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Cisco EtherSwitch Service Modules Feature Guide
Network Configuration Examples
82
Cisco IOS Release 12.2(25)SEC
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. Table 6 describes some
network demands and how you can meet them.
Table 5 Increasing Network Performance
Network Demands Suggested Design Methods
Too many users on a single network
segment and a growing number of
users accessing the Internet
• 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 internal interface and its connected
workstations.
• 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)
• Connect global resources—such as servers and routers to which the network users
require equal access—directly to the high-speed internal interface ports so that
they have their own high-speed segment.
• Use the EtherChannel feature between the internal interface and its connected
servers and routers.
Table 6 Providing Network Services
Network Demands Suggested Design Methods
Efficient bandwidth usage for
multimedia applications and
guaranteed bandwidth for critical
applications
• 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 Multicast VLAN Registration (MVR) to continuously send multicast streams
in a multicast VLAN but to isolate the streams from subscriber VLANs for
bandwidth and security reasons.