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.
Table 5 – Resend Request
|
Tag |
Field Name |
Req’d |
Comments |
Format |
|
Standard Header |
Y |
MsgType = 2 |
| |
|
7 |
BeginSeqNo |
Y |
|
SeqNum |
|
16 |
EndSeqNo |
Y |
|
SeqNum |
|
Standard Trailer |
Y |
|
| |