Dell Force10 Z9000 FTOS Command Line Reference Guide for the Z9000 System FTOS - Page 1181

39 Quality of Service (QoS) The Dell Force10 operating software (FTOS) commands for quality of service (QoS) include traffic conditioning and congestion control. QoS commands are supported on the C-Series, E-Series, S-Series, Z-Series, and S4810 Dell Force10 platforms. This chapter contains the following sections: • Global Configuration Commands • Per-Port QoS Commands • Policy-Based QoS Commands Global Configuration Commands There is only one global configuration QoS command. qos-rate-adjust By default, while rate limiting, policing, and shaping, FTOS does not include the Preamble, SFD, or the IFG fields. These fields are overhead; only the fields from MAC destination address to the CRC are used for forwarding and are included in these rate metering calculations. You can optionally include overhead fields in rate metering calculations by enabling QoS Rate Adjustment. C-Series, E-Series, S-Series, Z-Series, S4810 Syntax Parameters qos-rate-adjustment overhead-bytes overhead-bytes Include a specified number of bytes of packet overhead to include in rate limiting, policing, and shaping calculations. For the C-Series and S-Series, the range is 1 to 31. For the E-Series, the range is 1 to 144. Defaults Command Modes Command History QoS rate adjustment is disabled by default, and no qos-rate-adjust is listed in the running-configuration CONFIGURATION Version 8.3.11.1 Version 8.3.7.0 Version 8.3.1.0 Introduced on the Z9000. Introduced on the S4810. Introduced. 1181