please check the following oracle support doc for the same
Error "1042017 Network error: The client or server timed out waiting to receive data using TCP/IP. Check network connections"
You can get blogs guided information for this issue.
It is suggested to have the combined values not higher than 10 minutes, as this might have a negative performance impact.
600*800 ==> /1000(milliseconds) ==> /60(seconds) = 8 Minutes
If values are set too high. The client and server are able to communicate, but some server processes are slowed down considerably and the NETDELAY and NETRETRYCOUNT values have been set to high values (.eg NETDELAY 10000, NETRETRYCOUNT 5000)
In this case decreasing the values will help to resolve the problem (see above notes)