TCP service configuration
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Model 2285 Getting Started Guide
3 • Network configuration
To use the TCP “keep-alive” feature with the Model 2285, the users should configure three parameters
as follows:
•
TCP keep-alive time
: This represents the time interval between the last data transmission and keep-alive
packet submissions by the Model 2285. These “keep-alive” messages are sent to the remote host to confirm
that the session is still open. The default time value is 15 sec.
•
TCP “keep-alive” probes
: This represents how many “keep-alive” probes will be sent to the remote host,
until it decides that the connection is dead. Multiplied with the “TCP ’keep-alive’ intervals”, this gives the
time that a link is forced to close after a “keep-alive” packet has been sent for the first time. The default is
3 times
•
TCP keep-alive intervals
: This represents the waiting period until a “keep-alive” packet is retransmitted.
The default value is 5 seconds.
By default, the Model 2285 will send the keep-alive packets 3 times with 5 seconds interval after 15 seconds
have elapsed since the time when there’s no data transmitted back and forth.
Figure 18. TCP keep-alive configuration
