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CLI-based Configuration Guide - IP Unicast Routing

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010

This document describes the concepts and configuration procedures of IP Service features on the device, and provides the configuration examples.
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(Optional) Configuring the Redirect Link Function for SPR

(Optional) Configuring the Redirect Link Function for SPR

Context

In the dual-gateway scenario shown in Figure 12-6, the NQA client is configured on RouterA, and the NQA server is configured on RouterC on the same link (ISP1 link); the NQA client is configured on RouterB, and the NQA server is configured on RouterD on the same link (ISP2 link). Link quality data dynamically detected by the NQA test instance is saved on the NQA client. That is, ISP1 link detection result is saved on RouterA, and ISP2 link detection result is saved on RouterB. Enterprise branch users expect that RouterA or RouterB can measure the quality of ISP1 link and ISP2 link and then select the optimal link to transmit data traffic arriving at RouterA or RouterB. The redirect link function enables gateways, RouterA and RouterB, to advertise the NQA detection result to each other and transmit traffic from a specified next hop based on the result. Both RouterA and RouterB are enterprise gateways. After the following configurations are complete, RouterA will receive from RouterB the NQA detection result of ISP2 link and redirect traffic to the optimal link (ISP1 or ISP2 link) based on the result to implement SPR. To implement SPR on RouterB, perform appropriate configurations on RouterB.

Figure 12-6 Configuring the redirect link function

Procedure

  1. Configure an NQA-relay-group on RouterB to send the NQA detection result to the remote gateway RouterA.
    1. Run system-view

      The system view is displayed.

    2. Run smart-policy-route

      A smart-policy-route is created and the smart-policy-route view is displayed.

    3. Run nqa-relay-group group-name

      An NQA-relay-group is created.

      By default, no NQA-relay-group is created.

    4. Run nqa-relay-member { interface-type interface-number | interface-name } destination dest-ip-address port port-num

      The interface that sends the NQA detection result is added into the NQA-relay-group.

    5. Run nqa-relay { interface-type interface-number | interface-name | link-path path-name } nqa-relay-group group-name

      The NQA detection result of the specified link is sent to all the members of the NQA-relay-group.

  2. Enable NQA server testing on RouterA and configure the redirect link function to redirect traffic to a specified next hop.
    1. Run system-view

      The system view is displayed.

    2. Run smart-policy-route

      A smart-policy-route is created and the smart-policy-route view is displayed.

    3. Run redirect-link { interface-type interface-number | interface-name | link-path path-name } next-hop-address

      Packets are redirected to the specified link.

    4. Run nqa-server port port-num

      The NQA server port number is configured.

      By default, no NQA server port number is configured.

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Updated: 2019-05-20

Document ID: EDOC1100034072

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