Arista DCS-7508R-FM | 7500R Fabric Module for 7508/7508N Chassis, 5+1 Redundancy

Q: How many DCS-7508R-FM modules are required for a 7508 chassis?
A: The 7508 and 7508N chassis require six fabric modules for full redundancy. The modules are installed in fabric slots 1-6 and operate in a 5+1 redundancy configuration, meaning the system can function with five modules while one provides redundancy for failover protection.

Q: Is the DCS-7508R-FM compatible with other Arista 7500 Series chassis?
A: The DCS-7508R-FM is specifically designed for the 7508 and 7508N chassis only. Other chassis models in the 7500R Series, such as the 7504, 7512, and 7516, require their own corresponding fabric modules (DCS-7504R-FM, DCS-7512R-FM, DCS-7516R-FM respectively).

Q: Can the fabric modules be hot-swapped without disrupting network operations?
A: Yes, the DCS-7508R-FM is designed for hot-swap operation. Thanks to the 5+1 redundancy configuration, you can replace a faulty fabric module without taking the chassis offline or interrupting network traffic, ensuring continuous operation and simplified maintenance.

Q: What is the power draw of each fabric module?
A: Each DCS-7508R-FM module draws 224W under typical operating conditions and up to 298W at maximum load. When planning power budgets for a fully equipped 7508 chassis with six fabric modules, supervisors, line cards, and power supplies, total system power can range significantly depending on the specific line cards installed.

Q: Does the fabric module include cooling fans?
A: Yes, the DCS-7508R-FM is an integrated fan module that combines fabric connectivity with built-in cooling fans. This design provides front-to-rear airflow that optimizes data center cooling efficiency and ensures proper thermal management for the chassis and installed line cards.