Chapter 13. Congestion Management and Avoidance

Blueprint topics covered in this chapter:

This chapter covers the following subtopics from the Cisco CCIE Routing and Switching written exam blueprint. Refer to the full blueprint in Table I-1 in the Introduction for more details on the topics covered in each chapter and their context within the blueprint.

  • Class-Based Weighted Fair Queuing (CBWFQ)

  • Random Early Detection (RED)

  • Modified Deficit Round-Robin (MDRR)

Congestion management, commonly called queuing, refers to how a router or switch manages packets or frames while they wait to exit a device. With routers, the waiting occurs when IP forwarding has been completed, so the queuing is always considered to be output queuing. LAN switches often support ...

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