Home > Storage > ObjectScale and ECS > Product Documentation > Dell ECS: Networking Best Practices > Aggregation switches for EXF900
The aggregation switches can be installed in the Dell rack or a customer provided rack. The aggregation switch allows you to connect up to seven racks of EXF900 nodes in the same cluster.
Note: For more information about the network cabling, see the ECS EX Series Hardware Guide and the ECS Networking Guide.