Alcatel OS6855-24 User Guide - Page 21

OmniSwitch OS6855 Family Availability Features Hardware Monitoring Automatic Monitoring Automatic monitoring refers to the switch's built-in sensors that automatically monitor operations. If an error is detected (e.g., over-threshold temperature), the switch immediately sends a trap to the user. The trap is displayed on the console in the form of a text error message. (In the case of an over-threshold temperature condition, the chassis displays an amber OK LED in addition to sending a trap.) LEDs LEDs, which provide visual status information, are provided on the chassis front panel. LEDs are used to indicate conditions such as hardware and software status, temperature errors, link integrity, data flow, etc. For detailed LED descriptions, refer to Chapter 2, "OmniSwitch 6855 Series Chassis and Hardware Components." User-Driven Monitoring User-driven hardware monitoring refers to CLI commands that are entered by the user in order to access the current status of hardware components. The user enters "show" commands that output information to the console. Monitoring information for chassis components, such as the optional back up power supply, chassis temperature sensor, and chassis fans is provided in Chapter 2, "OmniSwitch 6855 Series Chassis and Hardware Components." The show commands for all the features are described in detail in the OmniSwitch CLI Reference Guide. Backup Power Supplies OmniSwitch 6855 switches support an optional backup power supply. Backup power supplies operate in active standby mode. If the primary power supply fails unexpectedly, the backup power supply automatically takes up the full power load without disrupting the switch. The primary and backup power supplies for all OmniSwitch 6855 models are external. The power supplies for the smaller models come in the form of a power "brick." The Power over Ethernet (PoE) brick is separate from the main chassis power supply and is only required if the PoE capabilities of the switch are in use. Additional Power Supply Details For larger models, a power shelf is provided with the unit. It can slide into the rear of the chassis and is used to hold the primary and the backup power supplies. Any power supply can be remotely connected using a cable. With this configuration, the same power shelf can be mounted in the rack using a mounting bracket (provided with the unit). This allows the OmniSwitch 6855 to be used in reduced depth areas such as wall-mounted cabinets, etc. Note. For more information on power supplies, refer to Chapter 2, "OmniSwitch 6855 Series Chassis and Hardware Components." OmniSwitch 6855 Series Hardware Users Guide September 2011 page 1-5