Cisco 813-RF - 813 Router Especificaciones descargar pdf (Pagina 4)

CHAPTER 1

Campus Network Design

Chapter 1

Campus Network Design

An enterprise campus generally refers to a network in a specific geographic location. It can be within one building or

span multiple buildings near each other. A campus network also includes the Ethernet LAN portions of a network outside

the data center. Large enterprises have multiple campuses connected by a WAN. Using models to describe the network

architecture divides the campus into several internetworking functional areas, thus simplifying design, implementation,

and troubleshooting.

The Hierarchical Design Model

Cisco has used the three-level Hierarchical Design Model for years. The hierarchical design model divides a network into

three layers:

n Access: Provides end-user access to the network. In the LAN, local devices such as phones and computers access

the local network. In the WAN, remote users or sites access the corporate network.

n High availability via hardware such as redundant power supplies and redundant supervisor engines. Software

redundancy via access to redundant default gateways using a first hop redundancy protocol (FHRP).

n Converged network support by providing access to IP phones, computers, and wireless access points. Provides

QoS and multicast support.

n Security through switching tools such as Dynamic ARP Inspection, DHCP snooping, BPDU Guard, port-security,

and IP source guard. Controls network access.

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CCNP SWITCH 642-813 Quick Reference by Denise Donohue

9781587140112.qxd 11/23/09 11:34 AM Page 4

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Cisco 813-RF - 813 Router Especificaciones Pagina 4