Alcatel OS6400-48 Hardware User Guide - Page 108

Secondary Management Module Selection Using Saved Slot Information, Reminder., Reload

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Roles Within the Stack Managing OmniSwitch 6400 Series Stacks 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 6-7). For more information on using saved slot information to determine the secondary management module in a stack, refer to the diagram below: Saved Slot 1 Saved Slot 3 Saved Slot 4 Saved Slot 2 1 Four OmniSwitch 6400 Series switches are stacked; all switches are connected via stacking cables. The user configures each switch to have a unique saved slot number, as shown. When the saved slot number is configured, the information is automatically written to the boot.slot.cfg file located in the /flash directory of each switch. Reload 2 The user reloads all the elements in the stack either by issuing the reload all command or by physically powering off and then powering on all switches. Assumes Slot 1 Assumes Slot 3 Assumes Slot 4 Assumes Slot 2 3 The system software reads the slot information from each switch's boot.slot.cfg file during the boot process. The switches in the stack come up using their assigned slot numbers. Primary - Slot 1 Slot 3 Slot 4 Secondary - Slot 2 4 The switch with the lowest assigned slot number automatically assumes the primary management role. The switch with the second lowest assigned slot number becomes the secondary management role, regardless of whether it is attached to stacking port A of the primary switch. In this case, the switch assigned slot 2 has the second-lowest slot number in the stack and becomes the secondary management module. Secondary Management Module Selection Using Saved Slot Information Reminder. 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 6-12. page 6-10 OmniSwitch 6400 Series Hardware Users Guide July 2010

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Roles Within the Stack
Managing OmniSwitch 6400 Series Stacks
page 6-10
OmniSwitch 6400 Series Hardware Users Guide
July 2010
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 6-7
).
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
Reminder.
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 6-12
.
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 6400 Series switches are stacked; all switches
are connected via stacking cables. The user configures each
switch to have a unique saved slot number, as shown. When the
saved slot number is configured, the information is automatically
written to the
boot.slot.cfg
file located in the /flash directory of
each switch.
The user reloads all the elements in the stack either by issuing
the
reload all
command or by physically powering 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 process. The switches
in the stack come up using their assigned slot numbers.
The switch with the lowest assigned slot number automatically
assumes the primary management role. The switch with the
second lowest
assigned slot number becomes the secondary
management role, regardless of whether it is attached to stacking
port A of the primary switch. In this case, the switch assigned
slot 2 has the second-lowest slot number in the stack and becomes
the secondary management module.
1
2
3
4
Saved Slot 3
Saved Slot 4
Saved Slot 2
Reload