Hardware Component Descriptions; Network Processing Engine - Cisco UBR7225VXR Hardware Installation Manual

Hardware Component Descriptions

Figure 1-7
IP network
Hardware Component Descriptions
Most Cisco uBR7225VXR universal broadband router components are field-replaceable units (FRUs).
These units, unless otherwise noted, are OIR compatible. See the
section on page 5-1
FRU documentation (instructions on installing, removing, and replacing) is located at the following
URL:
http://www.cisco.com/en/US/products/hw/routers/ps341/prod_installation_guides_list.html
The following components are described:
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•
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Network Processing Engine

The network processing engine (NPE) maintains and executes the system management functions for the
Cisco uBR7225VXR router. The network processing engine performs the following system management
functions:
Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide
1-10
Telco Return Network Example
RADIUS dial
security server
Headend or hub
DHCP
TFTP
TOD
servers
Network Processing Engine, page 1-10
Cisco Cable Interface Line Cards, page 1-12
Power Supplies, page 1-13
Fan Trays, page 1-14
Cisco uBR7225VXR Chassis, page 1-16
Subchassis and Midplane, page 1-16
CompactFlash Disk, page 1-17
IP network access
Cisco network
access server
Cisco
uBR7225VXR
Chapter 1 Cisco uBR7225VXR Overview
PPP connection between
remote cable modem
and network access server
established following
authentication
Upstream
HFC downstream
including TCD messages
"Online Insertion and Removal"
PSTN
Subscriber
cable modem
OL-17309-01