Reference Guide

Quality of Service (QoS) | 1207

Quality of Service (QoS)

Overview

FTOS commands for Quality of Service (QoS) include traffic conditioning and congestion

control. QoS commands are supported on all Dell Force10 platforms, as indicated by the

characters that appear under each of the command headings:

c C-Series, s S-Series,

, , or

Z Z-Series.

This chapter contains the following sections:

• Global Configuration Commands

• Per-Port QoS Commands

• Policy-Based QoS Commands

• Queue-Level Debugging (E-Series Only)

Global Configuration Commands

• qos-rate-adjust

qos-rate-adjust

c e s

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.

Syntax

qos-rate-adjustment overhead-bytes

Parameters

Defaults

QoS Rate Adjustment is disabled by default, and no qos-rate-adjust is listed in the

running-configuration

overhead-bytes

Include a specified number of bytes of packet overhead to include in rate

limiting, policing, and shaping calculations.

C-Series and S-Series Range: 1-31

E-Series Range: 1-144