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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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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
In What Scenarios Should I Use the DNS Relay Function?

In What Scenarios Should I Use the DNS Relay Function?

The DNS proxy or relay function enables a DNS client on a LAN to connect to an external DNS server. After the external DNS server translates the domain name of the DNS client to an IP address, the DNS client can access the Internet.

After receiving DNS query packets from the DNS client, the device with DNS proxy enabled searches the local cache. The device with DNS relay enabled directly forwards the DNS query packets to the external DNS server, and does not search the local cache.

If the DNS client needs to obtain resource records on the DNS server in real time, enable the DNS relay function on the device.

Updated: 2019-05-10

Document ID: EDOC1000079719

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