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Cisco 10008 Router Hardware Installation Guide
OL-0659-13
Chapter 1 Cisco 10008 Router Overview
Cisco 10008 Router Hardware Description
Figure 1-5 AC PEM
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.
Table 1-2 AC PEM LEDs
LED Description
Power (green) PEM is powered on and is operational.
Fault (yellow) The PEM is not operating correctly (see the Cisco 10000
Series ESR Troubleshooting Guide).
30004
POWER
FAULT