Enterasys A4H124-24, Hardware Installation Manual

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Connecting AC Power
Enterasys A4 Fast Ethernet Switch Hardware Installation Guide 2-9
Adding a New Switch to an Existing Stack
Use the following procedure to install a new switch to an existing stack configuration.
1. Ensure that power is off on the new switch being installed.
2. Use one of the following methods to complete the stack cable connections:
– If the running stack uses a daisy chain topology, make the stack cable connections from
the bottom of the stack to the new switch (that is, STACK DOWN connector from the
bottom switch of the running stack to the STACK UP connector on the new switch).
– If the running stack uses a ring stack topology, break the ring and make the stack cable
connections to the new switch to close the ring.
3. Apply power to the new switch.
Connecting AC Power
To connect a switch to the AC power source, refer to Figure 1-3 on page 1-3 and proceed as
follows:
1. Plug the power cord into the switch AC power connector.
2. Plug the other end of the power cord into a dedicated grounded AC outlet (not shown). The
type of power outlet and power cord are country-dependent.
3. Observe the power CPU LED (not shown), located on the front panel. During the
initialization, the CPU LED will start by illuminating solid amber, then start blinking green,
then blinking amber, then blinking green again until the end of the initialization, and then
turns solid green.
Note: This procedure assumes that the new switch being added has a clean configuration from
manufacturing and is running the same firmware image version as other switches in the stack.
Important Considerations About Using Clear Config in a Stack
When using the clear config command (as described in the Enterasys A4 CLI Reference Guide ) to clear
configuration parameters in a stack, it is important to remember the following:
• Use clear config to clear config parameters without clearing stack switch IDs. This command WILL NOT
clear stack parameters and avoids the process of re-numbering the stack.
• Use clear config all when it is necessary to clear all config parameters, including stack switch IDs and
switch priority values.
Note: The power supply in the switch has automatic voltage sensing that allows connection to
power sources ranging from 100 to 240 VAC.
Note: If you plan to connect all the switches quickly to allow automatic Manager selection, wait until
all switches are fully operational before proceeding to the next step.
If you plan to power up each switch and allow it to become fully operational before applying power
to the next switch, proceed to the next step.
Note: If the CPU LED illuminates solid red, there was a critical failure. For more information about
the LED indications and troubleshooting, refer to Chapter 3 , Troubleshooting . If you need
additional help, contact Enterasys Networks. Refer to “ Getting Help ” on page xvii for details
.