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NE40E V800R010C10SPC500 Configuration Guide - QoS 01

This is NE40E V800R010C10SPC500 Configuration Guide - QoS
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(Optional) Configuring the DSCP of protocol packets

(Optional) Configuring the DSCP of protocol packets

You can set the Differentiated Services Code Point (DSCP) values of management or control protocol packets sent by the local device, and enable protocol packets to enter the specified internal priority queue and obtain corresponding colors based on the DSCP values.

Context

Currently, when the NE40E performs internal scheduling on protocol packets, by default, the NE40E places protocol packets to the CS6 queue without the color, and the priority of the packets remains unchanged. If you use the CS6 queue for another purpose or not for service forwarding, services are affected. In addition, on the downstream device, scheduling requirements of specified protocol packets may fail to be met because these packets may enter the low-priority QoS queue. Therefore, to allow for flexible packet scheduling, allow these packets to enter other queues.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run host-packet type { management-protocol | control-protocol } dscp dscp-value

    The DSCP value of management or control protocol packets is set.

    NOTE:
    The DSCP value specifies the priority of a type of protocol, whereas the ToS value specifies the priority of a specific protocol. The ToS value takes precedence over the DSCP value:
    • If the ToS value is a default one but the DSCP value is a configured one, the DSCP value takes effect.
    • If both the ToS and DSCP values are configured, the ToS value takes effect.

  3. Run host-packet dscp dscp-value map local-service service-class [ color color ]

    Mappings between DSCP values of protocol packets and internal priorities and between DSCP values and colors are configured.

    NOTE:

    The DSCP value in the host-packet type command only indicates the priority of protocol packets. 802.1p priorities of Layer 2 protocol packets are mapped from the DSCP value based on the DS domain configured on the outbound interface. EXP priorities of MPLS packets are the leftmost 3 bits of DSCP value. If this command is not used, sent protocol packets carry the preconfigured priority.

  4. Run commit

    The configuration is committed.

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Updated: 2019-01-03

Document ID: EDOC1100055024

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