Stack Cabling Managing OmniSwitch 6350 Stacks
page 7-18 OmniSwitch 6350 Hardware Users Guide April 2017
Redundant stacking cables provide a form of dual redundancy. As shown in the figure above, the
redundant cable allows traffic to flow in the event of a stacking link failure. The redundant cable also
provides failover if a switch goes down within the stack. Traffic continues to flow between the modules
that remain operational, as shown in the diagram below:
Stacking Cable Redundancy: Recovery Following a Switch Failure within the Stack
Checking Redundant Stacking Cable Status
To check whether a redundant stacking cable connection exists between the top-most and bottom-most
switches in the stack, use the show stack status command. For example:
Redundant cable status : present
Tokens used : 1
Tokens available : 31
In this example, a redundant stacking cable connection is present between the top-most and bottom-most
switches in the stack.
Slot 1
Slot 2
Slot 3
Slot 4
Chassis FrontStacking Cables
Data enters slot 1 through an Ethernet port. The
data traverses slot 2 via the stacking cables and
exits slot 3 through one of its Ethernet ports.
1
2
The slot 2 switch goes down unexpectedly.
Data can no longer move through slot 2.
However, because there is a redundant con-
nection (the cable between slot 1 and slot 4),
data immediately traverses slot 4 and then
exits slot 3 to its destination.
Slot 1
Slot 2
Slot 3
Slot 4
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