Adding A Switch To A Stack; Best Practices - Dell Force10 S2410-01-10GE-24P Configuration Manual

Sftos configuration guide
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Adding a Switch to a Stack

Note: Dell Force10 currently supports a stack maximum of three units. S50 models can only
stack with other S50 models. The S25P, S50N, and S50V can be stacked together. See the
Quick Reference appropriate to your S-Series model or its installation guide for instructions on
making the physical stacking connections.
SFTOS provides three ways to add a switch to a stack:
Plug the unit into the stack and let the system configure it. The unit is automatically assigned the next
unused unit number.
Power the unit up as a standalone unit to assign a unit number and management unit preference before
connecting the unit to the stack. Use the
priority
command
Pre-configure the unit number (
connect the unit to the stack. If you are adding multiple units to an existing stack, you can either:
— Configure the unit numbers from the pre-configuration into the standalone units before
— Plug the units into the stack in the correct sequence to match the pre-configuration. After a

Best Practices

As best practices, to minimize disruption to the stack (and network) when connecting units and during
failures, you should:
1. Pre-configure unit numbers for each unit in the stack. Use the
2. Configure the switch priority for each unit to make management unit selection deterministic. Use the
switch priority
3. Make sure each unit has the same software version prior to connecting them together. If you do
connect them, the CLI will issue an error and not allow the stacking connection.
4. Make sure you save the configuration after making changes. The configuration will be saved to all
units in the stack. If you do not save changes, and a management unit were to fail, the changes would
be lost. Other units in the stack would not learn about the changes, or store them, unless they are saved.
5. Connect new units to an existing stack prior to powering them up. Failure to do so will not result in
physical damage, but a new unit that was previously configured as a management unit, that gets
connected to an existing stack, could end up as the manager, disrupting expected stack operation.
Use the
member
before physically adding it. In this case, we add the unit as #5:
(Figure 5-60 on page
member
connecting them.
Or
running configuration has been saved, all units are considered to be pre-configured.
command.
command to logically add a unit to a stack as a way to pre-configure it
unit switchindex
command
(Figure 5-57 on page
member
92).
command) through the stack's management unit and then
switch renumber
90) and
switch
command.
Stacking S-Series Switches | 89

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