ExtremeWare XOS 11.3 Concepts Guide
289
15
Quality of Service
This chapter covers the following topics:
●
Overview of Policy-Based Quality of Service on page 289
●
Applications and Types of QoS on page 290
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Configuring QoS on page 292
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QoS Profiles on page 293
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Traffic Groupings on page 295
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Verifying QoS Configuration and Performance on page 307
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Guidelines for Configuring QoS on page 309
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Egress Traffic Rate Limiting—BlackDiamond 8800 Family of Switches and Summit X450 Switch Only
on page 309
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Bi-Directional Rate Shaping—BlackDiamond 10K Switch Only on page 310
Policy-based Quality of Service (QoS) is a feature of ExtremeWare XOS and the Extreme Networks
switch architecture that allows you to specify different service levels for traffic traversing the switch.
Policy-based QoS is an effective control mechanism for networks that have heterogeneous traffic
patterns. Using Policy-based QoS, you can specify the service level that a particular traffic type receives.
Overview of Policy-Based Quality of Service
Policy-based Quality of Service (QoS) is a feature of ExtremeWare XOS and the Extreme Networks
switch architecture that allows you to specify different service levels for traffic traversing the switch.
Policy-based QoS is an effective control mechanism for networks that have heterogeneous traffic
patterns. Using Policy-based QoS, you can specify the service level that a particular traffic type receives.
Policy-based QoS allows you to protect bandwidth for important categories of applications or to
specifically limit the bandwidth associated with less critical traffic.
For example, if voice-over-IP (VoIP) traffic requires a reserved amount of bandwidth to function
properly, using policy-based QoS, you can reserve sufficient bandwidth critical to this type of
application. Other applications deemed less critical can be limited so as to not consume excessive
bandwidth.
On the BlackDiamond 10K switch, the switch contains separate hardware queues on every physical
port. On the BlackDiamond 8800 family of switches (formerly known as Aspen) and the Summit X450
switch, the switch has two default queues (based on flows), and you can configure up to six additional
queues. Each queue is programmed by ExtremeWare XOS with specific parameters that modify the
forwarding behavior of the switch and affect how the switch transmits traffic for a given queue on a
physical port.
The switch tracks and enforces the specified parameters on every queue for every port. When two or
more queues on the same physical port are contending for transmission, the switch prioritizes use so
long as the respective queue management parameters are satisfied. Up to eight queues per port are
available.
Summary of Contents for ExtremeWare XOS 11.3
Page 20: ...Contents ExtremeWare XOS 11 3 Concepts Guide 20...
Page 25: ...1 Using ExtremeWare XOS...
Page 26: ......
Page 38: ...ExtremeWare XOS Overview ExtremeWare XOS 11 3 Concepts Guide 38...
Page 58: ...Accessing the Switch ExtremeWare XOS 11 3 Concepts Guide 58...
Page 146: ...Configuring Slots and Ports on a Switch ExtremeWare XOS 11 3 Concepts Guide 146...
Page 218: ...Status Monitoring and Statistics ExtremeWare XOS 11 3 Concepts Guide 218...
Page 240: ...Virtual LANs ExtremeWare XOS 11 3 Concepts Guide 240...
Page 248: ...Virtual Routers ExtremeWare XOS 11 3 Concepts Guide 248...
Page 278: ...Access Lists ACLs ExtremeWare XOS 11 3 Concepts Guide 278...
Page 288: ...Routing Policies ExtremeWare XOS 11 3 Concepts Guide 288 entry deny_rest if then deny...
Page 344: ...Security ExtremeWare XOS 11 3 Concepts Guide 344...
Page 393: ...2 Using Switching and Routing Protocols...
Page 394: ......
Page 454: ...Spanning Tree Protocol ExtremeWare XOS 11 3 Concepts Guide 454...
Page 484: ...Extreme Standby Router Protocol ExtremeWare XOS 11 3 Concepts Guide 484...
Page 514: ...IPv4 Unicast Routing ExtremeWare XOS 11 3 Concepts Guide 514...
Page 530: ...IPv6 Unicast Routing ExtremeWare XOS 11 3 Concepts Guide 530...
Page 538: ...RIP ExtremeWare XOS 11 3 Concepts Guide 538...
Page 556: ...OSPF ExtremeWare XOS 11 3 Concepts Guide 556...
Page 566: ...OSPFv3 ExtremeWare XOS 11 3 Concepts Guide 566...
Page 589: ...3 Appendixes...
Page 590: ......
Page 640: ...CNA Agent ExtremeWare XOS 11 3 Concepts Guide 640...
Page 670: ...Glossary ExtremeWare XOS 11 3 Concepts Guide 670...
Page 698: ...Index ExtremeWare XOS 11 3 Concepts Guide 698...