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AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
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How Do I Ensure the Bandwidth for High-priority Services (Using the Web Platform)?

How Do I Ensure the Bandwidth for High-priority Services (Using the Web Platform)?

Networking Requirements

In Figure 29-89, Router serves as the egress gateway of the enterprise and connects to the Internet through GE0/0/1. GE0/0/1 uses a static IP address; the gateway address of Router is; the DNS server addresses of Router are and Intranet users access the Internet after address translation through the network address translation (NAT) service deployed on Router. The voice, video, and data packets on the LAN of the enterprise are transmitted to Eth2/0/0 through Switch. Packets of different services are identified by DSCP priority on the LAN, and are sent to the Internet through GE0/0/1 on Router. The Internet bandwidth of the enterprise is 10 Mbit/s. The enterprise wants the voice service packets to be forwarded preferentially and 4 Mbit/s bandwidth can be ensured for the voice service.

Figure 29-89  Networking diagram for ensuring the bandwidth for high-priority services

Configuration Roadmap

The configuration roadmap is as follows:
  1. Complete basic network configurations. (If basic network configurations have been completed, skip this step and go to step 2. You only need to perform rate limit configurations.)
    • Set parameters, such as the interface IP address and gateway address on GE0/0/1.

    • Create VLAN 10 and VLANIF 10 and use VLANIF 10 as the gateway of the network segment Create VLAN 20 and VLANIF 20 and use VLANIF 20 as the gateway of the network segment Add the Layer 2 Ethernet interface Eth0/0/2 connecting to Switch to VLAN 10 and VLAN 20 as a trunk interface.

  2. Apply the traffic policy on the outbound interface GE0/0/1 of the router. In the policy, classify traffic by DSCP priority of packets and specify the queues of different priorities for different service packets. Use the low latency queue (LLQ) to forward voice service packets and specify the minimum bandwidth for voice service packets.


  1. Configure GE0/0/1, add the Layer 2 Ethernet interface Eth0/0/2 to VLANs, and create VLANIF interfaces.

    1. Configure GE0/0/1.
      Choose WAN Access > Ethernet Interface and click Create. In the displayed dialog box, set parameters according to Figure 29-90 and click OK.
      Figure 29-90  Creating an Ethernet interface

    2. Choose LAN Access > LAN > VLAN Interface and click Create. In the displayed dialog box, set parameters according to Figure 29-91 and click OK. Figure 29-91 shows the settings for VLANIF 10. The settings for VLANIF 20 are similar, and are not mentioned here.
      Figure 29-91  Creating a VLAN interface

    3. Configure VLANIF 20 by referring to the settings in the previous step.

  2. Configure a traffic policy to preferentially forward voice service packets preferentially and ensure the bandwidth for the voice service.

    1. On the web platform, choose QoS > Traffic Management. On the Policy Parameter Configuration page, click Create. In the displayed dialog box, set the policy name, and then configure a traffic classifier and queue scheduling.

      Configure a traffic classifier and a traffic behavior for the voice service according to Figure 29-92. Set Matched priority to DSCP and set the priority to 46. In the Configure Queue Scheduling area, set Queue type to LLQ, and Assured bandwidth to 4000Kbps. Click Confirm and OK.
      Figure 29-92  Creating a traffic policy

    2. On the web platform, choose QoS > Traffic Management. On the Policy Application page, click Create. Apply the traffic policy to GE0/0/1.
      Figure 29-93  Applying the traffic policy


  1. This example uses an AR1220 running V200R007C00SPCb00.
  2. During the configuration, the queue and bandwidth are not specified for the video and data services, and the BE queue is used for them by default. The bandwidth of the video and data services can be allocated by referring to the configuration method of the voice service. The configuration of the voice service can be implemented by adding a traffic classifier in the traffic policy, during which Matched priority is set to DSCP to perform traffic classification, and then setting the queue type and bandwidth.
  3. The traffic policy configured for queue scheduling takes effect only after being applied to the outbound interface in the outbound direction. In this example, the traffic policy is applied to GE0/0/1, and Direction is set to Outbound.
  4. If the web platform of the EasyOperation edition is displayed after your login, as shown in Figure 29-94, click in the upper right corner to switch to the web page of the Classics edition.
    Figure 29-94  Login page of the web platform of the EasyOperation edition

Updated: 2019-05-10

Document ID: EDOC1000079719

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