For instance, if you want to check the connection of the www.tp-link.com , you can achieve it through Diagnostic.
Open the web browser and type http://tplinklogin.net or IP address in the address bar (default is http://192.168.0.1 or http://192.168.1.1 ). Press Enter.
Type the username and password in the login page, the default username and password are both admin in lower case.
Click the System Tools on left and go to Diagnostic.
Select one of the diagnostic tools: Ping or Traceroute .
Note: Ping troubleshoots connectivity, reachability, and name resolution to a given host or gateway. Traceroute reflects the path taken to a given host. You can use ping and Traceroute to test both numeric IP address or domain name.
Select the diagnostic tool: Ping.
Type the IP Address/Domain name of the PC/server you want to ping in the IP Address/ Domain Name.
Click Start to start the diagnose. The following result indicates the connection is ok.
If ping the IP address is successful while pinging the domain name is not, you may get a DNS problem.
Select the diagnostic tool: Traceroute.
Type the IP Address/Domain name of the PC/server you wish to traceroute in the IP Address/ Domain Name.
Click Start to start diagnosing. The following result indicates the connection is ok.
When the trace is completed and the IP address in the end of the result mismatches the IP address of the server, as follows:
You can change the TTL (default is 20) in the Traceroute Max TTL. And try again.