which requires the DCS-7816R3-FM module instead.

Q: Can the DCS-7816LR3-FM be replaced without system downtime?
A: Yes, the DCS-7816LR3-FM is hot-swappable and supports graceful degradation. This means the chassis continues forwarding traffic even during fabric module maintenance or replacement, making it suitable for mission-critical data center environments requiring continuous uptime.

Q: What is the difference between DCS-7816LR3-FM and DCS-7816R3-FM?
A: The DCS-7816LR3-FM is designed for the DCS-7816L chassis and requires 6 modules per chassis. The DCS-7816R3-FM is for the standard DCS-7816 chassis and requires 12 modules. The 7816L chassis is optimized for lower fabric density deployments, while the 7816 supports higher line card configurations.

Q: What is the role of fabric modules in the 7800R3 architecture?
A: Fabric modules interconnect all line cards in a non-blocking architecture, spreading data packets across multiple links for full fabric capacity utilization. The 7800R3 provides 100% efficient connectivity from any port to any other port with active-active redundancy and no packet drops.

Q: Are the fan modules in the DCS-7816LR3-FM user-serviceable?
A: Yes, the DCS-7816LR3-FM includes 16 individually serviceable fan modules that can be replaced without taking the system offline, supporting continuous operation during maintenance activities and ensuring flexible, redundant cooling for the fabric module.