Fail Login if any units are unspecified
A minor variation on the Recommended Login - Convenience Port, this strategy will fail the login if not all known units are specified. This would provide some protection against a misconfiguration, or the unexpected introduction of additional matching units at Cboe (although Cboe would provide extensive notice and planning before introducing additional units). Differences from the recommended login are in Bold.
| Field Name | Value | Comment |
|---|---|---|
| StartOfMessage | BO E3 | |
| MessageLength | 2F 00 | 47 |
| MessageType | 01 00 | 1 (login request) |
| MatchingUnit | 00 | |
| Reserved | 00 | |
| SequenceNumber | 00 | (unsequenced) |
| SessionId | 41 42 43 44 | (ex. "ABCD") - Session Id as supplied by Cboe |
| SessionSubId | 30 30 30 31 | (ex. "0001") Session Sub Id as supplied by Cboe |
| Password | 61 62 63 64 65 66 67 68 69 6A | (ex. "abcdefghij") Password |
| ReplayInstruction | 46 | "F" - Fail unknown units. |
| NumberOfUnits | 04 | There are 4 rows in the array below, representing the 4 system matching units. |
| →UnitNumber | 01 | Matching unit #1 |
| →UnitSequence | 00 00 00 00 | Last SequenceNumber that member received with MatchUnit=1. Zero if member has not received anything for MatchUnit=1, for instance as the first login of the day. |
| →UnitNumber | 02 | Matching unit #2 |
| →UnitSequence | 00 00 00 00 | Last SequenceNumber that member received with MatchUnit=2. Zero if member has not received anything for MatchUnit=2, for instance as the first login of the day. |
| →UnitNumber | 03 | Matching unit #3 |
| →UnitSequence | 00 00 00 00 | Last SequenceNumber that member received with MatchUnit=3. Zero if member has not received anything for MatchUnit=3, for instance as the first login of the day. |
| →UnitNumber | 04 | Matching unit #4 |
| →UnitSequence | 00 00 00 00 | Last SequenceNumber that member received with MatchUnit=3. Zero if member has not received anything for MatchUnit=4, for instance as the first login of the day. |