Queuing policies help network managers provide users with a high level of service across a
WAN link, as well as control WAN costs. Typically, the corporate goal is to deploy and maintain
a single enterprise network, even though the network supports disparate applications,
organizations, technologies, and user expectations. Consequently, network managers are
concerned about providing all users with an appropriate level of service while continuing to
support mission-critical applications and having the ability to integrate new technologies at
the same time.
Figure 30.1 shows a serial interface that is congested and needs queuing implemented.
It’s important to remember that you need to implement queuing only on interfaces that
experience congestion.
The network administrator should understand the delicate balance between meeting the
business requirements of users and controlling WAN costs. Queuing enables network administrators
to effectively manage network resources.
FIGURE 3 0 . 1
Queuing policy
S0
Bottleneck
Traffic queue
IPX
IP
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