Cisco Systems UBR7225VXR specifications Hardware Component Descriptions, Network Processing Engine

Chapter 1 Cisco uBR7225VXR Overview

Hardware Component Descriptions

Figure 1-7 Telco Return Network Example

IP network access

RADIUS dial	Cisco network
	access server
security server

PPPconnection between remote cable modem

and network access server

established following

authentication

PSTN

IP network

		Upstream
	Headend or hub
DHCP	Cisco
	uBR7225VXR
TFTP
TOD	HFC downstream
servers		Subscriber
	including TCD messages		271653
		cable modem

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 “Online Insertion and Removal” 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:

•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 1-17

•Subchassis and Midplane, page 1-17

•CompactFlash Disk, page 1-18

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	OL-17309-02