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Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter 58 Configuring QoS
Configuring QoS
Guidelines
• For priority traffic, identify only latency-sensitive traffic.
• For policing traffic, you can choose to police all other traffic, or you can limit the traffic to certain
types.
Detailed Steps
Step 1 To configure policing, configure a service policy rule in the Configuration > Firewall > Service Policy
Rules pane according to Chapter 36, “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 policing, then check the Input policing or Output policing (or both) check boxes to
enable the specified type of traffic policing. For each type of traffic policing, configure the following
fields:
• Committed Rate—The rate limit for this traffic flow; this is a value in the range 8000-2000000000,
specifying the maximum speed (bits per second) allowed.
• Conform Action—The action to take when the rate is less than the conform-burst value. Values are
transmit or drop.
• Exceed Action—Take this action when the rate is between the conform-rate value and the
conform-burst value. Values are transmit or drop.
• Burst Rate—A value in the range 1000-512000000, specifying the maximum number of
instantaneous bytes allowed in a sustained burst before throttling to the conforming rate value.
Step 4 Click Finish. The service policy rule is added to the rule table.
Step 5 To configure priority queuing, configure a service policy rule for the same interface in the Configuration
> Firewall > Service Policy Rules pane according to Chapter 36, “Configuring a Service Policy.”
For policing traffic, you can choose to police all traffic that you are not prioritizing, or you can limit the
traffic to certain types.
Step 6 In the Rule Actions dialog box, click the QoS tab.
Step 7 Click Enable priority for this flow.
If this service policy rule is for an individual interface, ASDM automatically creates the priority queue
for the interface (Configuration > Device Management > Advanced > Priority Queue; for more
information, see the “Configuring the Standard Priority Queue for an Interface” section on page 58-7).
If this rule is for the global policy, then you need to manually add the priority queue to one or more
interfaces before you configure the service policy rule.
Step 8 Click Finish. The service policy rule is added to the rule table.
Step 9 Click Apply to send the configuration to the device.