Large-Scale IP Network Solutions (CCIE Professional Development)

Congestion-Management Algorithms

Congestion-management techniques are reactive, which means they determine how the network behaves when congestion is present. Unless they are configured by default within IOS, such as selective packet discard or FIFO, it is not wise to deploy these algorithms on a large scale. Instead, try using the congestion-avoidance techniques described later in this chapter.

Despite their limited scalability, user-configured congestion-management algorithms can be useful in isolated instances, such as a relatively low-bandwidth link dedicated to a special purpose. These algorithms are all stateless because each router must be individually configured (or programmed) to implement the desired policy.

First-In, First-Out ...