Dell Force10 MXL Blade - Create an Output Qos Policy

424 | Quality of Service (QoS)
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1. Create a Layer 3 input QoS policy using the qos-policy-input command from CONFIGURATION mode.
Create a Layer 2 input QoS policy by specifying the keyword
layer2 after the qos-policy-input command.
2. After you create an input QoS policy, do one or more of the following:
• Configure Policy-Based Rate Policing
• Set a DSCP Value for Egress Packets
• Set a dot1p Value for Egress Packets
Configure Policy-Based Rate Policing
To rate police ingress traffic, use the rate-police command from QOS-POLICY-IN mode.
Set a DSCP Value for Egress Packets
You can set the DSCP value for egress packets based on ingress QOS classification. The 6 bits that are
used or DSCP are also used to identify the queue in which traffic is buffered.
Figure 24-9. Marking DSCP Values for Egress Packets
Set a dot1p Value for Egress Packets
To set a dot1p value for egress packets, use the set mac-dot1p command from QOS-POLICY-IN
mode.When you set a dot1p value, FTOS displays an informational message advising you of the queue to
which you should apply the QoS policy (using the command service-queue from POLICY-MAP-IN
mode).
Create an Output QoS Policy
To create an output QoS policy, follow these steps:
1. Create an output QoS policy using the
qos-policy-output command from CONFIGURATION mode.
2. After you configure an output QoS policy, do one or more of the following
• Configure Policy-Based Rate Shaping
• Allocate Bandwidth to the Queue
• Configure a Scheduler to Queue
• Specify WRED Drop Precedence
FTOS#config
FTOS(conf)#qos-policy-input my-input-qos-policy
FTOS(conf-qos-policy-in)#set ip-dscp 34
FTOS(conf-qos-policy-in)#show config
!
qos-policy-input my-input-qos-policy
set ip-dscp 34
FTOS(conf-qos-policy-in)#end
FTOS#