Cisco 10008 Installation And Configuration Manual page 4

Product Overview
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By centralizing packet processing in the PRE4, 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 PRE4
You can configure two PRE4 in a single chassis for redundancy. If the active PRE4 fails, the standby
PRE4 automatically takes over operation of the router. Because all the line cards are physically
connected to both the active and standby PRE4, the failure of a single PRE4 does not require user
intervention.
If a failure occurs, all line cards automatically reset to the redundant PRE4. Startup and running
configurations of the standby PRE4 are synchronized with the active PRE4, ensuring the fastest possible
cut-over time if the active PRE4 fails.
PRE4 Front Panel
This section describes the PRE4 front panel shown in
Figure 2
Cisco 10008 Router PRE4 Installation and Configuration Guide
4
800-MHz dual processor
Sixty-four PXF network processors arranged as 8 columns and 8 rows
512 MB packet buffer and 128 MB control memory with error-correcting code (ECC)
4 GB ECC-protected route processor (RP) memory
10 million packets per second (Mpps) forwarding performance through the PXF complex
5.6 Gbps backplane bandwidth for each full-height backplane slot
11.2 Gbps backplane bandwidth to each SPA interface processor (SIP)
Maximum transmission unit (MTU) support of 9216 bytes
An external CompactFlash slot (Disk0)
A 100/1000 Mbit Ethernet interface for communication between two redundant PRE4.
Full backward compatibility with all existing line cards supported on the Cisco 10008 router
Hierarchical Queueing Framework (HQF) that provides up to three levels of service granularity
PRE4 Front Panel
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Figure
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2.
PERFORMANCE ROUTING ENGINE
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ESR-PRE4
P/N
OL-13840-01