Alcatel-Lucent 7210 SAS E OS Quality Of Service Manual page 46

QoS Overview
RED Slopes
Operation and Configuration
Each buffer pool supports a high-priority RED slope, a non-TCP RED slope, and a low-priority
RED slope. The high-priority RED slope manages access to the shared portion of the buffer pool
for high-priority or in-profile packets. The low-priority RED slope manages access to the shared
portion of the buffer pool for low-priority or out-of-profile packets.
By default, the high-slope and low-slope for all the 8 queues are disabled.
In the 7210 SAS E, SRED is supported. SRED uses average queue lengths, queue thresholds
provisioned, and drop probablility to calculate the packet's eligibility to be enqueued. The
committed portion of the buffer pool is exclusively used by a queue to enqueue traffic within
committed rate.
Page 46 7210 SAS E OS Quality of Service Guide