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DC Power
To add DC power, connect the power cord plug to each DC power connector. Make sure that the power
cord is secure (shown in the following illustration).
As soon as the cable is connected between the S4810–ON and the power source, the system is
powered-up; there is no on/off switch.
Hot-Swap Units in a Stack
You can add, remove, or swap S4810–ON units in an existing stack. The units in the stack and the new
units can be already powered up or powered down.
All units in a stack must run the same version of the operating system. If you attempt to attach a unit with
a different version of the operating system to an existing stack, the CLI displays an error and the unit is
not added until you install compatible software.
The order in which the units come online or are added to or removed from the stack affects how the
stack identifies them and how the units identify themselves. This influences unit numbers, management
addresses, and other elements of the configuration file.
Unit identification within the stack is determined by the identification algorithm you select. The default
algorithm has the units self-identify as Unit 0 through Unit last based on the order in which they come
online. So, when setting up a new set of switches in a stack, you can force the identification of the
management unit and unit IDs by methodically supplying power to the units in your preferred sequence.
Similarly, when you add a unit to the stack, the unit is gracefully added as Unit last (the lowest unused
number) with the current configuration. Attaching a new unit may cause each unit in the stack to reload.
The subsequent configuration file in each unit includes the awareness of the new unit.
If you have a pre-configured unit that you want to add to the stack, but you want to make sure that the
configuration does not override the configuration of the stack, add the unit while it is powered down to
avoid stack management conflicts.
24
Install the S4810–ON
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