Alcatel-Lucent 7210 SAS E OS Quality Of Service Manual page 45

RED Slopes
Operation and Configuration
Each buffer pool supports a high-priority 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-priority and low-priority RED
slopes are disabled.
In the 7210 SAS E, SRED is supported. SRED uses instantaneous queue length, queue thresholds
provisioned, and drop-rate 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.
7210 SAS-E OS Quality of Service Guide
QoS Policies
Page 45