Quality of Service (QoS) Configuration

QoS values need administration to provide priority to some packets over others. For example, voice packets get higher priority than data packets to provide a better quality of service in high priority voice traffic networks.

The profile QoS screen maps the 6-bit Differentiated Service Code Point (DSCP) code points to the older 3-bit IP Precedent field located in the Type of Service byte of an IP header. DSCP is a protocol for specifying and controlling network traffic by class so certain traffic types get precedence. DSCP specifies a specific per-hop behavior applied to a packet.

To define an QoS configuration for DSCP mappings:

  1. Select Configuration > Profiles > Network.

  2. Expand the Network menu to display its submenu options.

  3. Select Quality of Service.

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  4. Set the following parameters for IP DSCP mappings for untagged frames:

    DSCP

    Lists the DSCP value as a 6-bit parameter in the header of every IP packet used for packet classification.

    802.1p Priority

    Assign a 802.1p priority as a 3-bit IP precedence value in the Type of Service field of the IP header used to set the priority. The valid values for this field are 0-7. Up to 64 entries are permitted. The priority values are:

    0 – Best Effort

    1 – Background

    2 – Spare

    3 – Excellent Effort

    4 – Controlled Load

    5 – Video

    6 – Voice

    7 – Network Control

  5. Use the spinner controls within the 802.1p Priority field for each DSCP row to change the priority value.

  6. Select the OK button located to save the changes. Select Reset to revert to the last saved configuration.