Dell PowerConnect FCS624S Configuration Guide - Page 655

ACL-based rate limiting using traffic policies 18 • By default, up to 1024 active traffic policies are supported on Layer 2 switches. This value is fixed on Layer 2 switches and cannot be modified. • On PowerConnect B-Series FCX devices, up to 1024 active traffic policies are supported on Layer 3 switches. This is the default value as well as the maximum value. Setting the maximum number of traffic policies supported on a Layer 3 device NOTE This configuration is supported on Dell PowerConnect devices with the exception of the PowerConnect B-Series FCX platforms. Setting the system-max for traffic policies is not required on PowerConnect B-Series FCX platforms as the default number of traffic policies is also the maximum number. If desired, you can adjust the maximum number of active traffic policies that a Layer 3 device will support. To do so, enter commands such as the following at the global CONFIG level of the CLI. PowerConnect(config)#system-max hw-traffic-conditioner 25 PowerConnect(config)#write memory PowerConnect(config)#reload NOTE You must save the configuration and reload the software to place the change into effect. Syntax: [no] system-max hw-traffic-conditioner The variable is a value from 0 through n, where 0 disables hardware resources for traffic policies, and n is a number up to 50. The maximum number you can configure depends on the configuration and available memory on your device. If the configuration you enter causes the device to exceed the available memory, the device will reject the configuration and display a warning message on the console. NOTE Dell does not recommend setting the system maximum for traffic policies to 0 (zero), because this renders traffic policies ineffective. ACL-based rate limiting using traffic policies ACL-based rate limiting provides the facility to limit the rate for IP traffic that matches the permit conditions in extended IP ACLs. This feature is available in the Layer 2 and Layer 3 code. To configure ACL-based rate limiting, you create individual traffic policies, and then reference the traffic policies in one or more ACL entries (also called clauses or statements). The traffic policies become effective on ports to which the ACLs are bound. When you configure a traffic policy for rate limiting, the device automatically enables rate limit counting, similar to the two-rate three-color marker (trTCM) mechanism described in RFC 2698 for adaptive rate limiting, and the single-rate three-color marker (srTCM) mechanism described in RFC 2697 for fixed rate limiting. This feature counts the number of bytes and trTCM or srTCM conformance level per packet to which rate limiting traffic policies are applied. Refer to "ACL statistics and rate limit counting" on page 619. PowerConnect B-Series FCX Configuration Guide 613 53-1002266-01