Information Technology Reference
In-Depth Information
Enterprise Branch Module
The enterprise branch normally consists of remote offices or sales offices. These branch
offices rely on the WAN to use the services and applications provided in the main cam-
pus. Infrastructure at the remote site usually consists of a WAN router and a small LAN
switch, as shown in Figure 2-13. As an alternative to MPLS, it is common to use site-to-
site IPsec VPN technologies to connect to the main campus.
Enterprise Branch
WAN to Main
Enterprise
Headquarters
Figure 2-13
Enterprise Branch Module
Enterprise Data Center Module
The enterprise data center uses the network to enhance the server, storage, and application
servers. the offsite data center provides disaster recovery and business continuance serv-
ices for the enterprise. Highly available WAN services are used to connect the enterprise
campus to the remote enterprise data center. The data center components include
Network infrastructure:
Gigabit and 10 Gigabit Ethernet, InfiniBand, optical trans-
port and storage switching
■
Interactive services:
Computer infrastructure services, storage services, security,
application optimization
■
DC management:
Cisco Fabric Manager and Cisco VFrame for server and service
management
■
The enterprise data center is covered in detail in Chapter 4, “Data Center Design.”
Enterprise Teleworker Module
The enterprise teleworker module consists of a small office or a mobile user who needs to
access services of the enterprise campus. As shown in Figure 2-14, mobile users connect
from their homes, hotels, or other locations using dialup or Internet access lines. VPN
