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There is no TCP Keep Alive Packages on Wireshark
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Hi All,
I have chosen TCP Keep-Alive transport type on the Modbus Data Source and connected to device.
When I track the network packages, I do not see "TCP Keep Alive" packet on wireshark. Even if I enabled and disabled the Data Source for many times during tracking, I could not see the TCP Keep Alive packets.
So, I would like to be sure that my Mango Instance (v3.7.7) is sending TCP Keep Alive packages.
Is there any suggestion how to test it?
Is that a bug at v37.7.?Thanks in advance,
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@Nurr TCP sockets remain open until they are closed or broken, the keep-alive packet is used to check if the socket is still open, not to keep the socket open.
What the modbus data source does is :
TCP with keep alive:
Open a socket to the device
Poll for data
Wait for interval
Poll for data
(if at any time the TCP connection is closed it will reopen it)TCP without keep alive:
Open socket to device
Poll for data
close Socket
Wait for interval
Open socket to device
Poll for data
close Socket -
@CraigWeb Is that normal not to see TCP Keep Alive packages on the wireshark?
