Cisco WS-C3560-48PS-S Software Configuration Manual page 50

Network Configuration Examples
Table 1-2 Increasing Network Performance
Network Demands
Too many users on a single network
segment and a growing number of
users accessing the Internet
Increased power of new PCs,
•
workstations, and servers
• High bandwidth demand from
networked applications (such as
e-mail with large attached files)
and from bandwidth-intensive
applications (such as
multimedia)
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 1-3 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
Catalyst 3560 Switch Software Configuration Guide
1-12
Suggested Design Methods
Create smaller network segments so that fewer users share the bandwidth, and use
•
VLANs and IP subnets to place the network resources in the same logical network
as the users who access those resources most.
• Use full-duplex operation between the switch and its connected workstations.
Connect global resources—such as servers and routers to which the network users
•
require equal access—directly to the high-speed switch ports so that they have
their own high-speed segment.
• Use the EtherChannel feature between the switch and its connected servers and
routers.
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 optional IP multicast routing to design networks better suited for multicast
•
traffic.
Use MVR to continuously send multicast streams in a multicast VLAN but to
•
isolate the streams from subscriber VLANs for bandwidth and security reasons.
Use Hot Standby Router Protocol (HSRP) for cluster command switch and router
•
redundancy.
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.
Chapter 1 Overview
Table 1-3 describes some
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