Feng Gang National Laboratory of Communication,UESTC Aug 2017 Ver 1.4 Drop priorities Drop lower-priority packets first 。 How to choose? endpoint marks packets - regulator marks packets congestion loss priority(CLP)bit in packet header Marked packets Policer also Switch preferentially Discards Source marks marks packets marked packets some packets 2616009:Network Traffic Engineering 5:Buffer Management Page.62616009: Network Traffic Engineering Feng Gang National Laboratory of Communication, UESTC Aug 2017 Ver 1.4 5: Buffer Management Page.6 Drop priorities • Drop lower-priority packets first • How to choose? - endpoint marks packets - regulator marks packets - congestion loss priority (CLP) bit in packet header Source marks some packets Marked packets Policer also marks packets Switch preferentially Discards marked packets