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Queue Management Policies
and 7210 SAS-T , and 7210 SAS-T Queue management policies allows the user to define the
queue buffer and WRED slope parameters.
The 7210 SAS supports a single buffer pool per node. All the queues created in the system are
allocated buffers from this system pool. The default buffers are allocated to the queues accordingly
when they are associated with a SAP or a network port.
Queue management policies allow the user to define the CBS, MBS and WRED parameters for
use by the queue. The CBS and MBS parameters are used to allocate the appropriate amount of
buffers from the system pool to the queues. The WRED parameters allow the user to define the
WRED slope characteristics. User can define a high-slope and a low-slope for each of the queues.
High-slope is used for in-profile packets being enqueued into the queues and low-priority slope is
used for out-of-profile packets being enqueued into the queues.
By default each queue is associated with a default queue-management policy. The default policy
allocates the appropriate amount of CBS and MBS buffers based on whether the queue is
associated with a SAP or network port.
Note: If WRED is not configured, then taildrop is used.
7210 SAS-X and 7210 SAS-R6 OS Quality of Service Guide
QoS Policies
Page 59
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