Managing OmniSwitch 6450 Stacks Roles Within the Stack
OmniSwitch 6450 Hardware Users Guide July 2012 page 6-11
Using Saved Slot Information
If a stack with preassigned slot information for each switch is booted, the switch with the second lowest
slot value is assigned the secondary management role. For example, if a stack of four switches is booted
and the preassigned slot values for each switch are 1, 2, 3, and 4, the switch with the slot value of 2 is
assigned the secondary role. Meanwhile, the switch with the slot value of 1 is assigned the primary
management role (see page 6-8).
For more information on using saved slot information to determine the secondary management module in
a stack, refer to the diagram below:
Secondary Management Module Selection Using Saved Slot Information
Note. Each element in a stack should always be assigned a unique slot number. Do not assign
duplicate slot numbers to elements in a stack. Otherwise, one or more switches will be forced into
pass-through mode. For more information on pass-through mode, refer to page 6-13.
Primary - Slot 1
Slot 3
Slot 4
Secondary - Slot 2
Assumes Slot 1
Assumes Slot 3
Assumes Slot 4
Assumes Slot 2
Saved Slot 1
Four OmniSwitch 6450 switches are stacked; all
switches are connected via stacking cables. The user
configures each switch to have a unique saved slot num-
ber, as shown. When the saved slot number is config-
ured, the information is automatically written to the
The user reloads all the elements in the stack either by
issuing the reload all command or by physically pow-
ering off and then powering on all switches.
The system software reads the slot information from
each switch’s boot.slot.cfg file during the boot pro-
The switch with the lowest assigned slot number auto-
matically assumes the primary management role. The
switch with the
second lowest assigned slot number becomes the sec-
ondary
management role, regardless of whether it is attached
1
2
3
4
Saved Slot 3
Saved Slot 4
Saved Slot 2
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