Brocade Communications Systems ICX 6610 Installation Manual page 51

Connecting devices in a mixed stack
FIGURE 39 Topology 2: Dual ring
Topology 3: Linear and ring
In the following figure, two ICX 6610 devices form the backbone, and there are six ICX 6450 peripheral devices in two substacks. Each
substack contains three peripheral devices.
One substack is connected to one ICX 6610 device to form a linear topology. The other substack is connected to each of the ICX 6610
devices to form a ring topology.
Topology 3 is almost identical to topology 2, except that the "horizontal" substack is not connected to the second ICX 6610 device,
either by design or because the link is broken. This is still a valid topology.
Brocade ICX 6610 Stackable Switch Hardware Installation Guide
53-1003620-03 51