Dell Networking PowerSwitch OS9: How to set up Port Based VoIP QoS

Summary: How to set up QoS on Dell Networking PowerSwitches running OS9 for Voice over IP (VoIP).

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
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Instructions

 This article discusses how to set up Port Based VoIP QoS on Dell Networking Switches running OS9.

 The Following platforms do not support this command as it was deprecated in earlier versions of OS9.
1. Z9100
2. S6100
3. S5048

 

QoS Configuration Port Based VOIP Example

 

Here the VoIP phone sends traffic with Differentiated Services Code Point (DSCP) value 46.  The Dell Networking OS9 switch will be configured to trust the ingress traffic DSCP value and set priority to the hardware queue servicing this traffic.
 
Follow these steps:
 
1.  Configure an input policy map to trust ingressed DSCP values.
2.  Attach the input policy map to and interface.
3.  Configure the hardware queue mapped to DSCP value 46 to use strict priority.

  • By default, the map is set to a DSCP value of 46 mapped to a hardware queue of 2.
     
Command Parameters
Force10# conf Enter configuration mode.
Force10(conf)# policy-map-input my-trust-dscp Create an input policy map.  This line is using "my-trust-dscp" as the example name.
Force10(conf-policy-map-in)# trust diffserv Trust DSCP values.
Force10(conf-policy-map-in)# interface te 0/0 Enter interface configuration mode.  You can use a range command here.
Force10(conf-if-te-0/0)# service-policy input my-trust-dscp
Force10(conf-if-te-0/0)# exit		 Attach the policy map to the interface as an input policy.
Force10(conf)# strict-priority unicast 2 Specify a hardware queue to use strict priority scheduling.
 
Dell Networking OS9 devices use the following default mappings for DSCP values to particular hardware queues:

 
DSCP Value S,C,Z-series Queue E-series Queue
0-15 0 0-1
16-31 1 2-3
32-47 2 4-5
48-63 3 6-7

 

Verify Configuration 

Force10# show qos policy-map summary
 
   Interface            policy-map-input                       policy-map-output
   Te 0/0                 my-trust-dscp                                    -

Force10# show qos policy-map detail te 0/0
 
   Interface TenGigabitEthernet 0/0

   Policy-map-input   my-trust-dscp
   Trust diffserv
   Queue#                Class-map-name                    QoS-policy-name

Affected Products

Force10 S25-01-GE-24P, Force10 S25-01-GE-24T, Force10 S25-01-GE-24V, Force10 S50-01-GE-48T-V, Force10 S50-01-GE-48T, PowerSwitch S3048-ON, PowerSwitch S4048-ON, PowerSwitch S4810P, PowerSwitch S4810-ON, PowerSwitch S5000, Force10 S50P, Force10 S55T , Force10 S60-44T, PowerSwitch S6000, PowerSwitch S6000 ON, Force10 Z9000, Dell Networking Z9500, Dell Networking S3100 Series, PowerSwitch Z9100-ON ...
Article Properties
Article Number: 000110390
Article Type: How To
Last Modified: 02 Sept 2025
Version:  6
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