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Configuration Guide - QoS

CloudEngine 8800, 7800, 6800, and 5800 V200R002C50

This document describes the configurations of QoS functions, including MQC, priority mapping, traffic policing, traffic shaping, interface-based rate limiting, congestion avoidance, congestion management, packet filtering, redirection, traffic statistics, and ACL-based simplified traffic policy.
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Configuring Re-marking

Configuring Re-marking

Context

Re-marking allows the device to re-mark packets matching traffic classification rules so that packets are scheduled or forwarded based on re-marked priorities or flag bits.

Procedure

  1. Configure a traffic classifier.
    1. Run system-view

      The system view is displayed.

    2. Run traffic classifier classifier-name [ type { and | or } ]

      A traffic classifier is created and the traffic classifier view is displayed, or the view of an existing traffic classifier is displayed.

      and is the logical operator between the rules in a traffic classifier, which means that:
      • If a traffic classifier contains ACL rules, packets match the traffic classifier only if they match one ACL rule and all the non-ACL rules.

      • If a traffic classifier does not contain any ACL rules, packets match the traffic classifier only if they match all the rules in the classifier.

      The logical operator or means that packets match a traffic classifier if they match one or more rules in the classifier.

      By default, the relationship between rules in a traffic classifier is or.

    3. Run if-match

      Matching rules are defined for the traffic classifier.

      For details about matching rules in a traffic classifier, see "Configuring a Traffic Classifier" in "MQC Configuration" of the CloudEngine 8800, 7800, 6800, and 5800 Series Switches Configuration Guide - QoS Configuration Guide.

    4. Run commit

      The configuration is committed.

    5. Run quit

      Exit from the traffic classifier view.

  2. Configure a traffic behavior.
    1. Run traffic behavior behavior-name

      A traffic behavior is created and the traffic behavior view is displayed, or the view of an existing traffic behavior is displayed.

    2. Run the following commands as required.
      • (For CE6870EI and CE6880EI) Run remark 8021p 8021p-value

        The device is configured to re-mark the 802.1p priority in packets matching the traffic classifier.

      • (For CE switches excluding CE6870EI and CE6880EI) Run remark 8021p { 8021p-value | inner-8021p }

        The device is configured to re-mark the 802.1p priority in packets matching the traffic classifier.

      • Run remark dscp { dscp-name | dscp-value }

        The device is configured to re-mark the DSCP priority in packets matching the traffic classifier.

      • Run remark local-precedence { local-precedence-name | local-precedence-value } [ green | yellow | red ]

        The device is configured to re-mark the internal priority in packets matching the traffic classifier.

      • Run remark vxlan reserved-value reserved-value

        The device is configured to re-mark the VXLAN reserved field in packets matching the traffic classifier.

        NOTE:

        The CE5810EI, CE5850EI, CE5850HI, CE5855EI, CE6810LI, and CE6810EI do not support this command.

      • Run remark qos-local-id qos-local-id

        The device is configured to re-mark the local ID in packets matching the traffic classifier.

        NOTE:

        Only the CE6850HI, CE6850U-HI, CE6851HI, CE6855HI, CE6856HI, CE6860EI, CE6870EI, CE7850EI, CE7855EI, CE8850EI, and CE8860EI switches support this command.

    3. Run commit

      The configuration is committed.

    4. Run quit

      Exit from the traffic behavior view.

    5. Run quit

      Exit from the system view.

  3. Configure a traffic policy.
    1. Run system-view

      The system view is displayed.

    2. Run traffic policy policy-name

      A traffic policy is created and the traffic policy view is displayed, or the view of an existing traffic policy is displayed.

    3. Run classifier classifier-name behavior behavior-name [ precedence precedence-value ]

      A traffic behavior is bound to a traffic classifier in the traffic policy.

    4. Run commit

      The configuration is committed.

    5. Run quit

      Exit from the traffic policy view.

    6. Run quit

      Exit from the system view.

  4. Apply the traffic policy.
    NOTE:
    • The traffic policy containing remark local-precedence or remark vxlan reserved-value cannot be used in the outbound direction.

    • For details about the configuration guidelines of applying traffic policies in different views on the CE switches excluding CE6870EI, see Licensing Requirements and Limitations for MQC (CE Switches Excluding CE6870EI and CE6875EI).

    • For details about the configuration guidelines of applying traffic policies in different views on the CE6870EI, see Licensing Requirements and Limitations for MQC (CE6870EI and CE6875EI).

    • If a traffic policy needs to be applied to multiple VLANs and interfaces or multiple traffic classifiers for matching packets from different source IP addresses need to be bound to the same traffic policy, you are advised to add these VLANs, source IP addresses, and interfaces to the same QoS group and apply the traffic policy to the QoS group.

    • Applying a traffic policy to an interface
      1. Run system-view

        The system view is displayed.

      2. Run interface interface-type interface-number

        The interface view is displayed.

      3. Run traffic-policy policy-name { inbound | outbound }

        A traffic policy is applied to the interface.

      4. Run commit

        The configuration is committed.

    • Applying a traffic policy to a VLAN
      1. Run system-view

        The system view is displayed.

      2. Run vlan vlan-id

        The VLAN view is displayed.

      3. Run traffic-policy policy-name { inbound | outbound }

        A traffic policy is applied to the VLAN.

        The system applies traffic policing to the packets that belong to the VLAN and match traffic classification rules in the inbound or outbound direction.

      4. Run commit

        The configuration is committed.

    • Applying a traffic policy to the system
      1. Run system-view

        The system view is displayed.

      2. Run traffic-policy policy-name global [ slot slot-id ] { inbound | outbound }

        A traffic policy is applied to the system.

      3. Run commit

        The configuration is committed.

    • Applying a traffic policy to a QoS group
      1. Run system-view

        The system view is displayed.

      2. Run qos group group-name

        The QoS group view is displayed.

      3. Run the following commands as required:
        • Run the group-member interface { interface-type interface-number1 [ to interface-type interface-number2 ] } &<1-8> command to add interfaces to the QoS group.

        • (Only for CE6870EI and CE6880EI) Run the group-member vlan { vlan-id1 [ to vlan-id2 ] } &<1-8> command to add VLANs to the QoS group.

        • (For CE switches excluding the CE6870EI and CE6880EI) Run the group-member ip source ip-address { mask | mask-length } command to add source IP addresses to the QoS group.

      4. Run traffic-policy policy-name inbound

        A traffic policy is applied to the QoS group.

      5. Run commit

        The configuration is committed.

    • Applying a traffic policy to a BD
      1. Run system-view

        The system view is displayed.

      2. Run bridge-domain bd-id

        The BD view is displayed.

      3. Run traffic-policy policy-name { inbound | outbound }

        A traffic policy is applied to the BD.

      4. Run commit

        The configuration is committed.

Verifying the Configuration

  • Run the display traffic classifier [ classifier-name ] command to check the traffic classifier configuration.
  • Run the display traffic behavior [ behavior-name ] command to check the traffic behavior configuration on the device.
  • Run the display traffic policy [ policy-name [ classifier classifier-name ] ] command to check the traffic policy configuration.

  • Run the display traffic-policy applied-record [ policy-name ] [ global [ slot slot-id ] | interface interface-type interface-number | vlan vlan-id | vpn-instance vpn-instance-name | qos group group-id | bridge-domain bd-id ] [ inbound | outbound ] command to check the application record of a specified traffic policy.

  • Run the display system tcam fail-record [ slot slot-id ] command to display TCAM delivery failures.
  • Run the display system tcam service brief [ slot slot-id ] command to display the group index and rule count occupied by different services.
  • Run the display system tcam service { cpcar slot slot-id | service-name slot slot-id [ chip chip-id ] } command to display IDs of entries that deliver services on the specified chip or in the specified slot.
  • (For CE6870EI) Run the display system tcam match-rules slot slot-id [ [ ingress | egress | group group-id ] | [ chip chip-id ] ] * command to display matched entries.
  • (For CE6880EI switches) Run the display system tcam match-rules slot slot-id chip chip-id index index-id command to display matched entries.
  • (Models excluding the CE6870EI and CE6880EI) Run the display system tcam match-rules slot slot-id [ [ ingress | egress | group group-id ] | [ delay-time time-value ] ] * command to display matched entries.
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Updated: 2019-03-21

Document ID: EDOC1000166640

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