User guide

Stack Cabling Managing OmniSwitch 6850 Series Stacks
page 4-16 OmniSwitch 6850 Series Hardware Users Guide April 2010
Stack Cabling
Switches in a stack are connected to each other by stacking cables. The stacking cables come in various
sizes as listed below and provide high-speed, dual-redundant links between switches in a stack.
OS-6850 Stacking Cables
Stacking cables for OmniSwitch 6850 Series switches can be connected in any pattern. In other words, the
cable connected to stacking port A of one switch can be connected to either stacking port A or stacking
port B of the adjacent switch. However, it is strongly recommended that the cabling pattern remains
consistent across the stack. In addition, for a stack to have effective redundancy, a redundant stacking
cable must be installed between the upper-most and bottom-most switch at all times. This provides effec-
tive failover in the event of a stacking link or module failure within the stack.
The diagram below shows two recommended stacking cable patterns. For detailed information on assem-
bling a stack and connecting the cables, refer to Chapter 2, “OmniSwitch 6850 Series Chassis and Hard-
ware Components.”
Cable Description
OS6850-CBL-30 30 centimeters long stacking cable.
OS6850-CBL-60 60 centimeters long stacking cable.
OS6850-CBL-150 150 centimeters long stacking cable.
OS6850-CBL-300 300 centimeters long stacking cable. (Supported on the 24 port models only.)