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Network Configuration Examples
Table 1-2
Providing Network Services (continued)
Network Demands
An evolving demand for IP telephony
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
You can use the switches to create the following:
•
Figure 1-1
Catalyst 2960 Switch Software Configuration Guide
1-14
Suggested Design Methods
Use 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 IEEE 802.1p/Q. The switch
supports at least four queues per port.
•
Use voice VLAN IDs (VVIDs) to provide separate VLANs for voice traffic.
Use the Catalyst Long-Reach Ethernet (LRE) switches to provide up to 15 Mb of IP
connectivity over existing infrastructure, such as existing telephone lines.
LRE is the technology used in the Catalyst 2900 LRE XL and Catalyst 2950
Note
LRE switches. See the documentation sets specific to these switches for LRE
information.
Cost-effective Gigabit-to-the-desktop for high-performance workgroups
high-speed access to network resources, you can use the Cisco Catalyst 2960 switches in the access
layer to provide Gigabit Ethernet to the desktop. To prevent congestion, use QoS DSCP marking
priorities on these switches. For high-speed IP forwarding at the distribution layer, connect the
switches in the access layer to a Gigabit multilayer switch with routing capability, such as a
Catalyst 3750 switch, or to a router.
The first illustration is of an isolated high-performance workgroup, where the Catalyst 2960
switches are connected to Catalyst 3750 switches in the distribution layer. The second illustration is
of a high-performance workgroup in a branch office, where the Catalyst 2960 switches are
connected to a router in the distribution layer.
Each switch in this configuration provides users with a dedicated 1-Gb/s connection to network
resources. Using SFP modules also provides flexibility in media and distance options through
fiber-optic connections.
High-Performance Workgroup (Gigabit-to-the-Desktop)
Catalyst 3750
switches
Access-layer
Catalyst
switches
Chapter 1
Overview
(Figure
1-1)—For
OL-8603-04
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