Stack Cabling
Managing OmniSwitch 6850/6850E Series Stacks
page 6-18
OmniSwitch 6850/6850E Series Hardware Users Guide
June 2011
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.
Stacking Cables
Stacking cables for 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 addi-
tion, 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 effective 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.)
