The route processor for Catalyst 8540 CSR contains most of the system memory components and the main system processor, which includes the network management processor for the system software. The route processor maintains and executes the management functions that control the chassis. The Catalyst 8540 CSR chassis supports fault tolerance by allowing a secondary (or redundant) route processor to take over if the primary route processor fails. The redundant route processor runs in standby mode.The route processor features MultiChannel Interface Processor (MIP) architecture, and R5000 microprocessor at 200 MHz internally, and 100-MHz system interface. It includes three memory components. Two DRAM and SIMM modules provide storing incoming and outgoing packets, queues, and caches. One Flash memory SIMM provides storing the system software image. Using the Flash memory SIMM, you can load and store system software images remotely. You can download a new software image over the network or from a local server and add the new image to Flash memory or replace an existing image. Two Flash PC Card slots are intended for additional Flash memory. In addition to these features, the route processor performs interface and environmental status monitoring, and provides SNMP and the console (Telnet) interface. Also the route processor features air temperature sensor for environmental monitoring. The LEDs on the route processor indicate the status of the route processor, Flash PC Card slots, and interface ports.