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Catalyst 2955 Hardware Installation Guide
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Chapter 4 Installation in a Hazardous Environment
Verifying Switch Operation
If POST completes successfully on the Catalyst 2955C-12 and 2955S-12:
• Uplink port 13 LED turns green.
• Uplink port 14 LED goes off during the flash file system initialization.
If POST completes successfully on the Catalyst 2955T-12:
• Uplink port 1 LED turns green.
• Uplink port 2 LED goes off during the flash file system initialization.
If POST fails on the Catalyst 2955C-12 and 2955S-12:
• Uplink port 13 LED blinks amber.
• Uplink port 14 LED turns green.
If POST fails on the Catalyst 2955T-12:
• Uplink port 1 LED blinks amber.
• Uplink port 2 LED turns green.
While the switch powers on, the power status LEDs are green or red, showing the
presence or absence of power supplies (see Table 2-1 on page 2-13 for details).
During POST, the power status LEDs are green. After POST completes
successfully, the power status LEDs are green if both power supplies are
functioning normally and the switch has been configured to operate in dual-power
mode.
If the switch is in single-power mode and only power supply A is present and
functioning, the LED for power supply B is green, and the LED for power supply
A shows its status. If the switch is in single-power mode and only power supply
B is present and functioning, the LED for power supply A is green, and the LED
for power supply B shows its status.
See the switch configuration guide for details on single- and dual-power mode
operation.
On a Catalyst 2950 switch, you can use the MODE button to recover the switch
password. The Catalyst 2955 switch has no MODE button, so the boot loader
compensates by using break key detection to stop the automatic boot sequence for
password recovery.
