The resend request is sent by the receiving application to initiate the retransmission of messages. This function is utilized if a sequence number gap is detected, if the receiving application lost a message, or as a function of the initialization process.
The resend request can be used to request a single message, a range of messages or all messages subsequent to a particular message.
The resend request format is as follows:
Resend Request
|
Tag |
Field Name |
Req’d |
Comment |
|
|
Standard Header |
Y |
MsgType = 2 |
|
7 |
BeginSeqNo |
Y |
Begin Sequence Number |
|
16 |
EndSeqNo |
Y |
End Sequence Number. If request is for all messages subsequent to a particular message, EndSeqNo (16) = '0' (representing infinity). |
|
|
Standard Trailer |
Y |
|
FIX message example:
8 BeginString = FIX.4.2
9 BodyLength = 100
35 MsgType = 2 "ResendRequest"
34 MsgSeqNum = 2
49 SenderCompID = SERVERTEST
52 SendingTime = 20140121-18:07:28.737
56 TargetCompID = CQGTEST
7 BeginSeqNo = 1
16 EndSeqNo = 0 "Infinity"
10 CheckSum = 159