iLink 2 Heartbeat

The Heartbeat (tag 35-MsgType=0) message is sent in response to a iLink 2 Test Request to ensure connectivity.

Tag	Name	FIX Type	Enumeration	Req	Description
iLink 2 Standard Header - Client System to CME Globex
iLink 2 Standard Header - CME Globex to Client System
35	MsgType	String(2)	0=Heartbeat	Y	Header tag identifying message type.
112	TestReqID	String(20)		N	Required if heartbeat message is generated in response to a Test Request message. In this case, this tag must contain the TestReqID that was sent in the Test Request message.
9553	SplitMsg	Int(1)	0 – Split message 1 – Out-of-order message 2 – Complete message	N	Indicates whether a message was subject to additional processing as a result of being: split among multiple packets (0) out-of-order (1) a previously submitted split message (2) If absent, then the message was not subject to additional processing.
iLink 2 Standard Message Trailer					End of message.

Y: Required by FIX protocol, Y*: Required by CME Globex (not by FIX protocol), N: Not Required, C: Conditionally