This topic contains the message specification for the Logon (tag 35-MsgType=A) message sent from the Client System to CME Globex initiates the session logon.
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Tag | Name | FIX Type | Enumeration | Req | Description |
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Standard Header - Client System to CME Globex |
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| 35 | MsgType | String(2) | A=Logon | Y | Header tag identifying message type. | 108 | HeartBtlnt | Int(3) | 30-60 inclusive | Y | Hearbeat interval in seconds. - 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).
- CME Globex uses the heartbeat interval submitted in the customer Logon message.
| 141 | ResetSeqNumFlag | Boolean(1) | Y=Yes, reset sequence numbers N=No | C | Indicates that both sides of the FIX session should reset sequence numbers. For beginning of week and mid-week logon, tag 141 is optional but a Logon message with 141=Y will receive a Logout message in response. During in-session logon, tag 141 is required and must be set to "Y". Messages with incorrect or missing tag 141 values will result in session logout. | 1603 | ApplicationSystemName | String(30) | Value obtained from GAM or ISV. | Y* | Identifies system generating the message. | 1604 | TradingSystemVersion | String(10) | Value obtained from GAM or ISV. | Y* | Identifies the version of the system generating the message. | 1605 | ApplicationSystemVendor | String(10) | Value obtained from GAM or ISV. | Y* | Identifies the vendor of the application system. | 354 | EncodedTextLen | Length(2) |
| C | Length of the Access Key ID. Must be sent if tag 355-EncodedText field is specified and must immediately precede it. | 355 | EncodedText | Data(32) |
| C | Contains the Access Key ID assigned to the session ID in tag 49-SenderCompID. | 1400 | EncryptedPasswordMethod | String(13) | CME-1-SHA-256 | C | Defines the method used to create secure cryptographic hash in the encrypted password field. For day 1 the only valid value supported is CME-SHA-256 which represents first CME version of message digest or hash of SHA-256. | 1401 | EncryptedPasswordLen | Length(2) |
| C | Length of tag 1402-EncryptedPassword which contains the HMAC signature. | 1402 | EncryptedPassword | Data(44) |
| C | Contains the HMAC signature built with HMAC data using the instruction provided. | iLink 2 Standard Message Trailer |
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| End of message. |
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