At the heart of the 7500E series is the fabric. It interconnects all line cards in a nonblocking architecture irrespective of the traffic pattern providing a full 5.12 Tbps per fabric module. Each line card module connects to the fabric with multiple links and data packets are spread across the links to fully utilize the fabric capacity. Unlike hash-based selection of fabric links, the 7500E architecture provides 100% efficient connectivity from any port to any other port with no drops. The fabric modules are always active-active, provide N+1 redundancy and can be hotswapped with zero performance degradation. The Fabric Modules for the 7508E and the 7504E are different based on the size of the chassis and both integrate a fan assembly for flexible and redundant cooling