Before you install the switch
in a rack, on a wall, or on a table or shelf, power on the switch and verify
that it passes POST.
To power on the switch, do
one of the following, depending on your switch model:
10/100/1000 uplink port to a PoE or PoE+ switch.
auxiliary power adapter cord into the switch AUX power connector and into an AC
You can use
both the uplink port and the auxiliary power adapter. The switch shares power
from all the available power sources. The total available power to the switch
is the sum of power available from all the power sources minus the power that
Plug one end of the AC power cord into the switch AC power
connector, and plug the other end into an AC power outlet.
If you have a Catalyst WS-C3560CX-8PT-S switch that is connected to
a Power Source Equipment (PSE) PoE or PoE+ port with ether-channel
configuration, do not power on the switch by connecting only one 10/100/1000
uplink port to the PSE. Doing so will cause the PSE to detect a port channel
misconfiguration when the switch tries to boot in low power mode, and hence the
port will go into error disabled mode.
For Catalyst WS-C3560CX-8PT-S switches, you must connect both uplink
ports to the PSE. Alternatively, use the auxiliary power supply.
For more details on Low Power Bootup, see the
PoE and PoE Pass-Through Ports on Catalyst WS-C3560CX-8PT-S
section in the
Configuring PoE chapter of the switch's Software Configuration
Guide on Cisco.com.
As the switch powers on, it
begins the POST, a series of tests that runs automatically to ensure that the
switch functions properly. LEDs can blink during the test. POST lasts
approximately 1 minute. When the switch begins POST, the SYST, STAT, and SPEED
LEDs turn green. The SYST LED blinks green, and the other LEDs remain solid
When the switch completes
POST successfully, the SYST LED remains green. The other LEDs turn off and then
reflect the switch operating status. If a switch fails POST, the SYST LED turns
POST failures are usually
fatal. Call Cisco technical support representative if your switch fails POST.
After a successful POST,
unplug the power cord from the switch and install the switch in a rack, on a
wall, on a table, or on a shelf.