Cisco ESR10008 Hardware Installation Guide - Page 22
Line Card and PRE Module Compartment, Performance Routing Engine
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Cisco 10008 Router Hardware Description Figure 1-5 AC PEM Chapter 1 Cisco 10008 Router Overview 30004 POWER FAULT Table 1-2 AC PEM LEDs LED Power (green) Fault (yellow) Description PEM is powered on and is operational. The PEM is not operating correctly (see the Cisco 10000 Series ESR Troubleshooting Guide). Line Card and PRE Module Compartment The module compartment has 10 slots: the two central slots are reserved for PRE modules, and the remaining 8 slots accommodate full-height line cards. The PRE and line cards support hot-swapping and redundancy. See Figure 1-1 for a front view of the module compartment, and Figure 1-2 for a rear view of the module compartment, BNC connectors, and line card subslot designations. For information about the line card that the Cisco 10008 router supports, see the Cisco 10000 Routers Line Card Hardware Installation Guide, and for line card configuration information, see the Cisco 10000 Series Router Line Card Configuration Guide. Performance Routing Engine The PRE is the central router and system controller (SC) for the Cisco 10008 router. It is responsible for all Layer 2 and Layer 3 packet processing, as well as execution of routing protocols and management of the system. The PRE consists of two main logical and physical cards: • Forwarding processor card-Performs high-speed IP forwarding • Route processor card-Manages process switching and several protocols The high performance forwarding engine in the PRE is Cisco's Parallel eXpress Forwarding (PXF) application specific integrated circuit (ASIC). The two PXF ASICs on the PRE direct traffic to and from the router line cards. Cisco 10008 Router Hardware Installation Guide 1-8 OL-0659-13
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