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Cisco CGS 2520 Hardware Installation Guide
OL-31444-01
Chapter 1 Product Overview
SD Flash Memory Card

Dual-Purpose Port LEDs

The dual-purpose port LEDs identify the connection as either a copper-based connector or an SFP
module. The ports can autonegotiate, or you can manually configure each dual-purpose port as either
10/100/1000 with copper connectors or as an SFP module port, but not as both types at the same time.
See Table 1-8 for LED descriptions.

SD Flash Memory Card LED

SD Flash Memory Card
The switch ships with the Secure Digital (SD) flash memory card installed. See Figure 1-1 and
Figure 1-2. You can remove the card from a failed switch and install it in a replacement switch. You do
not have to reconfigure the new switch. See the “Replacing the SD Flash Memory Card” section on
page 2-22 for information.
Warning
Be aware that the SD card contains sensitive and security relevant information, including but not
limited to full device configuration information, public and private keys used for SSH and SSL (if those
protocols are enabled), device passwords and others. Access to SD cards for any Cisco CGS switch
should be limited to authorized personnel.
Power Supply Side
The power supply side has the LED panel and two power supply slots for the removable power supplies.
See Figure 1-7 and Figure 1-8.
This section has information about:
• Power Supply-Side LEDs, page 1-14
• Power Supply Features, page 1-14
Table 1-10 SD Fl ash Me mory C ard LED
Color System Status
Off / blinking green Transfer in progress
Blinking amber Not present (slow blinking); unsupported SD flash memory card is
detected (fast blinking)
Amber Error accessing the SD flash memory card; Cisco IOS boot image
cannot be found
Green SD flash memory card is functioning