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CME Group requires a heartbeat interval between 5 and 60 seconds. Intervals of less than 5 seconds are not permitted. Intervals longer than 60 seconds are not supported. The recommended value is 30 (seconds). |
Set the heartbeat interval between 30 and 60 seconds. If the client system sets the heartbeat interval to greater than 60 seconds, the client system will not be able to logon.
CME Globex does not generate Heartbeat messages when responding to a Resend Request. Heartbeats are not sent even in highly unusual cases when the Resend Request takes longer to process than a heartbeat interval. For additional information, see Resend Request.
The following diagram illustrates the sequence of Logon (tag 35-MsgType=A), Logon Confirm (tag 35-MsgType=A) and Test Request (tag 35-MsgType=1) messages. In addition the diagram illustrates the recommended Heartbeat (tag 35-MsgType=0) interval and assumes no other messaging activity for 60 seconds following Logon.
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Heartbeat (tag 35-MsgType=0) messages can be sent at regularly defined intervals by either side in the absence of any other messaging and keeps the session alive. These Heartbeats heartbeats also prevents the other side from sending Test Request (tag 35-MsgType=1) messages.
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