Dell EMC ECS EX Series - Star Topology; Inter-Rack Switch Connectivity - Star Topology

Figure 64 Star topology
The aggregation switch(es) connecting to the intra-rack networks must be set up as a trunk and
allow VLAN traffic to flow between all ports in the inter-rack network.
The inter-rack star topology between EX-Series racks are shown in the following figure.
Figure 65 Inter-rack switch connectivity - star topology
EX300 Platform
86 ECS EXSeries Hardware Guide