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CloudEngine 12800 and 12800E V200R005C10 Configuration Guide - QoS

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 ACL-based Redirection

Configuring ACL-based Redirection

Pre-configuration Tasks

Before configuring ACL-based redirection, complete the following tasks:

  • Configure link layer attributes of interfaces to ensure that the interfaces work properly.

  • Configure an ACL.

Context

ACL-based redirection allows the device to redirect packets matching an ACL to the CPU or a specified interface.

If the traffic-redirect (system view), traffic-redirect (VLAN view), and traffic-redirect (interface view) commands are configured simultaneously, the ACL-based simplified traffic policies that are applied to the interface, VLAN, and system take effect in descending order of priority.

  • Redirecting packets that match traffic classification rules to the CPU consumes CPU resources. When a traffic policy containing redirection to the CPU is applied, the device redirects packets matching traffic classification rules to the CPU, affecting the CPU. Exercise caution when applying the traffic policy containing redirection to the CPU.
  • If an ACL-based simplified traffic policy needs to be applied to multiple VLANs and interfaces or multiple rules for matching packets from different source IP addresses need to be bound to the same ACL-based simplified traffic policy, you are advised to add these VLANs, source IP addresses, and interfaces to the same QoS group and apply the ACL-based simplified traffic policy to the QoS group.

Procedure

  • Configure redirection in the system.
    1. Run system-view

      The system view is displayed.

    2. Run traffic-redirect acl { { { basic-acl | acl-name } | { advanced-acl | acl-name } } | { l2-acl | acl-name } } * { cpu | interface interface-type interface-number [ fail-action forward ] } global [ slot slot-id ] inbound

      The ACL-based redirection function is configured in the system or a specified slot.

    3. Run commit

      The configuration is committed.

  • Configure redirection in a VLAN.
    1. Run system-view

      The system view is displayed.

    2. Run vlan vlan-id

      The VLAN view is displayed.

    3. Run traffic-redirect acl { { { basic-acl | acl-name } | { advanced-acl | acl-name } } | { l2-acl | acl-name } } * { cpu | interface interface-type interface-number [ fail-action forward ] } inbound

      The ACL-based redirection function is configured in the VLAN.

    4. Run commit

      The configuration is committed.

  • Configure redirection on 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-redirect acl { { { basic-acl | acl-name } | { advanced-acl | acl-name } } | { l2-acl | acl-name } } * { cpu | interface interface-type interface-number [ fail-action forward ] } inbound

      The ACL-based redirection function is configured on the interface.

    4. Run commit

      The configuration is committed.

  • Configure redirection in 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.

      • Run the group-member vlan { vlan-id1 [ to vlan-id2 ] } &<1-8> command to add VLANs to the QoS group.

      • (For the CE12800E) Run the group-member ip source ip-address { mask | mask-length } command to add source IP addresses to the QoS group.

    4. Run traffic-redirect acl { { { basic-acl | acl-name } | { advanced-acl | acl-name } } | { l2-acl | acl-name } } * { cpu | interface interface-type interface-number [ fail-action forward ] } inbound

      The ACL-based redirection function is configured in the QoS group.

    5. Run commit

      The configuration is committed.

Verifying the Configuration

Run the display traffic-policy applied-record traffic-redirect [ global [ slot slot-id ] | interface interface-type interface-number | vlan vlan-id | qos group group-id ] [ inbound ] command to check the application record of a specified traffic policy.

Follow-up Procedure

For the CE12800, if a low-priority traffic policy takes effect before you apply a high-priority traffic policy, ACL rules may be slow to take effect. Consequently, service processing will be delayed. You can run the traffic-policy fast-mode command in the system view to enable fast delivery of ACLss. This ensures that ACL rules take effect rapidly and services can be processed in real time.

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Updated: 2021-08-12

Document ID: EDOC1100075349

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