Network queueing discipline for congestion avoidance
Weighted random early detection (WRED) is a queueing discipline for a network scheduler suited for congestion avoidance.[1] It is an extension to random early detection (RED) where a single queue may have several different sets of queue thresholds. Each threshold set is associated to a particular traffic class.
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 packets in the same queue. In this way quality of service prioritization is made possible for important packets from a pool of packets using the same buffer.[2]
It is more likely that standard traffic will be dropped instead of higher prioritized traffic.
^"Congestion Avoidance Overview". Cisco. Archived from the original on 28 February 2014. Retrieved 2014-02-28.
^"Class-Based Weighted Fair Queueing and Weighted Random Early Detection". Cisco. Retrieved 2020-05-07.
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