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Test Tools

DNS Query, Ping and Traceroute can be used when troubleshooting the network.

DNS Query

To check the DNS working status of the device, take the following steps:

  1. Select System > Diagnostic Tool > Test Tools.
  2. Type a domain name into the DNS Query box.
  3. Click Test, and the testing result will be displayed in the list below.

Ping

To check the network connecting status, take the following steps:

  1. Select System > Diagnostic Tool > Test Tools.
  2. Type an IP address into the Ping box.
  3. Click Test, and the testing result will be displayed in the list below.

  4. The testing result contains two parts:
    • The Ping packet response. If there is no response from the target after timeout, it will print Destination Host Not Response, etc. Otherwise, the response contains sequence of packet, TTL and the response time.

    • Overall statistics, including number of packet sent, number of packet received, percentage of no response, the minimum, average and maximum response time.

Traceroute

Traceroute is used to test and record gateways the packet has traversed from the originating host to the destination. It is mainly used to check whether the network connection is reachable, and analyze the broken point of the network. The common Traceroute function is performed as follows: first, send a packet with TTL 1, so the first hop sends back an ICMP error message to indicate that this packet can not be sent (because of the TTL timeout); then this packet is re-sent, with TTL 2, TTL timeout is sent back again; repeat this process till the packet reaches the destination. In this way, each ICMP TTL timeout source address is recorded. As the result, the path from the originating host to the destination is identified.

To test and record gateways the packet has traversed by Traceroute, take the following steps:

  1. Select System > Diagnostic Tool > Test Tools.
  2. Type an IP address into the Traceroute box.
  3. Click Test, and the testing result will be displayed in the list below.