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Configuration Guide - Network Management and Monitoring

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of Network Management and Monitoring, including SNMP, RMON, NETCONF, OpenFlow, LLDP, NQA, Mirroring, Packet Capture, Packet Trace, Path and Connectivity Detection Configuration, NetStream, sFlow, and iPCA.
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Configuring a DNS Test

Configuring a DNS Test

Context

A DNS test is based on UDP packets. Only one probe packet is sent in one DNS test to detect the speed at which a DNS name is resolved to an IP address. The test result clearly reflects the performance of the DNS protocol on the network.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run dns resolve

    Dynamic DNS is enabled.

    By default, dynamic DNS is disabled.

  3. Run nqa test-instance admin-name test-name

    An NQA test instance is created, and the NQA view is displayed.

    By default, no NQA test instance is created.

  4. Run test-type dns

    The test type is set to DNS.

    By default, no test type is configured.

  5. Run dns-server ipv4 ip-address

    An IP address is configured for the DNS server in the DNS test instance.

    By default, no IP address is configured for the DNS server.

  6. Run destination-address url url-address

    A destination URL is specified for the NQA test instance.

    By default, no destination URL is configured for the NQA test instance.

  7. (Optional) Run the following commands as required to configure parameters for the DNS test.
    1. Run description string

      A description is configured for the test instance.

      By default, no description is configured for an NQA test instance.

    2. Run frequency interval

      The interval at which the NQA test instance is automatically executed is set.

      By default, the interval at which an NQA test instance is automatically performed is not configured. That is, the test is performed for one time.

    3. Run timeout time

      The timeout period of a probe is set for the NQA test instance.

      By default, the timeout period of an ICMP probe is 3 seconds.

      NOTE:

      When a DNS test instance is used, the frequency value must larger than timeout.

    4. Run source-address ipv4 ip-address

      A source IP address is configured for the probe packet.

      By default, the IP address of the port that sends the probe packet functions as the source IP address of the test instance.

    5. Run vpn-instance vpn-instance-name

      A VPN instance name is configured for the NQA test instance.

      By default, the VPN instance name is _public_.

    6. Run records history number

      The maximum number of historical records is set for the NQA test instance.

      By default, the number of history records is 60.

    7. Run records result number

      The maximum number of result records is set for the NQA test instance.

      By default, the number of test results is 5.

    8. Run agetime time

      The aging time is set for the NQA test instance.

      The default aging time of an NQA test instance is 0, indicating that the test instance is not aged.

  8. Run commit

    The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100075365

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