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User Guide for Cisco Security Manager 4.4
OL-28826-01
Chapter 63 Configuring Quality of Service
Quality of Service on Cisco IOS Routers
Step 6 Continue as described in Defining QoS Policies, page 63-10.
Defining QoS Class Queuing Parameters
When you define queuing parameters, you can specify the amount of available bandwidth to provide to
the traffic in this QoS class. You can also define a fixed amount of bandwidth that must be provided to
high-priority traffic; you can define the priority parameter on only one class per interface. In addition,
you must specify the type of queue management to perform on this class. See Understanding Queuing
Parameters, page 63-4 for more information.
Note Queuing is not available when you configure QoS on the control plane.
Related Topics
• Defining QoS Class Matching Parameters, page 63-13
• Defining QoS Class Marking Parameters, page 63-15
• Defining QoS Class Policing Parameters, page 63-17
• Defining QoS Class Shaping Parameters, page 63-18
• Defining QoS Policies, page 63-10
• Quality of Service on Cisco IOS Routers, page 63-1
Step 1 On the Quality of Service page, click the Add button beneath the QoS Classes table, or select a class and
then click the Edit button. The QoS Class dialog box is displayed.
Step 2 Click the Queuing and Congestion Avoidance tab. See Table 63-8 on page 63-27 for a description of
the fields on this tab.
Step 3 Click the Enable Queuing and Congestion Avoidance check box.
Queuing options depend on whether you are defining the default class or a different class:
• When you define any class other than the default class, select one of the following queuing options:
–
Priority—Define the amount of bandwidth to make available to high-priority traffic.
Low-Latency Queuing, page 63-5 (LLQ) ensures that this traffic receives this fixed amount of
bandwidth at all times. This is particularly useful for voice traffic, which requires low latency.
You can define this amount by percentage or by an absolute value of kilobits per second.
Note You can define this option for only one class per interface.
–
Bandwidth—Enter the amount of bandwidth to allocate to this class. You can define this amount
by percentage or by an absolute value of kilobits per second.
Note The sum of all class bandwidth allocations on an interface cannot exceed 100 percent of
the total available bandwidth.
• When you define the default class, select one of the following queuing options: