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Catalyst 2940 Switch Software Configuration Guide
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Chapter 1 Overview
Network Configuration Examples
Small Network Configuration
Figure 1-1 shows a configuration for a network that has up to 25 users. Users in this network require
e-mail, file-sharing, database, and Internet access.
Note An external power supply is required for the Cisco Aironet access point.
Figure 1-1 Small to Medium-Sized Network Configuration
You optimize network performance by placing workstations on the same logical segment (VLAN) as the
servers they access most often. This in turn reduces access point processing and improves performance
and throughput.
Workstations are connected directly to the 10/100 switch ports for their own 10- or 100-Mbps access to
network resources (such as web and mail servers). When a workstation is configured for full-duplex
operation, it receives up to 200 Mbps of dedicated bandwidth from the switch. The Cisco Aironet
Table 1-2 Providing Network Services
Network Demands Suggested Design Methods
High demand for multimedia support
• Use IGMP and MVR to efficiently forward multicast traffic.
High demand for protecting mission-critical
applications
• Use VLANs and protected ports to provide security and port isolation.
• Use VLAN trunks, cross-stack UplinkFast, and BackboneFast for
traffic-load balancing on the uplink ports so that the uplink port with a
lower relative port cost is selected to carry the VLAN traffic.
An evolving demand for IP telephony
• Use quality of service (QoS) to prioritize applications such as IP
telephony during congestion and to help control both delay and jitter
within the network.
• Use switches that support at least two queues per port to prioritize voice
and data traffic as either high- or low-priority, based on 802.1P/Q.
A growing demand for using existing
infrastructure to transport data and voice from
a home or office to the Internet or an intranet at
higher speeds.
• Use the Catalyst 2900 LRE XL or Catalyst 2950 LRE switches to
provide up to 15 Mb of IP connectivity over existing infrastructure
(existing telephone lines).
Single workstations
Server
Cisco 1700
87789
Aironet
AccessPoint
Catalyst 2940