Managing OmniSwitch 6250 Series Stacks Stack Cabling
OmniSwitch 6250 Series Hardware Users Guide September 2009 page 6-17
Preliminary
9/28/09
Stack Cabling
Switches in a stack are connected to each other by stacking cables. These stacking cables provide high-
speed, dual-redundant links between switches in a stack.
Stacking cables for OmniSwitch 6250 Series switches must be connected in an A-B pattern. In other
words, the cable connected to stacking port A of one switch must be connected to stacking port B of the
adjacent switch. 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 effective failover in
the event of a sta cking link or module failure within the stack.
The diagram below shows the required stacking cable pattern. For detailed information on assembling a
stack and connecting the cables, refer to Chapter 2, “OmniSwitch 6250 Series Chassis and Hardware
Components.”
Note. When planning the stack cabling configuration, keep in mind that the switch connected to stacking
port A of the primary switch will be assigned the secondary management role by default.
Example of Stacking Cable Pattern (Chassis Rear Panels Shown)
A stack of eight switches in a crossed (stacking port
A to stacking port B) configuration. Note that a
redundant stacking cable connection exists between
the top and bottom switches. This connection is
required for effective redundancy across the stack.
A B
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