Weighted Fair Queuing

There are two implementations of Weighted Fair Queuing (WFQ) in IOS:

  • Platform-independent WFQ

  • Distributed Weighted Fair Queuing (DWFQ)

All Cisco platforms covered in this book, except Cisco 12000, support platform-independent WFQ. DWFQ is available only on VIP interfaces on 7500 series routers when dCEF switching is enabled.

Platform-Independent WFQ

IOS has two implementations of platform-independent WFQ:

  • Flow-Based WFQ

  • Class-Based CBWFQ

Flow-Based WFQ

Flow-Based WFQ is similar to custom queuing in its effect on traffic streams, but rather than defining a static policy to sort the packets into the individual queues, the streams are sorted automatically. Flow-Based WFQ is a legacy congestion management feature in IOS and ...

Get Inside Cisco IOS Software Architecture (CCIE Professional Development) now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.