HP ProCurve Series 6120 Blade Switches Advanced Traffic Management Guide

5-1
5
Quality of Service (QoS): Managing
Bandwidth More Effectively
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Classifiers for Prioritizing Outbound Packets . . . . . . . . . . . . . . . . . . . 5-10
Packet Classifiers and Evaluation Order . . . . . . . . . . . . . . . . . . . 5-10
Preparation for Configuring QoS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
Preserving 802.1p Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
Steps for Configuring QoS on the Switch . . . . . . . . . . . . . . . . . . . . . . . 5-11
Using QoS Classifiers To Configure
Quality of Service for Outbound Traffic . . . . . . . . . . . . . . . . . . . . . . . 5-13
Viewing the QoS Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
No Override . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
QoS UDP/TCP Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
Assigning an 802.1p Priority Based on TCP
or UDP Port Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
Operating Notes on Using TCP/UDP Port Ranges . . . . . . . . . . . . 5-18
Assigning a DSCP Policy Based on TCP or UDP Port Number . 5-19
QoS IP-Device Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22
Assigning a Priority Based on IP Address . . . . . . . . . . . . . . . . . . . 5-23
Assigning a DSCP Policy Based on IP Address . . . . . . . . . . . . . . 5-24
QoS IP Type-of-Service (ToS) Policy and Priority . . . . . . . . . . . . . . . 5-26
Assigning an 802.1p Priority to IPv4 Packets on the Basis
of the ToS Precedence Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-27
Assigning an 802.1p Priority to IPv4 Packets on the
Basis of Incoming DSCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-28
Assigning a DSCP Policy on the Basis of the DSCP in IPv4
Packets Received from Upstream Devices . . . . . . . . . . . . . . . . . . 5-33