Cisco 10008 - Manual (Page 4)

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Cisco 10008 Router Performance Routing Engine 3 Installation
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Product Overview
The PRE3 runs Cisco IOS Release 12.2(31)SB2 and later releases. Benefits of the PRE3 include:
• 800-MHz dual processor
• Four PXF network processors arranged as 8 columns and 8 rows
• 128 Mbytes of configuration memory (per column) with Error-Correcting Code (ECC)
• 2 GB SDRAM with single error correction/double error detect ECC
• Two separate CompactFlash slots. The internal CompactFlash slot stores images to bootflash. The
external CompactFlash slot is Disk0.
• 256 MB packet buffer and 64 MB control memory ECC
• A 1000/100 Mbit Interprocess Ethernet interface for communications between redundant PRE3s
• A Hierarchical Queueing Framework (HQF) that provides a three level hierarchy for class, logic,
and physical levels
By centralizing packet processing in the PRE3, the Cisco 10008 router architecture frees up space on
line cards, enabling high interface density, yet retaining the compact Network Equipment Business
Systems (NEBS) transmission equipment form factor.
Redundant PRE3s
You can configure two PRE3s in a single chassis for redundancy. If the active PRE3 fails, the standby
PRE3 automatically takes over operation of the router. Because all the line cards are physically
connected to both the active and standby PRE3s, the failure of a single PRE3 does not require user
intervention. If a failure occurs, all line cards automatically reset to the redundant PRE3. Startup and
running configurations of the standby PRE3 are synchronized with the active PRE3, ensuring the fastest
possible cut-over time if the active PRE3 fails.
PRE3 Front Panel
This section describes the PRE3 front panel (see Figure 2 ).
PRE3 Connectors
The front panel on the PRE3 contains three ports with RJ-45 connectors (see Figure 2 ).
• Console port (CONSOLE)—This asynchronous serial port is used to connect a terminal to the PRE3
for local administrative access.
• Auxiliary port (AUX)—This asynchronous serial port is used to connect a modem to the PRE3 for
remote administrative access.
• Network Management Ethernet (NME) Port (ETHERNET)—This Ethernet port is used to connect
the PRE3 to a Fast Ethernet port.
CompactFlash Card Slot
The internal CompactFlash card slot can store the Cisco IOS image or a system configuration file on a
flash memory card. The system can also boot from the software stored on the flash memory card.