Dell Z9000 Configuration Manual page 655

Creating an Output QoS Policy
To create an output QoS policy, use the following commands.
1. Create an output QoS policy.
CONFIGURATION mode
qos-policy-output
2. After you configure an output QoS policy, do one or more of the following:
Scheduler Strict — Policy-based Strict-priority Queueing configuration is done through scheduler
strict. It is applied to Qos-policy-output. When scheduler strict is applied to multiple Queues, high
queue number takes precedence.
Allocating Bandwidth to Queue
Specifying WRED Drop Precedence
Configuring Policy-Based Rate Shaping
To configure policy-based rate shaping, use the following command.
• Configure rate shape egress traffic.
QOS-POLICY-OUT mode
rate-shape
Allocating Bandwidth to Queue
Schedule packets for egress based on Deficit Round Robin (DRR). These strategies both offer a
guaranteed data rate.
The following table lists the default bandwidth weights for each queue, and their equivalent percentage
which is derived by dividing the bandwidth weight by the sum of all queue weights.
Table 39. Default Bandwidth Weights
Queue
0
1
2
3
• Allocate bandwidth to queues.
bandwidth-percentage
Specifying WRED Drop Precedence
Specifying WRED drop precedence is supported on the Z9000 platform.
• Specify a WRED profile to yellow and/or green traffic.
QOS-POLICY-OUT mode
wred
For more information, refer to
Quality of Service (QoS)
Default Weight
1
2
4
8
Applying a WRED Profile to
Equivalent Percentage
6.67%
13.33%
26.67%
53.33%
Traffic.
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