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When queues use shared buffer space, buffers are more efficiently utilized.

Queues that use reserved buffer space will have memory available for their reserved portion.

When a queue is not using its reserved portion, other queues can use it.

Using reserved buffer space prevents a queue from being starved of buffer resources by other queues.

Queue parameters with which the queue will compete for bandwidth.

The level of hierarchy with which a group of schedulers is associated.

Bandwidth controls that limit each child scheduler or child queues associated with the scheduler.

The maximum bandwidth that the parent scheduler can offer its child queues or schedulers.

A network policy for every network interface configured on the port.

A slope policy for the port on ingress.

A network queue policy for the corresponding MDA on ingress.

A network queue policy for the port on egress.

When applied at the port level for access ingress.

When applied at the FP (Forwarding Pass) level for access ingress.

When applied at the FP (Forwarding Pass) level for network ingress.

When applied at the port level for network egress.

ToS

DSCP

PREC

EXP

Several Tier 1, Tier 2, and Tier 3 schedulers can be defined within a policy.

A queue’s parent scheduler must be a Tier-3 scheduler.

The parent must have a higher level in the hierarchy.

If no parent is configured, the queue/scheduler is considered orphaned.

The root arbiter can be the parent of a tier 2 arbiter.

A tier 1 arbiter can be the parent of a policer.

A child policer can have a priority level from 0 to 10.

Weight is used by a parent arbiter to allocate bandwidth among children of equal level

WRED monitors the shared buffer space utilization over a period of time.

WRED disables the TCP slow-start congestion control mechanism.

WRED uses two configurable slopes for each buffer pool: a high slope and a low slope.

WRED uses the shared buffer utilization, instead of the individual queue depth, to get a better picture of the average resource utilization of the shared buffer space.

WRED polices the shared buffer pool and marks all packets above a certain rate as "discard eligible."

The larger the configured MBS value, the lower the amount of shaping performed.

When policing is enabled on the SAP-ingress, all traffic is considered as in-profile.

Setting the CIR to 1000 and the PIR to max will enable shapeless policing at 1 Mbps within the SAP-egress policy.

Configuring MBS to equal CBS will disable shaping.

Setting the CIR and PIR to equal values disables soft-policing.

It determines the packet’s forwarding class based on classification criteria

It modifies the current packet’s forwarding class to indicate promotion or demotion

It sets the TOS, DSCP, EXP, or Dot1p field based on classification criteria

It modifies the current TOS, DSCP, EXP, or Dot1p marking to indicate promotion or demotion