Cisco Catalyst 2928 Software Configuration Manual page 44

Network Configuration Examples
Bandwidth alone is not the only consideration when designing your network. As your network traffic
profiles evolve, consider providing network services that can support applications for voice and data
integration, multimedia integration, application prioritization, and security.
network demands and how you can meet them.
Table 1-2 Providing Network Services
Network Demands
Efficient bandwidth usage for
multimedia applications and
guaranteed bandwidth for critical
applications
High demand on network redundancy
and availability to provide always on
mission-critical applications
An evolving demand for IP telephony
You can use the switches to create the following:
•
Catalyst 2928 Switch Software Configuration Guide
1-12
Suggested Design Methods
Use IGMP snooping to efficiently forward multimedia and multicast traffic.
•
Use other QoS mechanisms such as packet classification, marking, scheduling,
•
and congestion avoidance to classify traffic with the appropriate priority level,
thereby providing maximum flexibility and support for mission-critical, unicast,
and multicast and multimedia applications.
Use VLAN trunks 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.
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.
•
Cost-effective Gigabit-to-the-desktop for high-performance workgroups
high-speed access to network resources, you can use the Cisco Catalyst 2928 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 2928
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 2928 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.
Chapter 1 Overview
Table 1-2 describes some
(Figure 1-1)—For
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