Ruckus ICX 7850 Switch Hardware Installation Guide
37
Part Number: 53-1005580-01
Mounting the Device
Connecting Devices in a Stack
Stacking Cables
Use QSFP28 direct-attached copper stacking cables or QSFP28 optics with fiber cables to connect the Ruckus ICX 7850 devices in a
stack.
NOTE
Stacking cables are not included in the shipping carton and must be ordered separately.
Stack Size
A traditional stack can contain a maximum of twelve Ruckus ICX 7850 devices that are any combination of 7850-32Q, 7850-48F, or
7850-48FS. A stack cannot contain other device types.
Stacking Topologies
Both linear and ring topologies are supported in a stack. In a linear stack topology, there is a connection between each switch that carries
two-way communications across the stack.
For example, in a four-unit stack using a linear topology, unit 1 connects to unit 2, unit 2 to unit 3, and unit 3 to unit 4.
shows a supported three-unit linear stacking topology using the 100-GbE stacking ports on Ruckus ICX 7850-48FS
switches.
FIGURE 30
100-GbE Linear Stacking Topology
In a ring stack topology, there is an extra connection between the logical first and last devices, forming a “ring” or “closed-loop.” The
closed-loop connection provides a redundant path for the stack link, so if one link fails, stack communications can be maintained.
For example, in a three-unit stack using a ring topology, unit 1 connects to unit 2, unit 2 connects to unit 3, and unit 3 connects to unit 1.
shows a supported ring stacking topology using the 100-GbE stacking ports on Ruckus ICX 7850-48F switches.
