Chapter 23 Configuring QoS

Monitoring QoS

•For traffic shaping, you can only use the class-defaultclass map, which is automatically created by the ASA, and which matches all traffic.

•You cannot configure traffic shaping and standard priority queuing for the same interface; only hierarchical priority queuing is allowed. See the “How QoS Features Interact” section on page 23-4for information about valid QoS configurations.

•You cannot configure traffic shaping in the global policy.

Detailed Steps

Step 1 Configure a service policy on the Configuration > Firewall > Service Policy Rules pane according to Chapter 1, “Configuring a Service Policy.”

You can configure QoS as part of a new service policy rule, or you can edit an existing service policy.

Step 2 In the Rule Actions dialog box, click the QoS tab.

Step 3 Click Enable traffic shaping, and configure the following fields:

•Average Rate—Sets the average rate of traffic in bits per second over a given fixed time period, between 64000 and 154400000. Specify a value that is a multiple of 8000.

•Burst Size—Sets the average burst size in bits that can be transmitted over a given fixed time period, between 2048 and 154400000. Specify a value that is a multiple of 128. If you do not specify the Burst Size, the default value is equivalent to 4-milliseconds of traffic at the specified Average Rate. For example, if the average rate is 1000000 bits per second, 4 ms worth = 1000000 * 4/1000 = 4000.

Step 4 (Optional) To configure priority queuing for a subset of shaped traffic:

a.Click Enforce priority to selected shape traffic.

b.Click Configure to identify the traffic that you want to prioritize.

You are prompted to identify the traffic for which you want to apply priority queuing.

c.After you identify the traffic (see the “Adding a Service Policy Rule for Through Traffic” section on page 1-8), click Next.

d.Click Enable priority for this flow.

e.Click Finish.

You return to the QoS tab.

Step 5 Click Finish. The service policy rule is added to the rule table.

Step 6 Click Apply to send the configuration to the device.

Monitoring QoS

To monitor QoS in ASDM, you can enter commands at the Command Line Interface tool. This section includes the following topics:

•Viewing QoS Police Statistics, page 23-12

•Viewing QoS Standard Priority Statistics, page 23-12

•Viewing QoS Shaping Statistics, page 23-13

Cisco ASA Series Firewall ASDM Configuration Guide

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Cisco Systems ASA Services Module, ASA 5505 manual Monitoring QoS, Click Enforce priority to selected shape traffic, 23-11
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ASA Services Module, ASA 5555-X, ASA 5545-X, ASA 5585-X, ASA 5580 specifications

Cisco Systems has long been a leader in the field of network security, and its Adaptive Security Appliance (ASA) series is a testament to this expertise. Within the ASA lineup, models such as the ASA 5505, ASA 5580, ASA 5585-X, ASA 5545-X, and ASA 5555-X stand out for their unique features, capabilities, and technological advancements.

The Cisco ASA 5505 is designed for small businesses or branch offices. It provides essential security features such as firewall protection, flexible VPN capabilities, and intrusion prevention. The ASA 5505 supports a user-friendly interface, allowing for straightforward management. Its built-in threat detection and prevention tools provide a layered defense, and with scalability in mind, it can accommodate various expansion options as organizational needs grow.

Moving up the line, the ASA 5580 delivers greater throughput and advanced security features. This model is suited for medium to large enterprises that require robust protection against increasingly sophisticated threats. Its multi-core architecture allows it to manage high volumes of traffic seamlessly while maintaining excellent performance levels. The ASA 5580 also supports application-layer security and customizable access policies, making it highly adaptable to diverse security environments.

The ASA 5585-X further enhances Cisco's security offerings with advanced malware protection and extensive security intelligence capabilities. It incorporates next-generation firewall features, including context-aware security, and supports advanced threat detection technologies. This model is ideal for large enterprises or data centers that prioritize security while ensuring uninterrupted network performance and availability.

For enterprises requiring a balance of performance and security, the ASA 5545-X presents a compelling option. This model features scalable performance metrics, high availability, and integrated advanced threat protection. Coupled with advanced endpoint protection and detailed monitoring capabilities, the ASA 5545-X enables organizations to manage their security posture effectively.

Lastly, the ASA 5555-X blends cutting-edge technologies with strong security infrastructures. It boasts high throughput and the ability to execute deep packet inspections. Its sophisticated architecture supports threat intelligence feeds that provide real-time security updates, making it a powerful tool against modern threats.

Each of these Cisco ASA models brings specific advantages to varied environments. Their integrative capabilities enable businesses to enhance their security postures while benefiting from seamless scalability and management. As cybersecurity threats evolve, these advanced appliances play a vital role in protecting valuable digital assets.
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