1. A system comprising:a plurality of network interfaces;
one or more buffers configured to temporarily store data units received over the plurality of network interfaces;
an arbitration component configured to release buffered data units from the one or more buffers to a downstream component for further processing;
a congestion detection component configured to detect when an amount of buffer space, in the one or more buffers, used to store data units associated with an entity, indicates a particular level of congestion in the one or more buffers related to the entity;
wherein the arbitration component is further configured to, when the congestion detection component detects, in the one or more buffers, the particular level of congestion related to the entity, enable a burst control mechanism configured to limit a release rate of the data units that are associated with the entity, from the one or more buffers, to a particular rate, wherein the arbitration component is configured to not limit the release rate to the particular rate when the burst control mechanism is disabled.