Weighted random early detection

Weighted random early detection (WRED) is a queueing discipline for a <a href="/facts/Network_scheduler/7URA71LE">network scheduler</a> suited for <a href="/facts/Network_congestion_avoidance/9ohkRMso">congestion avoidance</a>. It is an extension to <a href="/facts/Random_early_detection/h2YyDNQL">random early detection</a> (RED) where a single queue may have several different sets of queue thresholds. Each threshold set is associated to a particular <a href="/facts/Traffic_shaping/VCF0Gb3b">traffic class</a>.
For example, a queue may have lower thresholds for lower priority packet. A queue buildup will cause the lower priority packets to be dropped, hence protecting the higher priority <a href="/facts/Network_packet/xCYf8SJu">packets</a> in the same queue. In this way <a href="/facts/Quality_of_service/joz9VkUm">quality of service</a> prioritization is made possible for important packets from a pool of packets using the same buffer.
It is more likely that standard traffic will be dropped instead of higher prioritized traffic.

Weighted random early detection open-in-new

Weighted random early detection