Brocade FastIron Ethernet Switch Traffic Management Guide - Manual (Page 3)

Contents
Preface.....................................................................................................................................5
Document conventions......................................................................................5
Text formatting conventions.................................................................. 5
Command syntax conventions.............................................................. 5
Notes, cautions, and warnings.............................................................. 6
Brocade resources............................................................................................ 7
Getting technical help........................................................................................7
Document feedback.......................................................................................... 7
About This Document................................................................................................................ 9
About This Document........................................................................................9
What’s new in this document.......................................................................... 10
How command information is presented in this guide.....................................10
Quality of Service.................................................................................................................... 11
Supported Quality of Service features............................................................ 11
QoS overview..................................................................................................12
Processing of classified traffic.............................................................12
QoS for Brocade stackable devices................................................................ 19
QoS profile restrictions in a traditional stack....................................... 19
QoS behavior for trusting Layer 2 (802.1p) in a traditional stack........ 19
QoS behavior for trusting Layer 3 (DSCP) in a traditional stack ........ 19
QoS behavior on port priority and VLAN priority in a traditional
stack.............................................................................................. 19
QoS behavior for 802.1p marking in a traditional stack...................... 20
QoS queues.................................................................................................... 20
Queues for the SX-FI48GPP interface module................................... 20
Queues for the SX-FI-8XG interface module...................................... 21
Queues for the ICX 6430 switch......................................................... 22
User-configurable scheduler profile.................................................... 23
QoS priorities-to-traffic assignment.................................................................27
Changing a port priority.......................................................................27
Assigning static MAC entries to priority queues..................................28
Buffer allocation and threshold for QoS queues................................. 28
802.1p priority override................................................................................... 28
Configuration notes and feature limitations ........................................29
Enabling 802.1p priority override........................................................ 29
Marking........................................................................................................... 29
DSCP and CoS global remarking....................................................................29
Configuration considerations and limitations.......................................30
Enabling DSCP marking..................................................................... 30
Example: DSCP marking.................................................................... 30
Enabling CoS marking........................................................................ 31
Example: CoS marking....................................................................... 31
DSCP-based QoS configuration..................................................................... 31
Application notes for DSCP-based QoS............................................. 31
Using ACLs to honor DSCP-based QoS.............................................32
FastIron Ethernet Switch Traffic Management Guide 1
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