Cisco Systems Cisco 12008 manual Overview of the Cisco

Overview of the Cisco 12008

Separately orderable documents called configuration notes or replacement instructions are available for each of the FRUs described previously. These documents provide installation, removal, replacement, and configuration instructions for the FRUs.

•Environmental monitoring system—The maintenance bus (MBus) facility of the Cisco 12008 functions as an environmental monitoring system for the router, enabling the router to monitor itself and alert site personnel to adverse electrical events or environmental conditions.

MBus software running in the RP, in combination with LEDs on the CSC faceplate, keep site personnel informed regarding the operational state of the router.

By signaling alarm conditions, such as component overheating or out-of-tolerance voltages, the router enables you to resolve adverse environmental conditions before operational limits are exceeded, thus preventing the router from shutting down.

The MBus facility of the router is described in greater detail in the section entitled “Cisco 12008 Environmental Monitoring Facility” on page 74.

•Downloadable software—This feature allows you to remotely load new operational software into Flash memory on the RP without physically accessing the router. Thus, you can quickly, easily, and reliably perform software upgrades at any time.

Overview of the Cisco 12008

The Cisco 12008 is a modular system consisting of the elements shown in Figure 1-2.

The following sections describe the major elements of the Cisco 12008 in greater detail.

1-6Cisco 12008 Gigabit Switch Router Installation and Configuration Guide