Queuing Mechanisms Objectives

show queueing priority

• The show queueing priority command displays only the nondefault parameters.

• Router#show queueing priority
• Current priority queue configuration:
• List Queue Args
• 1 high protocol ip list 101
• 1 medium interface Ethernet6/0

Summary

• Upon completing this lesson, you should be able to:
• Describe priority queuing
• Describe the benefits and drawbacks of priority queuing
• Configure priority queuing on Cisco routers
• Monitor and troubleshoot priority queuing

Lesson Review

• When would you use priority queuing?
• What are the benefits and drawbacks of priority queuing?
• How many classes does priority queuing support?
• How does priority queuing schedule packets?

• © 2001, Cisco Systems, Inc.

• Custom Queuing

• QOS v1.0—3-

Objectives

• Upon completing this lesson, you will be able to:
• Describe custom queuing
• Describe the benefits and drawbacks of custom queuing
• Configure custom queuing on Cisco routers
• Monitor and troubleshoot Custom Queuing

Custom Queuing

• Custom queuing (CQ) uses 16 FIFO queues for user-defined traffic classes.

• Custom Queuing System

• Hardware
• Queuing System

• Class 1?

• Queue 1

• Round-
• Robin
• Scheduler

• Interface

• Forwarded Packets

• Hardware Q

• Tail Drop

• Class 2?

• Queue 2

• Tail Drop

• Class 16?

• Queue 16

• Tail Drop